CN113062715B - Organic-rich rock in-situ thermal recovery mode comparison simulation device and experimental method thereof - Google Patents
Organic-rich rock in-situ thermal recovery mode comparison simulation device and experimental method thereof Download PDFInfo
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- CN113062715B CN113062715B CN202110216382.1A CN202110216382A CN113062715B CN 113062715 B CN113062715 B CN 113062715B CN 202110216382 A CN202110216382 A CN 202110216382A CN 113062715 B CN113062715 B CN 113062715B
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- 239000011435 rock Substances 0.000 title claims abstract description 233
- 238000004088 simulation Methods 0.000 title claims abstract description 100
- 238000011084 recovery Methods 0.000 title claims description 101
- 238000002474 experimental method Methods 0.000 title claims description 17
- 238000011065 in-situ storage Methods 0.000 title claims description 13
- 238000010438 heat treatment Methods 0.000 claims abstract description 59
- 238000001816 cooling Methods 0.000 claims abstract description 11
- 238000012806 monitoring device Methods 0.000 claims abstract description 11
- 239000007789 gas Substances 0.000 claims description 448
- 238000002347 injection Methods 0.000 claims description 164
- 239000007924 injection Substances 0.000 claims description 164
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 136
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 claims description 124
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 claims description 124
- 239000003921 oil Substances 0.000 claims description 95
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 89
- 239000001301 oxygen Substances 0.000 claims description 89
- 229910052760 oxygen Inorganic materials 0.000 claims description 89
- 238000002485 combustion reaction Methods 0.000 claims description 86
- 239000010720 hydraulic oil Substances 0.000 claims description 80
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 77
- 229910052757 nitrogen Inorganic materials 0.000 claims description 62
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 48
- 230000001105 regulatory effect Effects 0.000 claims description 45
- 239000000498 cooling water Substances 0.000 claims description 34
- 238000012360 testing method Methods 0.000 claims description 22
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 17
- 229910001882 dioxygen Inorganic materials 0.000 claims description 17
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 12
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 238000012544 monitoring process Methods 0.000 claims description 9
- 239000007921 spray Substances 0.000 claims description 9
- 230000001276 controlling effect Effects 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- 239000011229 interlayer Substances 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 239000001569 carbon dioxide Substances 0.000 claims description 6
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 6
- 238000003860 storage Methods 0.000 claims description 6
- 238000005086 pumping Methods 0.000 claims description 4
- 238000009841 combustion method Methods 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 238000004458 analytical method Methods 0.000 abstract description 3
- 230000002349 favourable effect Effects 0.000 abstract 1
- 238000003825 pressing Methods 0.000 description 10
- 238000004868 gas analysis Methods 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 5
- 238000005065 mining Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 239000013064 chemical raw material Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000004058 oil shale Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 239000003079 shale oil Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
- E21B43/243—Combustion in situ
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The device comprises an experimental tower and a computer, wherein the experimental tower is integrally of a cylinder structure and comprises a tower footing, a tower body and a tower top, the upper end of the tower footing is fixedly connected with the lower end of the tower body in an integrated manner, the upper end of the tower body is detachably and fixedly connected with the lower end of the tower top, a hydraulic power device and a heating device are arranged in the tower footing, a pressurizing device, a gas collecting device, a monitoring device and a cooling device are arranged in the tower body, the hydraulic power device is connected with the pressurizing device, and the computer is in signal connection with the hydraulic power device, the heating device, the monitoring device and the cooling device respectively. The invention can realize real simulation of rock strata at different depths underground, realize heating analysis of the organic-rich rock sample by three different heating modes, record and compare the gas yield of the organic-rich rock sample at different temperatures, and is favorable for deeply researching the influence of the three heating modes at different temperatures on the shale gas yield.
Description
Technical Field
The invention relates to the field of simulated exploitation of organic-rich rocks, in particular to an in-situ thermal exploitation mode comparison simulation device of the organic-rich rocks and an experimental method thereof.
Background
The organic-rich rock is mainly high-quality raw oil shale in geological history, the shale gas is unconventional natural gas which is attached to the organic-rich shale and an interlayer thereof and mainly exists in adsorption and free states, and the component is mainly methane, so that the shale gas is a clean and efficient energy resource and chemical raw material, has wide application and has higher industrial economic value. With the increase of environmental protection pressure, in-situ mining of the organic-rich rock becomes a necessary development trend of commercial large-scale mining of the organic-rich rock in the future.
Organic matters in the organic-rich rock are heated to a certain high temperature and then are pyrolyzed. Meanwhile, parameters of all aspects of the whole stratum can be changed, and parameters of rock structure, stress distribution, material composition and the like can be changed. Therefore, the mutual penetration, integration and application of the organic-rich rock pyrolysis technology, the temperature control technology, the high-temperature shale oil and gas gathering and transportation technology, the information control technology, the heat preservation technology and the like are the main directions of the current technical development. At present, the heating modes of in-situ mining of the rich-organic rock mainly comprise direct combustion heating, high-temperature gas heating, metal heat conduction heating and the like. However, the influence of different heating forms and different temperatures on the shale gas yield is not systematically studied and compared.
Disclosure of Invention
The invention aims to provide an organic-rich rock in-situ thermal recovery mode comparison simulation device and an experimental method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
rich organic rock normal position thermal recovery mode contrast analogue means, including experiment tower and computer, the whole drum structure that is of experiment tower, the experiment tower is by the column foot, body of the tower and top of the tower are constituteed, the upper end of column foot and the lower extreme integrated into one piece fixed connection of body of the tower, fixed connection can be dismantled with the lower extreme at the top of the tower to the upper end of body of the tower, be provided with hydraulic power device and heating device in the column foot, be provided with pressure device in the body of the tower, gas collection device, monitoring devices and cooling device, hydraulic power device is connected with pressure device, the computer respectively with hydraulic power device, heating device, monitoring devices and cooling device signal connection.
The hydraulic power device comprises a hydraulic pump and a hydraulic oil tank, wherein the hydraulic pump and the hydraulic oil tank are fixedly arranged at the left side part in the tower footing, an oil inlet of the hydraulic pump is connected with an oil outlet of the hydraulic oil tank, the oil outlet of the hydraulic pump is connected with an oil supply pipe, the oil supply pipe penetrates through the left side plate of the tower footing leftward and extends out of the tower footing, the left end of the oil supply pipe is fixedly connected with an oil pipe, the oil pipe is vertically arranged on the left side of the tower body, and a computer is in signal connection with the hydraulic pump.
The heating device comprises a combustion chamber, a mixed gas pipe, an igniter, an acetylene conveying pipe and an oxygen conveying pipe, wherein the combustion chamber is concentrically and vertically arranged in the middle part of the tower footing and is of a cylindrical structure with an open top, the outer circumference of the combustion chamber is fixedly connected with the periphery of the inner wall of the tower footing through a plurality of first cross rods, iris opening and closing devices are fixedly arranged at the top part and the middle part of the inner circle of the combustion chamber, a fixed bottom plate is fixedly connected to the bottom in the tower body, a through round hole is formed in the middle part of the fixed bottom plate, a fixed cover covering the round hole is fixedly arranged in the middle part of the upper surface of the fixed bottom plate and is of a cylindrical structure with an open bottom, the top part of the fixed cover is of a conical structure with a thin upper part and a thick lower part, a plurality of conical spray holes with small outer part and large inner part are uniformly formed in the side wall of the fixed cover, the lower end edge of the fixed cover is fixedly connected to the outer side of the round hole, the mixed gas pipe is concentrically and vertically arranged in the combustion chamber, the lower end of the mixed gas pipe is blocked and downwards penetrates through the bottom plate of the combustion chamber, the mixed gas pipe is connected with the bottom plate of the combustion chamber in a sliding manner, the upper end of the mixed gas pipe is open and upwards penetrates through a round hole to extend into the fixing cover, the mixed gas pipe penetrates through the middle parts of the two iris opening and closing devices, the upper end of the mixed gas pipe is fixedly connected with a mixed gas nozzle, an igniter is fixedly arranged on the mixed gas nozzle, the gas outlet end of an acetylene conveying pipe and the gas outlet end of an oxygen conveying pipe are respectively and fixedly connected with the lower side part of the mixed gas pipe, the right side part of the outer circumference of the tower base is rotatably provided with a rotating shaft which is horizontally arranged along the left and right direction, the left end of the rotating shaft extends into the tower base and is fixedly provided with a gear, the outer wall of the rear side of the mixed gas pipe is vertically provided with a rack structure meshed with the gear, the right end of the rotating shaft penetrates through the right side part of the outer circumference of the tower base and is fixedly provided with a rotating hand wheel, the front side part of the outer circumference of the tower base is fixedly provided with a gas pipe joint, the gas pipe joint is provided with an acetylene gas inlet pipe, an oxygen gas inlet pipe and a nitrogen gas inlet pipe, the two ends of the acetylene gas inlet pipe, the two ends of the oxygen gas inlet pipe and the two ends of the nitrogen gas inlet pipe are respectively communicated with the inside of the tower foundation and the outside of the tower foundation, the gas inlet end of the acetylene gas conveying pipe is fixedly connected with the inner end of the acetylene gas inlet pipe, the gas inlet end of the oxygen gas conveying pipe is fixedly connected with the inner end of the oxygen gas inlet pipe, the upper part of the outer circumference of the combustion chamber is wound with a nitrogen coil, the gas outlet end of the nitrogen coil upwards penetrates through the fixed bottom plate and extends into the fixed cover, the gas inlet end of the nitrogen coil is fixedly connected with the inner end of the nitrogen gas inlet pipe, the lower part of the outer circumference of the combustion chamber is wound with a first high heat conduction pipe, the first high heat conduction pipe is a closed loop coil, the inner bottom of the tower body is provided with two second high heat conduction pipes which are arranged side by side, and the whole appearance of the door frame structure with an opening at the front side, the rear side and the lower side, the fixed cover is positioned inside the second high heat conduction pipe, the lower end of the left side and the lower end of the right side of the second high heat conduction pipe both downwards penetrate through the fixed bottom plate and are fixedly connected with the uppermost side of the first high heat conduction pipe, the upper part of the outer circumference and the lower part of the outer circumference of the combustion chamber are both fixedly connected with an exhaust pipe communicated with the outside, the inner end of the exhaust pipe at the upper side is communicated with the upper part in the combustion chamber, the inner end of the exhaust pipe at the lower side is communicated with the lower part in the combustion chamber, an acetylene cylinder, an oxygen cylinder and a nitrogen cylinder are arranged outside the tower foundation, the gas outlet end of the acetylene cylinder is connected with the outer end of the acetylene gas inlet pipe through an acetylene injection pipe, the gas outlet end of the oxygen cylinder is connected with the outer end of the oxygen gas inlet pipe through an oxygen injection pipe, the gas outlet end of the nitrogen cylinder is connected with the outer end of the nitrogen gas inlet pipe through a nitrogen injection pipe, a first pneumatic regulating valve is arranged on the acetylene injection pipe, and a second pneumatic regulating valve is arranged on the oxygen injection pipe, a third pneumatic regulating valve is arranged on the nitrogen injection pipe;
the computer is respectively connected with the igniter, the iris opening and closing device, the first pneumatic regulating valve, the second pneumatic regulating valve and the third pneumatic regulating valve through signals.
The pressurizing device comprises a first hydraulic injection pipe joint, a first hydraulic pipe, a first constant pressure valve, a first upper pressurizing plate, a first lower pressurizing plate, a second hydraulic injection pipe joint, a second hydraulic pipe, a second constant pressure valve, a second upper pressurizing plate, a second lower pressurizing plate, a third hydraulic injection pipe joint, a third hydraulic pipe, a third constant pressure valve, a third upper pressurizing plate and a third lower pressurizing plate, wherein tracks are vertically and fixedly arranged on the front side and the rear side of the inner wall of the tower body, the first hydraulic injection pipe joint, the second hydraulic injection pipe joint and the third hydraulic injection pipe joint are sequentially and fixedly arranged on the upper part of the left side part of the outer circumference of the tower body, the upper side of the middle part and the lower side of the middle part from top to bottom, the first hydraulic injection pipe joint, the second hydraulic injection pipe joint and the third hydraulic injection pipe joint are of a three-way structure, oil outlets at the right ends of the first hydraulic injection pipe joint, the second hydraulic injection pipe joint and the third hydraulic injection pipe joint extend into the tower body, the left end oil inlet of a first hydraulic injection pipe joint is fixedly connected with the upper end oil outlet of an upper oil pipe, the lower end oil outlet of the first hydraulic injection pipe joint is connected with the upper end oil inlet of a second hydraulic injection pipe joint through a first hydraulic pipe, a first constant pressure valve is installed on the first hydraulic pipe, the lower end oil outlet of the second hydraulic injection pipe joint is connected with the upper end oil inlet of a third hydraulic injection pipe joint through a second hydraulic pipe, a second constant pressure valve is installed on the second hydraulic pipe, the lower end oil outlet of the third hydraulic injection pipe joint is connected with the oil inlet of a hydraulic oil tank through a third hydraulic pipe, a third constant pressure valve is installed on the third hydraulic pipe, a first upper pressure plate, a first lower pressure plate, a second upper pressure plate, a second lower pressure plate, a third upper pressure plate and a third lower pressure plate are all horizontally arranged, and the first upper pressure plate, the first lower pressure plate, the second upper pressure plate and the third lower pressure plate are all horizontally arranged, The second lower pressure plate, the third upper pressure plate and the third lower pressure plate are arranged in the tower body in a sliding manner from top to bottom along two tracks, the outer edge side parts of the lower surfaces of the first upper pressure plate, the second upper pressure plate and the third upper pressure plate are fixedly provided with a plurality of limit upright posts arranged in a circumferential array manner, the first upper pressure plate and the first lower pressure plate are positioned at the upper part in the tower body and are as high as the first hydraulic injection pipe joint, the oil outlet at the right end of the first hydraulic injection pipe joint is positioned between the first upper pressure plate and the first lower pressure plate, the second upper pressure plate and the second lower pressure plate are positioned at the upper side of the middle part in the tower body and are as high as the second hydraulic injection pipe joint, the oil outlet at the right end of the second hydraulic injection pipe joint is positioned between the second upper pressure plate and the second lower pressure plate, the third upper pressure plate and the third lower pressure plate are positioned at the lower side of the middle part in the tower body and are as high as the third hydraulic injection pipe joint, the right end oil outlet of the third hydraulic injection pipe joint is positioned between the third upper pressure plate and the third lower pressure plate, the cavity between the first lower pressure plate and the second upper pressure plate is a first cabin, the cavity between the second lower pressure plate and the third upper pressure plate is a second cabin, the cavity between the third lower pressure plate and the fixed bottom plate is a third cabin, the pipe diameters of the first hydraulic pipe, the second hydraulic pipe and the third hydraulic pipe are sequentially reduced, the rated pressures of the first constant pressure valve, the second constant pressure valve and the third constant pressure valve are sequentially increased, the first cabin, the second cabin and the third cabin are all filled with organic rock samples, a plurality of jacking columns are fixedly arranged on the circumferential array of the inner wall of the tower top, the lower ends of the jacking columns are all in jacking contact with the upper surface of the first upper pressure plate, the upper surfaces of the first upper pressure plate, the first lower pressure plate, the second upper pressure plate, the second lower pressure plate, the third upper pressure plate and the third lower pressure plate are fixedly connected with two radially symmetrical hooks.
The gas collecting device comprises a gas collecting pipe, the gas collecting pipe is concentrically and vertically arranged in the tower body, the lower side part of the outer circumference of the gas collecting pipe is fixedly connected with the lower side part of the inner wall of the tower body through a plurality of second cross rods which are positioned below a third lower pressure plate and are arranged in a circumferential array, the middle parts of a first upper pressure plate, a first lower pressure plate, a second upper pressure plate, a second lower pressure plate, a third upper pressure plate and a third lower pressure plate are all sleeved on the gas collecting pipe in a sliding manner, gas collecting holes are uniformly formed in the pipe wall of the gas collecting pipe, a tail gas recovery cover is concentrically and vertically arranged in the tower top, a plurality of vertical rods at the top of the tail gas recovery cover are fixedly connected with the top of the inner wall of the tower top, the bottom of the tail gas recovery cover is open, the tail gas recovery cover is sleeved on the periphery of the top of the gas collecting pipe, the lower end edge of the tail gas recovery cover is in top pressure contact with the upper surface of the first upper pressure plate, and the tail gas recovery pipe is connected with the tail gas recovery cover, the recovery pipe passes the top of the tower and is connected with outside gas holder, the fixed first infrared ray gas analysis appearance that is provided with in lower surface middle part of first pressure plate down, the fixed second infrared ray gas analysis appearance that is provided with in lower surface middle part of pressure plate under the second, the fixed third infrared ray gas analysis appearance that is provided with in lower surface middle part of pressure plate under the third, first infrared ray gas analysis appearance, second infrared ray gas analysis appearance and third infrared ray gas analysis appearance all overlap on the discharge, the computer respectively with first infrared ray gas analysis appearance, second infrared ray gas analysis appearance and third infrared ray gas analysis appearance signal connection.
The monitoring device comprises three groups of monitoring components which are fixedly arranged on the inner wall of the tower body at intervals up and down, the three groups of monitoring components are respectively and correspondingly arranged in the first cabin, the second cabin and the third cabin, each group of monitoring components comprises a temperature sensor and a pressure sensor, and the computer is respectively in signal connection with the three temperature sensors and the three pressure sensors;
the cooling device comprises a cooling water circulating pipe and a cold water tank, a tower foundation, hollow interlayers are arranged inside a tower wall of a tower body and a tower top, the cooling water circulating pipe is densely distributed inside the hollow interlayers of the tower wall of the tower body, the water inlet end and the water outlet end of the cooling water circulating pipe extend out of the tower body, a flow regulating valve is installed at the water inlet end of the cooling water circulating pipe, the water inlet end of the cooling water circulating pipe is connected with the water outlet end of the cold water tank through a cooling water inlet pipe, the water outlet end of the cooling water circulating pipe is connected with the water inlet end of the cold water tank through a cooling water outlet pipe, a water pump is installed on the cooling water inlet pipe, and a computer is in signal connection with the flow regulating valve and the water pump respectively.
The experimental method of the in-situ thermal recovery mode comparison simulation device for the rich-organic rock comprises three thermal recovery mode simulation experiments:
a first thermal recovery mode simulation experiment: filling the third cabin, the second cabin and the first cabin with the organic-rich rock sample in sequence, installing the whole device, and performing a thermal recovery simulation experiment on the organic-rich rock sample by adopting a direct combustion method;
the second thermal recovery mode simulation experiment: filling the third cabin, the second cabin and the first cabin with organic rock samples with the same or similar geological conditions in sequence, installing the whole device, and carrying out thermal recovery simulation experiments on the organic rock samples by adopting a high-temperature gas heating method;
a third thermal recovery mode simulation experiment: and filling the third cabin, the second cabin and the first cabin with the organic rock sample with the same or similar geological conditions in sequence, installing the whole device, and carrying out thermal recovery simulation experiment on the organic rock sample by adopting a metal heat conduction heating method.
The first thermal recovery mode simulation experiment comprises the following specific steps:
(1) filling the third cabin, the second cabin and the first cabin with the organic-rich rock sample in sequence: firstly, opening the tower top, initially arranging a first upper pressure plate, a first lower pressure plate, a second upper pressure plate, a second lower pressure plate, a third upper pressure plate and a third lower pressure plate outside the tower body, filling the rich organic rock sample into the tower body, enabling the rich organic rock sample to fall onto a fixed bottom plate, stopping filling the rich organic rock sample when the height of the rich organic rock sample is equal to the height of a third hydraulic injection pipe joint, sequentially sleeving the third lower pressure plate and the third upper pressure plate on a gas collecting pipe from top to bottom, downwards arranging the third lower pressure plate and the third upper pressure plate into the tower body, enabling the lower surface of the third lower pressure plate to be tightly pressed on the rich organic rock sample, supporting the lower end of each limit upright column on the lower surface of the third upper pressure plate on the upper surface of the third lower pressure plate, and enabling the third upper pressure plate and the third lower pressure plate to be positioned at the lower side of the middle part in the tower body and to be as high as the third hydraulic injection pipe joint, the oil outlet at the right end of the third hydraulic injection pipe joint is positioned between the third upper pressure plate and the third lower pressure plate, so that the third chamber is filled with the organic rock sample, then the organic rock sample is continuously filled into the tower body, the organic rock sample falls onto the third upper pressure plate, when the height of the organic rock sample reaches the height of the second hydraulic injection pipe joint, the filling of the organic rock sample is stopped, the second lower pressure plate and the second upper pressure plate are sequentially sleeved on the gas collecting pipe from top to bottom, the second lower pressure plate and the second upper pressure plate are downwards placed into the tower body, the lower surface of the second lower pressure plate is tightly pressed on the organic rock sample, the lower end of each limit upright column on the lower surface of the second upper pressure plate is supported on the upper surface of the second lower pressure plate, and the second upper pressure plate and the second lower pressure plate are positioned at the upper side of the middle part in the tower body and have the same height as the second hydraulic injection pipe joint, the right end oil outlet of the second hydraulic injection pipe joint is positioned between the second upper pressure plate and the second lower pressure plate, so that the second cabin is filled with the organic rock sample, then the tower body is continuously filled with the organic rock sample, the organic rock sample falls onto the second upper pressure plate, when the height of the organic rock sample is equal to that of the first hydraulic injection pipe joint, the filling of the organic rock sample is stopped, the first lower pressure plate and the first upper pressure plate are sequentially sleeved on the gas collecting pipe from top to bottom, the first pressure plate and the first upper pressure plate are placed into the tower body downwards, the lower surface of the first lower pressure plate is tightly pressed on the organic rock sample, the lower ends of the limit columns on the lower surface of the first upper pressure plate are supported on the upper surface of the first lower pressure plate, and the first upper pressure plate and the first lower pressure plate are positioned at the upper part in the tower body and are as high as the first hydraulic injection pipe joint, an oil outlet at the right end of the first hydraulic injection pipe joint is positioned between the first upper pressure plate and the first lower pressure plate, so that an organic rock sample is filled in the first cabin, then the top of the tower is fixedly installed at the top of the tower body again, the tail gas recovery cover is sleeved on the periphery of the top of the gas collecting pipe, the lower end edge of the tail gas recovery cover is in top pressure contact with the upper surface of the first upper pressure plate, and the lower ends of the top pressure upright columns are also in top pressure contact with the upper surface of the first upper pressure plate;
(2) the organic rock-rich sample is pressurized, and the real simulation of rock strata at different depths in the underground is realized: starting a hydraulic pump, pumping hydraulic oil in a hydraulic oil tank out by the hydraulic pump and pumping the hydraulic oil into an oil supply pipe, enabling the hydraulic oil to enter a first hydraulic injection pipe joint through the upper end of the oil supply pipe, enabling the hydraulic oil to enter a gap between a first upper pressure plate and a first lower pressure plate through an oil outlet at the right end of the first hydraulic injection pipe joint, enabling the first lower pressure plate to downwards extrude an organic rock sample rich in the first cabin under the pressure action of the hydraulic oil, enabling the hydraulic oil to enter a first hydraulic pipe through an oil outlet at the lower end of the first hydraulic injection pipe joint, increasing the working pressure of the hydraulic pump through computer control, opening a first constant pressure valve when the pressure of the hydraulic oil reaches the rated pressure of the first constant pressure valve, enabling the hydraulic oil to enter a second hydraulic injection pipe joint through the first hydraulic pipe, enabling the hydraulic oil to enter a gap between the second upper pressure plate and the second lower pressure plate through an oil outlet at the right end of the second hydraulic injection pipe joint, the gap between the second upper pressure plate and the second lower pressure plate is enlarged, the second upper pressure plate upwards extrudes the organic rock sample rich in the first chamber under the pressure action of the hydraulic oil, the second lower pressure plate downwards extrudes the organic rock sample rich in the second chamber under the pressure action of the hydraulic oil, meanwhile, the hydraulic oil enters a second hydraulic pipe through an oil outlet at the lower end of a second hydraulic injection pipe joint, when the pressure of the hydraulic oil reaches the rated pressure of the second constant pressure valve, the second constant pressure valve is opened, the hydraulic oil enters a third hydraulic injection pipe joint through the second hydraulic pipe, the hydraulic oil enters the gap between the third upper pressure plate and the third lower pressure plate through an oil outlet at the right end of the third hydraulic injection pipe joint, the gap between the third upper pressure plate and the third lower pressure plate is enlarged, and the third upper pressure plate upwards extrudes the organic rock sample rich in the second chamber under the pressure action of the hydraulic oil, the third lower pressure plate extrudes the organic rock sample in the third chamber downwards under the pressure action of the hydraulic oil, meanwhile, the hydraulic oil enters the third hydraulic pipe through the oil outlet at the lower end of the third hydraulic injection pipe joint, when the pressure of the hydraulic oil reaches the rated pressure of the third constant pressure valve, the second constant pressure valve is opened, the hydraulic oil enters the hydraulic oil tank through the third hydraulic pipe, so that the hydraulic oil can circulate, because the pipe diameters of the first hydraulic pipe, the second hydraulic pipe and the third hydraulic pipe are sequentially reduced, the rated pressures of the first constant pressure valve, the second constant pressure valve and the third constant pressure valve are sequentially increased, the pressure of the first lower pressure plate on the organic rock sample in the first chamber, the pressure of the second lower pressure plate on the organic rock sample in the second chamber and the pressure of the third lower pressure plate on the organic rock sample in the third chamber are sequentially increased, and thus, realizing real simulation of rock strata at different depths in the underground;
(3) directly burning and heating the rock sample rich in organic substances: the mixing air tap and the igniter are both positioned in the fixed cover at the beginning, the switch valves on the acetylene cylinder and the oxygen cylinder are opened, the acetylene in the acetylene cylinder enters the mixed gas pipe through the acetylene injection pipe and the acetylene gas inlet pipe, the oxygen in the oxygen cylinder enters the mixed gas pipe through the oxygen injection pipe and the oxygen gas inlet pipe, the acetylene and the oxygen are mixed in the mixed gas pipe, the igniter is controlled by a computer to start, mixed gas of acetylene and oxygen sprayed from the mixing air tap is ignited, high-temperature flame generated by acetylene combustion is sprayed out through each conical spray hole on the fixing cover, the high-temperature flame directly burns and heats the organic-rich rock sample in the third cabin, heat is transferred upwards, the organic-rich rock samples in the second cabin and the first cabin are respectively heated, and the organic-rich rock samples in the third cabin, the second cabin and the first cabin are heated and analyzed to generate mixed gas containing methane;
(4) testing and recording gas generated by heating and analyzing the organic-rich rock sample through three infrared gas analyzers: starting the water pump and the first infrared gas analyzer, the second infrared gas analyzer and the third infrared gas analyzer, wherein the temperature sensors in the first cabin, the second cabin and the third cabin can respectively monitor the temperature in the first cabin, the second cabin and the third cabin in real time and transmit the monitored temperature to the computer for recording, meanwhile, the pressure sensors in the first cabin, the second cabin and the third cabin can respectively monitor the pressure in the first cabin, the second cabin and the third cabin in real time and transmit the monitored pressure to the computer for recording, cold water in the cold water tank is pumped into the cooling water circulating pipe through the water pump, the cold water flows along the cooling water circulating pipe and flows back to the cold water tank, the cold water cools the interiors of the first cabin, the second cabin and the third cabin, the flow regulating valve is controlled through the computer so as to further control the flow of the cold water, the temperature in the first cabin, the second cabin and the third cabin is stabilized at a set temperature, the mixed gas in the third cabin enters a gas collecting pipe through a gas collecting hole on the gas collecting pipe and then flows upwards along the gas collecting pipe to pass through a third infrared gas analyzer, the third infrared gas analyzer tests the methane content in the mixed gas in the third cabin and transmits the measured data to a computer for recording, the mixed gas in the third cabin upwards enters the second cabin through the gas collecting pipe, the mixed gas in the second cabin enters the gas collecting pipe through the gas collecting hole on the gas collecting pipe, the mixed gas in the third cabin and the mixed gas in the second cabin flow upwards through the second infrared gas analyzer together, the second infrared gas analyzer tests the total methane content in the mixed gas in the third cabin and the mixed gas in the second cabin and transmits the measured data to the computer for recording, the mixed gas in the third cabin and the mixed gas in the second cabin upwards enter the first cabin through the gas collecting pipe, the mixed gas in the first cabin enters the gas collecting pipe through the gas collecting hole on the gas collecting pipe, so that the mixed gas in the third cabin, the mixed gas in the second cabin and the mixed gas in the first cabin upwards flow through the first infrared gas analyzer together, the first infrared gas analyzer tests the total content of methane in the mixed gas in the third cabin, the mixed gas in the second cabin and the mixed gas in the first cabin, the measured data are transmitted to the computer for recording, further the methane gas production rate of the organic rock sample at the set temperature is obtained, and finally the mixed gas in the third cabin, the mixed gas in the second cabin, the mixed gas in the first cabin and the mixed gas generated by the combustion reaction of acetylene and oxygen are upwards discharged into the tail gas recovery hood along the gas collecting pipe, then enters an external gas storage tank through a recovery pipe;
in order to obtain more gas production rates of the organic-rich rock samples at different temperatures, a plurality of groups of simulation devices are arranged, the organic-rich rock samples in each group of simulation devices are all the organic-rich rock samples under the same or similar geological conditions, errors caused by the organic-rich rock samples are reduced, a computer is used for respectively controlling a first pneumatic regulating valve and a second pneumatic regulating valve of each group of simulation devices, the flow rate and flow of acetylene and oxygen required by each group of simulation devices are respectively controlled, the flow regulating valve of each group of simulation devices is used for controlling the flow rate of cold water in a cold water circulating pipe, so that the organic-rich rock samples in each group of simulation devices are analyzed to produce gas at different temperatures, and the gas production rates of the organic-rich rock samples at different temperatures are recorded and compared.
The second thermal recovery mode simulation experiment comprises the following specific steps:
(1) filling a third cabin, a second cabin and a first cabin with organic rock samples with the same or similar geological conditions in sequence, and the steps are the same as the step (1) of the first thermal recovery mode simulation experiment;
(2) pressurizing the rock sample rich in organic matters to realize real simulation of rock strata at different depths underground, wherein the step (2) is the same as that of the simulation experiment of the first thermal recovery mode;
(3) and preparing high-temperature gas, and heating the organic-rich rock sample by using the high-temperature gas: the opening of the two iris opening and closing devices is controlled by a computer, a rotating hand wheel is rotated to enable the rotating shaft to rotate, the rotating shaft drives a gear to rotate, the gear is meshed with a rack structure, so that the mixed gas pipe is driven to vertically move downwards, the upper end of the mixed gas pipe penetrates through the circular hole and the middle part of the iris opening and closing device on the upper side and is positioned on the upper part in the combustion chamber, then the two iris opening and closing devices are controlled to be closed by the computer, the top of the combustion chamber is plugged by the iris opening and closing device on the upper side, the middle part of the inner circle of the combustion chamber is plugged by tightly attaching the inner circle of the iris opening and closing device on the lower side and the outer circle of the mixed gas pipe, the switch valves on the acetylene cylinder and the oxygen cylinder are opened, acetylene in the acetylene cylinder enters the mixed gas pipe through the acetylene injection pipe and the acetylene gas inlet pipe, oxygen in the oxygen cylinder enters the mixed gas pipe through the oxygen injection pipe and the oxygen inlet pipe, and the acetylene and the mixed gas are mixed gas in the mixed gas pipe, the igniter is controlled by a computer to be started, the mixed gas of acetylene and oxygen sprayed from the mixing air tap is ignited, the acetylene is combusted at the upper part in the combustion chamber, carbon dioxide and water vapor generated by the combustion reaction of the acetylene and the oxygen are discharged to the outside of the tower footing through the exhaust pipe at the upper side, the upper part of the outer circumference of the combustion chamber is wound with a nitrogen coil pipe, a switch valve on the nitrogen bottle is opened, the nitrogen in the nitrogen bottle enters the nitrogen coil pipe through a nitrogen injection pipe and a nitrogen inlet pipe, the flow of the nitrogen is regulated through a third pneumatic regulating valve, the nitrogen in the nitrogen coil pipe is heated by the high temperature generated by the combustion of the acetylene to become high-temperature gas, the heated nitrogen enters a fixed cover from the air outlet end of the nitrogen coil pipe and enters a third chamber through each conical spray hole, the heated nitrogen heats the organic rock sample rich in the third chamber, and the heat is transferred upwards, heating the organic-rich rock samples in the second chamber and the first chamber respectively, and heating and analyzing the organic-rich rock samples in the third chamber, the second chamber and the first chamber to generate a mixed gas containing methane;
(4) and testing and recording gas generated by heating and analyzing the organic-rich rock sample through the three infrared gas analyzers, wherein the testing and recording are the same as the step (4) of the first thermal recovery mode simulation experiment.
The third thermal recovery mode simulation experiment comprises the following specific steps:
(1) filling a third cabin, a second cabin and a first cabin with organic rock samples with the same or similar geological conditions in sequence, and the steps are the same as the step (1) of the first thermal recovery mode simulation experiment;
(2) pressurizing the rock sample rich in organic matters to realize real simulation of rock strata at different depths underground, wherein the step (2) is the same as that of the simulation experiment of the first thermal recovery mode;
(3) the high heat pipe heating of first high heat pipe and second makes the high heat pipe of second heat rich organic rock sample: the opening of the two iris opening and closing devices is controlled by a computer, a rotating hand wheel is rotated to rotate the rotating shaft, the rotating shaft drives a gear to rotate, the gear is meshed with a rack structure, so that the mixed gas pipe is driven to vertically move downwards, the upper end of the mixed gas pipe downwards penetrates through a round hole, the middle part of the iris opening and closing device at the upper side and the middle part of the iris opening and closing device at the lower side are positioned at the lower part in a combustion chamber, then the two iris opening and closing devices are controlled to be closed by the computer, the top of the combustion chamber is plugged by the iris opening and closing device at the upper side, the middle part of the inner circle of the combustion chamber is plugged by the iris opening and closing device at the lower side, switch valves on an acetylene cylinder and an oxygen cylinder are opened, acetylene in the acetylene cylinder enters the mixed gas pipe through an acetylene injection pipe and an acetylene gas inlet pipe, oxygen in the oxygen cylinder enters the mixed gas pipe through the oxygen injection pipe and the oxygen inlet pipe, and the acetylene and the mixed gas are mixed gas in the mixed gas pipe, the igniter is controlled by a computer to start, mixed gas of acetylene and oxygen sprayed from the mixing air tap is ignited, the acetylene is combusted at the lower part in the combustion chamber, carbon dioxide and water vapor generated by the combustion reaction of the acetylene and the oxygen are discharged to the outside of the tower base through the exhaust pipe at the lower side, the lower part of the outer circumference of the combustion chamber is wound with a first high heat conduction pipe, the first high heat conduction pipe is heated by high temperature generated by the combustion of the acetylene, the first high heat conduction pipe becomes a high-temperature metal pipe, the first high heat conduction pipe conducts the heat to a second high heat conduction pipe, the temperature rise of the second high heat conduction pipe heats organic-rich rock samples in a third chamber, the heat is transferred upwards, the organic-rich rock samples in the second chamber and the first chamber are respectively heated, and the third chamber, heating and analyzing the organic-rich rock samples in the second chamber and the first chamber to generate a mixed gas containing methane;
(4) and testing and recording gas generated by heating and analyzing the organic-rich rock sample through the three infrared gas analyzers, wherein the testing and recording are the same as the step (4) of the first thermal recovery mode simulation experiment.
Compared with the prior art, the invention has outstanding substantive characteristics and remarkable progress, and particularly has the following advantages:
(1) the invention has novel and practical structure and strong operability.
(2) The pipe diameters of the first hydraulic pipe, the second hydraulic pipe and the third hydraulic pipe are sequentially reduced, and the rated pressures of the first constant pressure valve, the second constant pressure valve and the third constant pressure valve are sequentially increased, so that the pressure of the first lower pressure plate on the organic rock sample in the first cabin, the pressure of the second lower pressure plate on the organic rock sample in the second cabin and the pressure of the third lower pressure plate on the organic rock sample in the third cabin are sequentially increased, and thus the real simulation of rock strata at different underground depths is realized.
(3) The invention can realize the heating analysis of the organic-rich rock sample by three different heating modes, saves the equipment space and improves the experimental efficiency.
(4) In order to obtain more gas production rates of the organic-rich rock samples at different temperatures, a plurality of groups of simulation devices are arranged, the organic-rich rock samples in each group of simulation devices are all the organic-rich rock samples with the same or similar geological conditions, so that errors caused by the organic-rich rock samples are reduced, the computer is used for respectively controlling the first pneumatic regulating valve and the second pneumatic regulating valve of each group of simulation devices, respectively controlling the flow speed and the flow of acetylene and oxygen required by each group of simulation devices, the flow of cold water in the cold water circulating pipe is controlled by the flow regulating valve of each group of simulation devices, so that organic rock samples in each group of simulation devices are analyzed to generate gas at different temperatures, therefore, the gas yield of the organic-rich rock sample at different temperatures is recorded and compared, and the influence of three heating modes on the shale gas yield at different temperatures is favorably and deeply researched.
(5) According to the invention, the first infrared gas analyzer, the second infrared gas analyzer and the third infrared gas analyzer are all sleeved on the gas collecting pipe, the gas generated by heating and analyzing the organic-rich rock sample is conveniently collected through the gas collecting pipe, and the first infrared gas analyzer, the second infrared gas analyzer and the third infrared gas analyzer measure the methane content in the gas generated by heating and analyzing the organic-rich rock sample, so that the gas collection and the gas measurement are integrated, the gas loss and loss in the conventional connection process among different devices are reduced, and the experimental efficiency and the accuracy of results are improved.
Drawings
Fig. 1 is a front view of the present invention.
Fig. 2 is a schematic view of the internal structure of the present invention.
Fig. 3 is a schematic view of the structure of the heating apparatus of the present invention.
Fig. 4 is a schematic view of the inside of the heating apparatus in the case of the first thermal recovery mode simulation experiment according to the present invention.
Fig. 5 is a schematic view of the inside of the heating apparatus in the case of the second thermal recovery mode simulation experiment according to the present invention.
Fig. 6 is a schematic view of the inside of the heating apparatus in the case of a simulation experiment of the third thermal recovery mode according to the present invention.
Fig. 7 is a schematic structural view of the iris opening and closing device of the present invention.
Fig. 8 is a schematic structural view of the mixing tube and the rotating shaft of the present invention.
Fig. 9 is a partially enlarged view of a portion a in fig. 2.
Detailed Description
The embodiments of the present invention are further described below with reference to the drawings.
As shown in fig. 1-9, rich organic rock normal position thermal recovery mode contrast analogue means, including experiment tower and computer, the whole drum structure that is of experiment tower, the experiment tower comprises column foot 1, body of the tower 2 and top of the tower 3, the upper end of body of the tower 1 and the lower extreme integrated into one piece fixed connection of body of the tower 2, fixed connection can be dismantled with the lower extreme of top of the tower 3 to the upper end of body of the tower 2, be provided with hydraulic power device and heating device in the body of the tower 1, be provided with pressure device in the body of the tower 2, gas collection device, monitoring devices and cooling device, hydraulic power device is connected with pressure device, the computer respectively with hydraulic power device, heating device, monitoring devices and cooling device signal connection.
Hydraulic power unit includes hydraulic pump 4 and hydraulic tank 64, the equal fixed mounting of hydraulic pump 4 and hydraulic tank 64 left side portion in column foot 1, the oil inlet of hydraulic pump 4 is connected with hydraulic tank 64's oil-out, hydraulic pump 4's oil-out is connected with an oil supply pipe 5, oil supply pipe 5 passes column foot 1's left side board and stretches out column foot 1 left side, oil pipe 6 is gone up to oil supply pipe 5's left end fixedly connected with, the vertical setting of oil pipe 6 is in the left side of body of the tower 2, computer and hydraulic pump 4 signal connection.
The heating device comprises a combustion chamber 7, a mixed gas pipe 8, an igniter 9, an acetylene conveying pipe 10 and an oxygen conveying pipe 11, the combustion chamber 7 is concentrically and vertically arranged in the middle of the tower foundation 1, the combustion chamber 7 is of a cylindrical structure with an open top, the outer circumference of the combustion chamber 7 is fixedly connected with the periphery of the inner wall of the tower foundation 1 through a plurality of first cross rods (not shown), iris opening and closing devices 12 are fixedly arranged at the top and the middle of the inner circle of the combustion chamber 7, a fixed bottom plate 13 is fixedly connected to the bottom in the tower body 2, a through round hole 14 is formed in the middle of the fixed bottom plate 13, a fixed cover 15 covering the round hole 14 is fixedly arranged in the middle of the upper surface of the fixed bottom plate 13, the fixed cover 15 is of a cylindrical structure with an open bottom, the top of the fixed cover 15 is of a conical structure with a thin upper part and a thick lower part, a plurality of conical spray holes 16 with small outer parts and large inner parts are uniformly formed in the side wall of the fixed cover 15, the lower end edge of a fixed cover 15 is fixedly connected to the outer side of the edge of a round hole 14, a mixed gas pipe 8 is concentrically and vertically arranged in a combustion chamber 7, the lower end of the mixed gas pipe 8 is plugged and downwards penetrates through a bottom plate of the combustion chamber 7, the mixed gas pipe 8 is in sliding connection with the bottom plate of the combustion chamber 7, the upper end of the mixed gas pipe 8 is open and upwards penetrates through the round hole 14 to extend into the fixed cover 15, the mixed gas pipe 8 penetrates through the middle parts of two iris opening and closing devices 12, the upper end of the mixed gas pipe 8 is fixedly connected with a mixed gas nozzle 17, an igniter 9 is fixedly arranged on the mixed gas nozzle 17, the gas outlet end of an acetylene conveying pipe 10 and the gas outlet end of an oxygen conveying pipe 11 are respectively and fixedly connected to the lower side part of the mixed gas pipe 8, a rotating shaft 18 is rotatably arranged on the right side part of the outer circumference of a tower foundation 1, the rotating shaft 18 is horizontally arranged along the left-right direction, and the left end of the rotating shaft 18 extends into the tower foundation 1 and is fixedly provided with a gear 19, a rack structure 20 meshed with a gear 19 is vertically arranged on the outer wall of the rear side of the mixed gas pipe 8, the right end of a rotating shaft 18 penetrates through the right side part of the outer circumference of the tower foundation 1 rightwards and is fixedly provided with a rotating hand wheel 21, a gas pipe joint 22 is fixedly arranged on the front side part of the outer circumference of the tower foundation 1, an acetylene gas inlet pipe, an oxygen gas inlet pipe and a nitrogen gas inlet pipe are arranged on the gas pipe joint 22, two ends of the acetylene gas inlet pipe, two ends of the oxygen gas inlet pipe and two ends of the nitrogen gas inlet pipe are respectively communicated with the inside of the tower foundation 1 and the outside of the tower foundation 1, the gas inlet end of the acetylene conveying pipe 10 is fixedly connected with the inner end of the acetylene gas inlet pipe, the gas inlet end of the oxygen conveying pipe 11 is fixedly connected with the inner end of the oxygen gas inlet pipe, a nitrogen coil pipe 23 is wound on the upper part of the outer circumference of the combustion chamber 7, the gas outlet end of the nitrogen coil pipe 23 upwards penetrates through the fixed bottom plate 13 and extends into the fixed cover 15, the gas inlet end of the nitrogen coil pipe 23 is fixedly connected with the inner end of the nitrogen gas inlet pipe, the lower part of the outer circumference of the combustion chamber 7 is wound with a first high heat conduction pipe 24, the first high heat conduction pipe 24 is a closed loop coil pipe, the bottom in the tower body 2 is provided with two second high heat conduction pipes 25 which are arranged side by side from front to back, the whole appearance of the second high heat conduction pipe 25 is a door frame type structure with the front side, the back side and the lower side being opened, the fixed cover 15 is positioned in the second high heat conduction pipe 25, the lower end of the left side and the lower end of the right side of the second high heat conduction pipe 25 both downwards penetrate through the fixed bottom plate 13 and are fixedly connected with the uppermost side of the first high heat conduction pipe 24, the upper part and the lower part of the outer circumference of the combustion chamber 7 are both fixedly connected with an exhaust pipe 26 communicated with the outside, the inner end of the exhaust pipe 26 at the upper side is communicated with the upper part in the combustion chamber 7, the inner end of the exhaust pipe 26 at the lower side is communicated with the lower part in the combustion chamber 7, the outside of the tower base 1 is provided with an acetylene cylinder 27, an oxygen cylinder 28 and a nitrogen cylinder 29, the gas outlet end of the acetylene gas inlet pipe is connected with the outer end of the acetylene gas inlet pipe 30, the air outlet end of the oxygen cylinder 28 is connected with the outer end of the oxygen inlet pipe through an oxygen injection pipe 31, the air outlet end of the nitrogen cylinder 29 is connected with the outer end of the nitrogen inlet pipe through a nitrogen injection pipe 32, the acetylene injection pipe 30 is provided with a first pneumatic regulating valve 33, the oxygen injection pipe 31 is provided with a second pneumatic regulating valve 34, and the nitrogen injection pipe 32 is provided with a third pneumatic regulating valve 35;
the computer is respectively connected with the igniter 9, the iris opening and closing device 12, the first pneumatic regulating valve 33, the second pneumatic regulating valve 34 and the third pneumatic regulating valve 35 through signals.
The pressurizing device comprises a first hydraulic injection pipe joint 36, a first hydraulic pipe 37, a first constant pressure valve 38, a first upper pressurizing plate 39, a first lower pressurizing plate 40, a second hydraulic injection pipe joint 41, a second hydraulic pipe 42, a second constant pressure valve 43, a second upper pressurizing plate 44, a second lower pressurizing plate 45, a third hydraulic injection pipe joint 46, a third hydraulic pipe 47, a third constant pressure valve 48, a third upper pressurizing plate 49 and a third lower pressurizing plate 50, wherein the front side and the rear side of the inner wall of the tower body 2 are vertically and fixedly provided with rails (not shown), the first hydraulic injection pipe joint 36, the second hydraulic injection pipe joint 41 and the third hydraulic injection pipe joint 46 are fixedly arranged on the upper part of the left outer circumference part, the upper side of the middle part and the lower side of the middle part of the tower body 2 from top to bottom in sequence, the first hydraulic injection pipe joint 36, the second hydraulic injection pipe joint 41 and the third hydraulic injection pipe joint 46 are of a three-way structure, the right-end oil outlets of the first hydraulic injection pipe joint 36, the second hydraulic injection pipe joint 41 and the third hydraulic injection pipe joint 46 extend into the tower body 2, the left-end oil inlet of the first hydraulic injection pipe joint 36 is fixedly connected with the upper-end oil outlet of the upper oil pipe 6, the lower-end oil outlet of the first hydraulic injection pipe joint 36 is connected with the upper-end oil inlet of the second hydraulic injection pipe joint 41 through a first hydraulic pipe 37, a first constant pressure valve 38 is installed on the first hydraulic pipe 37, the lower-end oil outlet of the second hydraulic injection pipe joint 41 is connected with the upper-end oil inlet of the third hydraulic injection pipe joint 46 through a second hydraulic pipe 42, a second constant pressure valve 43 is installed on the second hydraulic pipe 42, the lower-end oil outlet of the third hydraulic injection pipe joint 46 is connected with the oil inlet of a hydraulic oil tank 64 through a third hydraulic pipe 47, the third constant pressure valve 48 is installed on the third hydraulic pipe 47, the first upper pressurizing plate 39, The first lower pressure plate 40, the second upper pressure plate 44, the second lower pressure plate 45, the third upper pressure plate 49 and the third lower pressure plate 50 are all horizontally arranged, the first upper pressure plate 39, the first lower pressure plate 40, the second upper pressure plate 44, the second lower pressure plate 45, the third upper pressure plate 49 and the third lower pressure plate 50 are all arranged in the tower body 2 in a sliding manner from top to bottom along two rails, a plurality of limiting upright posts 65 arranged in a circumferential array are fixedly arranged on the outer edge side parts of the lower surfaces of the first upper pressure plate 39, the second upper pressure plate 44 and the third upper pressure plate 49, the first upper pressure plate 39 and the first lower pressure plate 40 are positioned at the upper part in the tower body 2 and are as high as the first hydraulic injection pipe joint 36, the oil outlet of the first hydraulic injection pipe joint 36 is positioned between the first upper pressure plate 39 and the first lower pressure plate 40, the second upper pressure plate 44 and the second lower pressure plate 45 are positioned at the upper side of the middle part in the tower body 2 and are as high as the second hydraulic injection pipe joint 41, the right end oil outlet of the second hydraulic pressure injection pipe joint 41 is positioned between the second upper pressure plate 44 and the second lower pressure plate 45, the third upper pressure plate 49 and the third lower pressure plate 50 are positioned at the lower side of the middle part in the tower body 2 and are at the same height as the third hydraulic pressure injection pipe joint 46, the right end oil outlet of the third hydraulic pressure injection pipe joint 46 is positioned between the third upper pressure plate 49 and the third lower pressure plate 50, the cavity between the first lower pressure plate 40 and the second upper pressure plate 44 is a first chamber 51, the cavity between the second lower pressure plate 45 and the third upper pressure plate 49 is a second chamber 52, the cavity between the third lower pressure plate 50 and the fixed bottom plate 13 is a third chamber 53, the pipe diameters of the first hydraulic pipe 37, the second hydraulic pipe 42 and the third hydraulic pipe 47 are sequentially reduced, the rated pressures of the first constant pressure valve 38, the second constant pressure valve 43 and the third constant pressure valve 48 are sequentially increased, the first chamber 51, the second chamber 52 and the third chamber 53 are all filled with organic rock samples (not shown), a plurality of jacking columns 54 are fixedly arranged on the inner wall of the tower top 3 in a circumferential array mode, the lower ends of the jacking columns 54 are in jacking contact with the upper surface of the first upper pressurizing plate 39, and two radially symmetrical hooks 66 are fixedly connected to the upper surfaces of the first upper pressurizing plate 39, the first lower pressurizing plate 40, the second upper pressurizing plate 44, the second lower pressurizing plate 45, the third upper pressurizing plate 49 and the third lower pressurizing plate 50. The hook 66 is used to lift the first upper pressing plate 39, the first lower pressing plate 40, the second upper pressing plate 44, the second lower pressing plate 45, the third upper pressing plate 49, and the third lower pressing plate 50 upward out of the tower after the completion of the experiment.
The gas collecting device comprises a gas collecting pipe 55, the gas collecting pipe 55 is concentrically and vertically arranged in the tower body 2, the lower side part of the outer circumference of the gas collecting pipe 55 is fixedly connected with the lower side part of the inner wall of the tower body 2 through a plurality of second cross rods which are positioned below a third lower pressure plate 50 and are arranged in a circumferential array, the middle parts of a first upper pressure plate 39, a first lower pressure plate 40, a second upper pressure plate 44, a second lower pressure plate 45, a third upper pressure plate 49 and a third lower pressure plate 50 are all slidably sleeved on the gas collecting pipe 55, gas collecting holes (not shown) are uniformly formed in the pipe wall of the gas collecting pipe 55, a tail gas recovery hood 56 is concentrically and vertically arranged in the tower top 3, a plurality of vertical rods 67 at the top of the tail gas recovery hood 56 are fixedly connected with the top part of the inner wall of the tower top 3, the bottom of the tail gas recovery hood 56 is open, the tail gas recovery hood 56 is sleeved on the periphery of the top of the gas collecting pipe 55, the lower end edge of the tail gas recovery hood 56 is in pressure contact with the top of the upper surface of the first upper pressure plate 39, the tail gas recovery hood 56 is connected with a recovery pipe, the recovery pipe passes through the tower top 3 and is connected with an external gas storage tank, the middle part of the lower surface of the first lower pressurizing plate 40 is fixedly provided with a first infrared gas analyzer 57, the middle part of the lower surface of the second lower pressurizing plate 45 is fixedly provided with a second infrared gas analyzer 58, the middle part of the lower surface of the third lower pressurizing plate 50 is fixedly provided with a third infrared gas analyzer 59, the first infrared gas analyzer 57, the second infrared gas analyzer 58 and the third infrared gas analyzer 59 are all sleeved on the gas collecting pipe 55, and the computer is respectively in signal connection with the first infrared gas analyzer 57, the second infrared gas analyzer 58 and the third infrared gas analyzer 59.
The monitoring device comprises three groups of monitoring components which are fixedly arranged on the inner wall of the tower body 2 at intervals up and down, the three groups of monitoring components are respectively and correspondingly arranged in the first cabin 51, the second cabin 52 and the third cabin 53, each group of monitoring components comprises a temperature sensor 60 and a pressure sensor 61, and the computer is respectively in signal connection with the three temperature sensors 60 and the three pressure sensors 61;
the cooling device comprises a cooling water circulating pipe 62 and a cold water tank, a tower foundation 1, hollow interlayers are arranged inside tower walls of a tower body 2 and a tower top 3, the cooling water circulating pipe 62 is densely arranged inside the hollow interlayer of the tower wall of the tower body 2, the water inlet end and the water outlet end of the cooling water circulating pipe 62 extend out of the tower body 2, a flow regulating valve 63 is installed at the water inlet end of the cooling water circulating pipe 62, the water inlet end of the cooling water circulating pipe 62 is connected with the water outlet end of the cold water tank through a cooling water inlet pipe, the water outlet end of the cooling water circulating pipe 62 is connected with the water inlet end of the cold water tank through a cooling water outlet pipe, a water pump is installed on the cooling water inlet pipe, and a computer is in signal connection with the flow regulating valve 63 and the water pump respectively.
The iris opening and closing device 12 is of an existing conventional mechanical structure, and the specific structure and the working principle are not described in detail.
The hydraulic pump 4, the igniter 9, the first pneumatic control valve 33, the second pneumatic control valve 34, the third pneumatic control valve 35, the first infrared gas analyzer 57, the second infrared gas analyzer 58, the third infrared gas analyzer 59, the first constant pressure valve 38, the second constant pressure valve 43, the third constant pressure valve 48, the temperature sensor 60, the pressure sensor 61, the flow control valve 63, and the water pump are conventional devices.
The computer, acetylene gas inlet pipe, oxygen gas inlet pipe, nitrogen gas inlet pipe, hydraulic oil tank 64, recovery pipe, gas storage tank, cold water tank, cooling water inlet pipe and water pump are not shown in the figure.
The experimental method of the in-situ thermal recovery mode comparison simulation device for the rich-organic rock comprises three thermal recovery mode simulation experiments:
a first thermal recovery mode simulation experiment: filling the third cabin 53, the second cabin 52 and the first cabin 51 with the organic-rich rock sample in sequence, installing the whole device, and performing a thermal recovery simulation experiment on the organic-rich rock sample by adopting a direct combustion method;
the second thermal recovery mode simulation experiment: filling the third cabin 53, the second cabin 52 and the first cabin 51 with the organic rock sample with the same or similar geological conditions in sequence, installing the whole device, and carrying out thermal recovery simulation experiment on the organic rock sample by adopting a high-temperature gas heating method;
a third thermal recovery mode simulation experiment: and filling the third cabin 53, the second cabin 52 and the first cabin 51 with the organic rock sample with the same or similar geological conditions in sequence, installing the whole device, and performing thermal recovery simulation experiment on the organic rock sample by adopting a metal heat conduction heating method.
The first thermal recovery mode simulation experiment comprises the following specific steps:
(1) filling the third chamber 53, the second chamber 52, and the first chamber 51 with the organic-rich rock sample in this order: the tower top 3 is firstly opened, the first upper pressure plate 39, the first lower pressure plate 40, the second upper pressure plate 44, the second lower pressure plate 45, the third upper pressure plate 49 and the third lower pressure plate 50 are all arranged outside the tower body 2, the rich organic rock sample is filled into the tower body 2, the rich organic rock sample falls onto the fixed bottom plate 13, when the height of the rich organic rock sample is equal to the height of the third hydraulic injection pipe joint 46, the rich organic rock sample is stopped to be filled, the third lower pressure plate 50 and the third upper pressure plate 49 are sequentially sleeved on the gas collecting pipe 55 from top to bottom, the third lower pressure plate 50 and the third upper pressure plate 49 are downwards arranged in the tower body 2, the lower surface of the third lower pressure plate 50 is tightly pressed on the rich organic rock sample, the lower ends of the limit upright posts 65 on the lower surface of the third upper pressure plate 49 are supported on the upper surface of the third lower pressure plate 50, the third upper pressurizing plate 49 and the third lower pressurizing plate 50 are located at the lower side of the middle part in the tower body 2 and at the same height as the third hydraulic pressure injection pipe joint 46, the right end oil outlet of the third hydraulic pressure injection pipe joint 46 is located between the third upper pressurizing plate 49 and the third lower pressurizing plate 50, so that the third chamber 53 is filled with the organic-rich rock sample, then the organic-rich rock sample is filled into the tower body 2, the organic-rich rock sample falls onto the third upper pressurizing plate 49, when the height of the organic-rich rock sample reaches to the same height as the second hydraulic pressure injection pipe joint 41, the filling of the organic-rich rock sample is stopped, the second lower pressurizing plate 45 and the second upper pressurizing plate 44 are sequentially sleeved on the gas collecting pipe 55 from top to bottom, the second lower pressurizing plate 45 and the second upper pressurizing plate 44 are put into the tower body 2, and the lower surface of the second lower pressurizing plate 45 is tightly pressed on the organic-rich rock sample, the lower ends of the limiting columns 65 on the lower surface of the second upper pressure plate 44 are supported on the upper surface of the second lower pressure plate 45, the second upper pressure plate 44 and the second lower pressure plate 45 are positioned on the upper side of the middle part in the tower body 2 and are at the same height as the second hydraulic injection pipe joint 41, the right end oil outlet of the second hydraulic injection pipe joint 41 is positioned between the second upper pressure plate 44 and the second lower pressure plate 45, so that the second chamber 52 is filled with the organic-rich rock sample, then the organic-rich rock sample is continuously filled into the tower body 2, the organic-rich rock sample falls onto the second upper pressure plate 44, when the height of the organic-rich rock sample is equal to the height of the first hydraulic injection pipe joint 36, the filling of the organic-rich rock sample is stopped, the first lower pressure plate 40 and the first upper pressure plate 39 are sequentially sleeved from top to bottom on the gas collecting pipe 55, and the first pressure plate and the first upper pressure plate 39 are put down into the tower body 2, pressing the lower surface of the first lower pressure plate 40 against the organic-rich rock sample, supporting the lower ends of the limiting columns 65 on the lower surface of the first upper pressure plate 39 on the upper surface of the first lower pressure plate 40, so that the first upper pressure plate 39 and the first lower pressure plate 40 are positioned at the upper part in the tower body 2 and are at the same height as the first hydraulic injection pipe joint 36, and the oil outlet at the right end of the first hydraulic injection pipe joint 36 is positioned between the first upper pressure plate 39 and the first lower pressure plate 40, so that the first chamber 51 is filled with the organic-rich rock sample, then fixedly mounting the tower top 3 on the top of the tower body 2 again, sleeving the tail gas recovery hood 56 on the periphery of the top of the gas collecting pipe 55, pressing the lower end edge of the tail gas recovery hood 56 against the upper surface of the first upper pressure plate 39, and pressing the lower ends of the pressing columns 54 against the upper surface of the first upper pressure plate 39;
(2) the organic rock-rich sample is pressurized, and the real simulation of rock strata at different depths in the underground is realized: the hydraulic pump 4 is started, the hydraulic pump 4 pumps the hydraulic oil in the hydraulic oil tank 64 out and pumps the hydraulic oil into the oil supply pipe 5, the hydraulic oil is pumped into the oil supply pipe 6 again, the hydraulic oil enters the first hydraulic injection pipe joint 36 through the upper end of the oil supply pipe 6, the hydraulic oil enters a gap between the first upper pressure plate 39 and the first lower pressure plate 40 through the right end oil outlet of the first hydraulic injection pipe joint 36, the first lower pressure plate 40 downwards extrudes an organic rock sample in the first chamber 51 under the pressure action of the hydraulic oil, meanwhile, the hydraulic oil enters the first hydraulic pipe 37 through the lower end oil outlet of the first hydraulic injection pipe joint 36, the working pressure of the hydraulic pump 4 is increased through computer control, when the pressure of the hydraulic oil reaches the rated pressure of the first hydraulic pressure valve 38, the first hydraulic pressure valve 38 is opened, the hydraulic oil enters the second hydraulic injection pipe joint 41 through the first hydraulic pipe 37, hydraulic oil enters a gap between the second upper pressurizing plate 44 and the second lower pressurizing plate 45 through the right-end oil outlet of the second hydraulic injection pipe joint 41, so that the gap between the second upper pressurizing plate 44 and the second lower pressurizing plate 45 is enlarged, the second upper pressurizing plate 44 presses the organic rock sample rich in the first chamber 51 upwards under the pressure of the hydraulic oil, the second lower pressurizing plate 45 presses the organic rock sample rich in the second chamber 52 downwards under the pressure of the hydraulic oil, meanwhile, the hydraulic oil enters the second hydraulic pipe 42 through the lower-end oil outlet of the second hydraulic injection pipe joint 41, when the pressure of the hydraulic oil reaches the rated pressure of the second constant pressure valve 43, the second constant pressure valve 43 is opened, the hydraulic oil enters the third hydraulic injection pipe joint 46 through the second hydraulic pipe 42, the hydraulic oil enters the gap between the third upper pressurizing plate 49 and the third lower pressurizing plate 50 through the right-end oil outlet of the third hydraulic injection pipe joint 46, the gap between the third upper pressure plate 49 and the third lower pressure plate 50 is enlarged, the third upper pressure plate 49 presses the organic rock sample rich in organic matter in the second chamber 52 upward under the pressure of the hydraulic oil, the third lower pressure plate 50 presses the organic rock sample rich in organic matter in the third chamber 53 downward under the pressure of the hydraulic oil, meanwhile, the hydraulic oil enters the third hydraulic pipe 47 through the lower end oil outlet of the third hydraulic injection pipe joint 46, when the pressure of the hydraulic oil reaches the rated pressure of the third constant pressure valve 48, the second constant pressure valve 43 is opened, the hydraulic oil enters the hydraulic oil tank 64 through the third hydraulic pipe 47, so that the hydraulic oil circulates, and as the pipe diameters of the first hydraulic pipe 37, the second hydraulic pipe 42 and the third hydraulic pipe 47 are sequentially reduced, the rated pressures of the first constant pressure valve 38, the second constant pressure valve 43 and the third constant pressure valve 48 are sequentially increased, the pressure of the organic rock sample rich in the first chamber 51 by the first lower pressure plate 40 is sequentially increased, The pressure of the second lower compression plate 45 on the organic rock-rich sample in the second chamber 52 and the pressure of the third lower compression plate 50 on the organic rock-rich sample in the third chamber 53 are sequentially increased, so that the real simulation on rock layers with different underground depths is realized;
(3) directly burning and heating the rock sample rich in organic substances: initially, the mixing air tap 17 and the igniter 9 are both located in the fixed hood 15, the switch valves on the acetylene cylinder 27 and the oxygen cylinder 28 are opened, acetylene in the acetylene cylinder 27 enters the mixed gas pipe 8 through the acetylene injection pipe 30 and the acetylene gas inlet pipe, oxygen in the oxygen cylinder 28 enters the mixed gas pipe 8 through the oxygen injection pipe 31 and the oxygen gas inlet pipe, the acetylene and the oxygen are mixed in the mixed gas pipe 8, the igniter 9 is controlled by a computer to start, the mixed gas of the acetylene and the oxygen sprayed from the mixing air tap 17 is ignited, high-temperature flames generated by combustion of the acetylene are sprayed out through the conical spray holes 16 on the fixed hood 15, the high-temperature flames directly burn and heat the organic-rich rock samples in the third chamber 53, heat is transferred upwards, the organic-rich rock samples in the second chamber 52 and the first chamber 51 are respectively heated, and the organic-rich rock samples in the third chamber 53, the second chamber 52 and the first chamber 51 are heated and analyzed to generate the mixed gas containing methane A body;
(4) testing and recording gas generated by heating and analyzing the organic-rich rock sample through three infrared gas analyzers: starting the water pump and the first, second and third infrared gas analyzers 57, 58 and 59, the temperature sensors 60 in the first, second and third chambers 51, 52 and 53 can monitor the temperatures in the first, second and third chambers 51, 52 and 53, respectively, in real time and transmit the monitored temperatures to the computer for recording, while the pressure sensors 61 in the first, second and third chambers 51, 52 and 53 can monitor the pressures in the first, second and third chambers 51, 52 and 53, respectively, in real time and transmit the monitored pressures to the computer for recording, the cold water in the cold water tank is pumped into the cooling water circulation pipe 62 by the water pump, the cold water flows along the cooling water circulation pipe 62 and flows back to the cold water tank, and the cold water cools the interiors of the first, second and third chambers 51, 52 and 53, the flow regulating valve 63 is controlled by the computer to further control the flow of cold water, so that the temperatures in the first chamber 51, the second chamber 52 and the third chamber 53 are stabilized at the set temperature, the mixed gas in the third chamber 53 enters the gas collecting pipe 55 through the gas collecting hole on the gas collecting pipe 55 and then flows upwards along the gas collecting pipe 55 and passes through the third infrared gas analyzer 59, the third infrared gas analyzer 59 tests the methane content in the mixed gas in the third chamber 53 and transmits the measured data to the computer for recording, the mixed gas in the third chamber 53 upwards passes through the gas collecting pipe 55 and enters the second chamber 52, the mixed gas in the second chamber 52 enters the gas collecting pipe 55 through the gas collecting hole on the gas collecting pipe 55, the mixed gas in the third chamber 53 and the mixed gas in the second chamber 52 flow upwards and pass through the second infrared gas analyzer 58, and the second infrared gas analyzer 58 performs analysis on the mixed gas in the third chamber 53 and the mixed gas in the second chamber 52 The total content of methane in the third chamber 53 and the mixed gas in the second chamber 52 are upward to enter the first chamber 51 through the gas collecting pipe 55, the mixed gas in the first chamber 51 enters the gas collecting pipe 55 through the gas collecting hole on the gas collecting pipe 55, so that the mixed gas in the third chamber 53, the mixed gas in the second chamber 52 and the mixed gas in the first chamber 51 flow upward together to pass through the first infrared gas analyzer 57, the first infrared gas analyzer 57 measures the total content of methane in the mixed gas in the third chamber 53, the mixed gas in the second chamber 52 and the mixed gas in the first chamber 51, the measured data is transmitted to the computer to be recorded, the methane yield rich in organic rock samples at the set temperature is obtained, and finally the mixed gas in the third chamber 53, the mixed gas in the second chamber 52 and the mixed gas in the first chamber 51 are recorded, The mixed gas in the second chamber 52, the mixed gas in the first chamber 51 and the mixed gas generated by the combustion reaction of acetylene and oxygen are both discharged upwards to a tail gas recovery hood 56 along a gas collecting pipe 55 and enter an external gas storage tank through a recovery pipe;
in order to obtain more gas production rates of the organic-rich rock samples at different temperatures, a plurality of groups of simulation devices are arranged, the organic-rich rock samples in each group of simulation devices are all the organic-rich rock samples under the same or similar geological conditions, errors caused by the organic-rich rock samples are reduced, a computer is used for respectively controlling a first pneumatic regulating valve 33 and a second pneumatic regulating valve 34 of each group of simulation devices, the flow velocity and flow rate of acetylene and oxygen required by each group of simulation devices are respectively controlled, and the flow regulating valve 63 of each group of simulation devices is used for controlling the flow rate of cold water in a cold water circulating pipe, so that the organic-rich rock samples in each group of simulation devices are analyzed at different temperatures to produce gas, and the gas production rates of the organic-rich rock samples at different temperatures are recorded and compared.
The second thermal recovery mode simulation experiment comprises the following specific steps:
(1) filling a third chamber 53, a second chamber 52 and a first chamber 51 with organic rock samples with the same or similar geological conditions in sequence, which is the same as the step (1) of the first thermal recovery mode simulation experiment;
(2) pressurizing the rock sample rich in organic matters to realize real simulation of rock strata at different depths underground, wherein the step (2) is the same as that of the simulation experiment of the first thermal recovery mode;
(3) and preparing high-temperature gas, and heating the organic-rich rock sample by using the high-temperature gas: the opening of the two iris opening and closing devices 12 is controlled by a computer, a rotating hand wheel 21 is rotated to enable the rotating shaft 18 to rotate, the rotating shaft 18 drives a gear 19 to rotate, the gear 19 is meshed with a rack structure 20, so that the mixed gas pipe 8 is driven to vertically move downwards, the upper end of the mixed gas pipe 8 penetrates through the round hole 14 and the middle part of the iris opening and closing device 12 on the upper side downwards and is positioned at the upper part in the combustion chamber 7, then the two iris opening and closing devices 12 are controlled by the computer to be closed, the top of the combustion chamber 7 is sealed by the iris opening and closing device 12 on the upper side, the middle part of the inner circle of the iris opening and closing device 12 on the lower side is tightly attached to the outer circle of the mixed gas pipe 8 to seal the middle part of the inner circle of the combustion chamber 7, switch valves on an acetylene bottle 27 and an oxygen bottle 28 are opened, acetylene in the acetylene bottle 27 enters the mixed gas pipe 8 through an acetylene injection pipe 30 and an acetylene gas inlet pipe, and oxygen in the oxygen bottle 28 enters the mixed gas pipe 8 through an oxygen injection pipe 31 and an oxygen inlet pipe, acetylene and oxygen are mixed in a mixed gas pipe 8, an igniter 9 is controlled by a computer to be started, mixed gas of acetylene and oxygen sprayed from a mixing gas nozzle 17 is ignited, the acetylene is combusted at the upper part in a combustion chamber 7, carbon dioxide and water vapor generated by the combustion reaction of the acetylene and the oxygen are discharged to the outside of a tower foundation 1 through an exhaust pipe 26 at the upper side, a nitrogen coil 23 is wound on the upper part of the outer circumference of the combustion chamber 7, a switch valve on a nitrogen bottle 29 is opened, nitrogen in the nitrogen bottle 29 enters the nitrogen coil 23 through a nitrogen injection pipe 32 and a nitrogen inlet pipe, the flow of the nitrogen is regulated through a third pneumatic regulating valve 35, the nitrogen in the nitrogen coil 23 is heated by high temperature generated by the combustion of the acetylene, the nitrogen becomes high-temperature gas, the heated nitrogen enters a fixed cover 15 from the gas outlet end of the nitrogen coil 23 and enters a third chamber 53 through each conical spray hole 16, the heated nitrogen heats the organic-rich rock sample in the third chamber 53, the heat is transferred upwards, the organic-rich rock samples in the second chamber 52 and the first chamber 51 are heated respectively, and the organic-rich rock samples in the third chamber 53, the second chamber 52 and the first chamber 51 are heated and analyzed to generate a mixed gas containing methane;
(4) and testing and recording gas generated by heating and analyzing the organic-rich rock sample through the three infrared gas analyzers, wherein the testing and recording are the same as the step (4) of the first thermal recovery mode simulation experiment.
The third thermal recovery mode simulation experiment comprises the following specific steps:
(1) filling a third chamber 53, a second chamber 52 and a first chamber 51 with organic rock samples with the same or similar geological conditions in sequence, which is the same as the step (1) of the first thermal recovery mode simulation experiment;
(2) pressurizing the rock sample rich in organic matters to realize real simulation of rock strata at different depths underground, wherein the step (2) is the same as that of the simulation experiment of the first thermal recovery mode;
(3) and heating the first high heat conduction pipe 24 and the second high heat conduction pipe 25, and heating the organic-rich rock sample by the second high heat conduction pipe 25: the opening of the two iris opening and closing devices 12 is controlled by a computer, a rotating hand wheel 21 is rotated to enable the rotating shaft 18 to rotate, the rotating shaft 18 drives a gear 19 to rotate, the gear 19 is meshed with a rack structure 20, so that the mixed gas pipe 8 is driven to vertically move downwards, the upper end of the mixed gas pipe 8 downwards penetrates through a round hole 14, the middle part of the iris opening and closing device 12 on the upper side and the middle part of the iris opening and closing device 12 on the lower side and is positioned at the lower part in the combustion chamber 7, then the two iris opening and closing devices 12 are controlled by the computer to be closed, the top of the combustion chamber 7 is blocked by the iris opening and closing device 12 on the upper side, the middle part of the inner circle of the combustion chamber 7 is blocked by the iris opening and closing device 12 on the lower side, switch valves on an acetylene bottle 27 and an oxygen bottle 28 are opened, acetylene in the acetylene bottle 27 enters the mixed gas pipe 8 through an acetylene injection pipe 30 and an acetylene air inlet pipe, and oxygen in the oxygen bottle 28 enters the mixed gas pipe 8 through an oxygen injection pipe 31 and an oxygen inlet pipe, acetylene and oxygen are mixed in a mixed gas pipe 8, an igniter 9 is controlled by a computer to be started, mixed gas of acetylene and oxygen sprayed from a mixed gas nozzle 17 is ignited, the acetylene is combusted at the lower part in a combustion chamber 7, carbon dioxide and water vapor generated by the combustion reaction of the acetylene and the oxygen are discharged to the outside of the tower foundation 1 through an exhaust pipe 26 at the lower side, a first high heat conduction pipe 24 is wound at the lower part of the outer circumference of the combustion chamber 7, high temperature generated by the combustion of the acetylene heats the first high heat conduction pipe 24, the first high heat conduction pipe 24 becomes a high-temperature metal pipe, the first high heat conduction pipe 24 conducts heat to a second high heat conduction pipe 25, the temperature rise of the second high heat conduction pipe 25 heats organic-rich rock samples in a third chamber 53, the heat is transferred upwards, the organic-rich rock samples in the second chamber 52 and the first chamber 51 are respectively heated, and the third chamber 53, The organic-rich rock samples in the second chamber 52 and the first chamber 51 are heated and analyzed to generate a mixed gas containing methane;
(4) and testing and recording gas generated by heating and analyzing the organic-rich rock sample through the three infrared gas analyzers, wherein the testing and recording are the same as the step (4) of the first thermal recovery mode simulation experiment.
The above embodiments are merely to illustrate rather than to limit the technical solutions of the present invention, and although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that; modifications and equivalents may be made thereto without departing from the spirit and scope of the invention and it is intended to cover in the claims the invention as defined in the appended claims.
Claims (6)
1. Rich organic rock normal position thermal recovery mode contrast analogue means, its characterized in that: the experimental tower is integrally of a cylinder structure and comprises a tower foundation, a tower body and a tower top, wherein the upper end of the tower foundation is fixedly connected with the lower end of the tower body in an integrated manner, the upper end of the tower body is detachably and fixedly connected with the lower end of the tower top, a hydraulic power device and a heating device are arranged in the tower foundation, a pressurizing device, a gas collecting device, a monitoring device and a cooling device are arranged in the tower body, the hydraulic power device is connected with the pressurizing device, and the computer is in signal connection with the hydraulic power device, the heating device, the monitoring device and the cooling device respectively;
the heating device comprises a combustion chamber, a mixed gas pipe, an igniter, an acetylene conveying pipe and an oxygen conveying pipe, wherein the combustion chamber is concentrically and vertically arranged in the middle part of the tower footing and is of a cylindrical structure with an open top, the outer circumference of the combustion chamber is fixedly connected with the periphery of the inner wall of the tower footing through a plurality of first cross rods, iris opening and closing devices are fixedly arranged at the top part and the middle part of the inner circle of the combustion chamber, a fixed bottom plate is fixedly connected to the bottom in the tower body, a through round hole is formed in the middle part of the fixed bottom plate, a fixed cover covering the round hole is fixedly arranged in the middle part of the upper surface of the fixed bottom plate and is of a cylindrical structure with an open bottom, the top part of the fixed cover is of a conical structure with a thin upper part and a thick lower part, a plurality of conical spray holes with small outer part and large inner part are uniformly formed in the side wall of the fixed cover, the lower end edge of the fixed cover is fixedly connected to the outer side of the round hole, the mixed gas pipe is concentrically and vertically arranged in the combustion chamber, the lower end of the mixed gas pipe is blocked and downwards penetrates through the bottom plate of the combustion chamber, the mixed gas pipe is connected with the bottom plate of the combustion chamber in a sliding manner, the upper end of the mixed gas pipe is open and upwards penetrates through a round hole to extend into the fixing cover, the mixed gas pipe penetrates through the middle parts of the two iris opening and closing devices, the upper end of the mixed gas pipe is fixedly connected with a mixed gas nozzle, an igniter is fixedly arranged on the mixed gas nozzle, the gas outlet end of an acetylene conveying pipe and the gas outlet end of an oxygen conveying pipe are respectively and fixedly connected with the lower side part of the mixed gas pipe, the right side part of the outer circumference of the tower base is rotatably provided with a rotating shaft which is horizontally arranged along the left and right direction, the left end of the rotating shaft extends into the tower base and is fixedly provided with a gear, the outer wall of the rear side of the mixed gas pipe is vertically provided with a rack structure meshed with the gear, the right end of the rotating shaft penetrates through the right side part of the outer circumference of the tower base and is fixedly provided with a rotating hand wheel, the front side part of the outer circumference of the tower base is fixedly provided with a gas pipe joint, the gas pipe joint is provided with an acetylene gas inlet pipe, an oxygen gas inlet pipe and a nitrogen gas inlet pipe, the two ends of the acetylene gas inlet pipe, the two ends of the oxygen gas inlet pipe and the two ends of the nitrogen gas inlet pipe are respectively communicated with the inside of the tower foundation and the outside of the tower foundation, the gas inlet end of the acetylene gas conveying pipe is fixedly connected with the inner end of the acetylene gas inlet pipe, the gas inlet end of the oxygen gas conveying pipe is fixedly connected with the inner end of the oxygen gas inlet pipe, the upper part of the outer circumference of the combustion chamber is wound with a nitrogen coil, the gas outlet end of the nitrogen coil upwards penetrates through the fixed bottom plate and extends into the fixed cover, the gas inlet end of the nitrogen coil is fixedly connected with the inner end of the nitrogen gas inlet pipe, the lower part of the outer circumference of the combustion chamber is wound with a first high heat conduction pipe, the first high heat conduction pipe is a closed loop coil, the inner bottom of the tower body is provided with two second high heat conduction pipes which are arranged side by side, and the whole appearance of the door frame structure with an opening at the front side, the rear side and the lower side, the fixed cover is positioned inside the second high heat conduction pipe, the lower end of the left side and the lower end of the right side of the second high heat conduction pipe both downwards penetrate through the fixed bottom plate and are fixedly connected with the uppermost side of the first high heat conduction pipe, the upper part of the outer circumference and the lower part of the outer circumference of the combustion chamber are both fixedly connected with an exhaust pipe communicated with the outside, the inner end of the exhaust pipe at the upper side is communicated with the upper part in the combustion chamber, the inner end of the exhaust pipe at the lower side is communicated with the lower part in the combustion chamber, an acetylene cylinder, an oxygen cylinder and a nitrogen cylinder are arranged outside the tower foundation, the gas outlet end of the acetylene cylinder is connected with the outer end of the acetylene gas inlet pipe through an acetylene injection pipe, the gas outlet end of the oxygen cylinder is connected with the outer end of the oxygen gas inlet pipe through an oxygen injection pipe, the gas outlet end of the nitrogen cylinder is connected with the outer end of the nitrogen gas inlet pipe through a nitrogen injection pipe, a first pneumatic regulating valve is arranged on the acetylene injection pipe, and a second pneumatic regulating valve is arranged on the oxygen injection pipe, a third pneumatic regulating valve is arranged on the nitrogen injection pipe;
the computer is respectively in signal connection with the igniter, the iris opening and closing device, the first pneumatic regulating valve, the second pneumatic regulating valve and the third pneumatic regulating valve;
the pressurizing device comprises a first hydraulic injection pipe joint, a first hydraulic pipe, a first constant pressure valve, a first upper pressurizing plate, a first lower pressurizing plate, a second hydraulic injection pipe joint, a second hydraulic pipe, a second constant pressure valve, a second upper pressurizing plate, a second lower pressurizing plate, a third hydraulic injection pipe joint, a third hydraulic pipe, a third constant pressure valve, a third upper pressurizing plate and a third lower pressurizing plate, wherein tracks are vertically and fixedly arranged on the front side and the rear side of the inner wall of the tower body, the first hydraulic injection pipe joint, the second hydraulic injection pipe joint and the third hydraulic injection pipe joint are sequentially and fixedly arranged on the upper part of the left side part of the outer circumference of the tower body, the upper side of the middle part and the lower side of the middle part from top to bottom, the first hydraulic injection pipe joint, the second hydraulic injection pipe joint and the third hydraulic injection pipe joint are of a three-way structure, oil outlets at the right ends of the first hydraulic injection pipe joint, the second hydraulic injection pipe joint and the third hydraulic injection pipe joint extend into the tower body, the left end oil inlet of a first hydraulic injection pipe joint is fixedly connected with the upper end oil outlet of an upper oil pipe, the lower end oil outlet of the first hydraulic injection pipe joint is connected with the upper end oil inlet of a second hydraulic injection pipe joint through a first hydraulic pipe, a first constant pressure valve is installed on the first hydraulic pipe, the lower end oil outlet of the second hydraulic injection pipe joint is connected with the upper end oil inlet of a third hydraulic injection pipe joint through a second hydraulic pipe, a second constant pressure valve is installed on the second hydraulic pipe, the lower end oil outlet of the third hydraulic injection pipe joint is connected with the oil inlet of a hydraulic oil tank through a third hydraulic pipe, a third constant pressure valve is installed on the third hydraulic pipe, a first upper pressure plate, a first lower pressure plate, a second upper pressure plate, a second lower pressure plate, a third upper pressure plate and a third lower pressure plate are all horizontally arranged, and the first upper pressure plate, the first lower pressure plate, the second upper pressure plate and the third lower pressure plate are all horizontally arranged, The second lower pressure plate, the third upper pressure plate and the third lower pressure plate are arranged in the tower body in a sliding manner from top to bottom along two tracks, the outer edge side parts of the lower surfaces of the first upper pressure plate, the second upper pressure plate and the third upper pressure plate are fixedly provided with a plurality of limit upright posts arranged in a circumferential array manner, the first upper pressure plate and the first lower pressure plate are positioned at the upper part in the tower body and are as high as the first hydraulic injection pipe joint, the oil outlet at the right end of the first hydraulic injection pipe joint is positioned between the first upper pressure plate and the first lower pressure plate, the second upper pressure plate and the second lower pressure plate are positioned at the upper side of the middle part in the tower body and are as high as the second hydraulic injection pipe joint, the oil outlet at the right end of the second hydraulic injection pipe joint is positioned between the second upper pressure plate and the second lower pressure plate, the third upper pressure plate and the third lower pressure plate are positioned at the lower side of the middle part in the tower body and are as high as the third hydraulic injection pipe joint, the right end oil outlet of the third hydraulic injection pipe joint is positioned between the third upper pressure plate and the third lower pressure plate, the cavity between the first lower pressure plate and the second upper pressure plate is a first cabin, the cavity between the second lower pressure plate and the third upper pressure plate is a second cabin, the cavity between the third lower pressure plate and the fixed bottom plate is a third cabin, the pipe diameters of the first hydraulic pipe, the second hydraulic pipe and the third hydraulic pipe are sequentially reduced, the rated pressures of the first constant pressure valve, the second constant pressure valve and the third constant pressure valve are sequentially increased, the first cabin, the second cabin and the third cabin are all filled with organic rock samples, a plurality of jacking columns are fixedly arranged on the circumferential array of the inner wall of the tower top, the lower ends of the jacking columns are all in jacking contact with the upper surface of the first upper pressure plate, the upper surfaces of the first upper pressurizing plate, the first lower pressurizing plate, the second upper pressurizing plate, the second lower pressurizing plate, the third upper pressurizing plate and the third lower pressurizing plate are fixedly connected with two radially symmetrical hooks;
the gas collecting device comprises a gas collecting pipe, the gas collecting pipe is concentrically and vertically arranged in the tower body, the lower side part of the outer circumference of the gas collecting pipe is fixedly connected with the lower side part of the inner wall of the tower body through a plurality of second cross rods which are positioned below a third lower pressure plate and are arranged in a circumferential array, the middle parts of a first upper pressure plate, a first lower pressure plate, a second upper pressure plate, a second lower pressure plate, a third upper pressure plate and a third lower pressure plate are all sleeved on the gas collecting pipe in a sliding manner, gas collecting holes are uniformly formed in the pipe wall of the gas collecting pipe, a tail gas recovery cover is concentrically and vertically arranged in the tower top, a plurality of vertical rods at the top of the tail gas recovery cover are fixedly connected with the top of the inner wall of the tower top, the bottom of the tail gas recovery cover is open, the tail gas recovery cover is sleeved on the periphery of the top of the gas collecting pipe, the lower end edge of the tail gas recovery cover is in top pressure contact with the upper surface of the first upper pressure plate, and the tail gas recovery pipe is connected with the tail gas recovery cover, the recovery pipe penetrates through the tower top to be connected with an external gas storage tank, a first infrared gas analyzer is fixedly arranged in the middle of the lower surface of the first lower pressurizing plate, a second infrared gas analyzer is fixedly arranged in the middle of the lower surface of the second lower pressurizing plate, a third infrared gas analyzer is fixedly arranged in the middle of the lower surface of the third lower pressurizing plate, the first infrared gas analyzer, the second infrared gas analyzer and the third infrared gas analyzer are all sleeved on the gas collecting pipe, and the computer is respectively in signal connection with the first infrared gas analyzer, the second infrared gas analyzer and the third infrared gas analyzer;
the monitoring device comprises three groups of monitoring components which are fixedly arranged on the inner wall of the tower body at intervals up and down, the three groups of monitoring components are respectively and correspondingly arranged in the first cabin, the second cabin and the third cabin, each group of monitoring components comprises a temperature sensor and a pressure sensor, and the computer is respectively in signal connection with the three temperature sensors and the three pressure sensors;
the cooling device comprises a cooling water circulating pipe and a cold water tank, a tower foundation, hollow interlayers are arranged inside a tower wall of a tower body and a tower top, the cooling water circulating pipe is densely distributed inside the hollow interlayers of the tower wall of the tower body, the water inlet end and the water outlet end of the cooling water circulating pipe extend out of the tower body, a flow regulating valve is installed at the water inlet end of the cooling water circulating pipe, the water inlet end of the cooling water circulating pipe is connected with the water outlet end of the cold water tank through a cooling water inlet pipe, the water outlet end of the cooling water circulating pipe is connected with the water inlet end of the cold water tank through a cooling water outlet pipe, a water pump is installed on the cooling water inlet pipe, and a computer is in signal connection with the flow regulating valve and the water pump respectively.
2. The in-situ thermal recovery mode contrast simulation device for the organic-rich rock according to claim 1, wherein: the hydraulic power device comprises a hydraulic pump and a hydraulic oil tank, wherein the hydraulic pump and the hydraulic oil tank are fixedly arranged at the left side part in the tower footing, an oil inlet of the hydraulic pump is connected with an oil outlet of the hydraulic oil tank, the oil outlet of the hydraulic pump is connected with an oil supply pipe, the oil supply pipe penetrates through the left side plate of the tower footing leftward and extends out of the tower footing, the left end of the oil supply pipe is fixedly connected with an oil pipe, the oil pipe is vertically arranged on the left side of the tower body, and a computer is in signal connection with the hydraulic pump.
3. The experimental method of the organic-rich rock in-situ thermal recovery mode contrast simulation device according to claim 2, wherein: the method comprises three thermal recovery mode simulation experiments:
a first thermal recovery mode simulation experiment: filling the third cabin, the second cabin and the first cabin with the organic-rich rock sample in sequence, installing the whole device, and performing a thermal recovery simulation experiment on the organic-rich rock sample by adopting a direct combustion method;
the second thermal recovery mode simulation experiment: filling the third cabin, the second cabin and the first cabin with organic rock samples with the same or similar geological conditions in sequence, installing the whole device, and carrying out thermal recovery simulation experiments on the organic rock samples by adopting a high-temperature gas heating method;
a third thermal recovery mode simulation experiment: and filling the third cabin, the second cabin and the first cabin with the organic rock sample with the same or similar geological conditions in sequence, installing the whole device, and carrying out thermal recovery simulation experiment on the organic rock sample by adopting a metal heat conduction heating method.
4. The experimental method of the organic-rich rock in-situ thermal recovery mode contrast simulation device according to claim 3, characterized in that: the first thermal recovery mode simulation experiment comprises the following specific steps:
(1) filling the third cabin, the second cabin and the first cabin with the organic-rich rock sample in sequence: firstly, opening the tower top, initially arranging a first upper pressure plate, a first lower pressure plate, a second upper pressure plate, a second lower pressure plate, a third upper pressure plate and a third lower pressure plate outside the tower body, filling the rich organic rock sample into the tower body, enabling the rich organic rock sample to fall onto a fixed bottom plate, stopping filling the rich organic rock sample when the height of the rich organic rock sample is equal to the height of a third hydraulic injection pipe joint, sequentially sleeving the third lower pressure plate and the third upper pressure plate on a gas collecting pipe from top to bottom, downwards arranging the third lower pressure plate and the third upper pressure plate into the tower body, enabling the lower surface of the third lower pressure plate to be tightly pressed on the rich organic rock sample, supporting the lower end of each limit upright column on the lower surface of the third upper pressure plate on the upper surface of the third lower pressure plate, and enabling the third upper pressure plate and the third lower pressure plate to be positioned at the lower side of the middle part in the tower body and to be as high as the third hydraulic injection pipe joint, the oil outlet at the right end of the third hydraulic injection pipe joint is positioned between the third upper pressure plate and the third lower pressure plate, so that the third chamber is filled with the organic rock sample, then the organic rock sample is continuously filled into the tower body, the organic rock sample falls onto the third upper pressure plate, when the height of the organic rock sample reaches the height of the second hydraulic injection pipe joint, the filling of the organic rock sample is stopped, the second lower pressure plate and the second upper pressure plate are sequentially sleeved on the gas collecting pipe from top to bottom, the second lower pressure plate and the second upper pressure plate are downwards placed into the tower body, the lower surface of the second lower pressure plate is tightly pressed on the organic rock sample, the lower end of each limit upright column on the lower surface of the second upper pressure plate is supported on the upper surface of the second lower pressure plate, and the second upper pressure plate and the second lower pressure plate are positioned at the upper side of the middle part in the tower body and have the same height as the second hydraulic injection pipe joint, the right end oil outlet of the second hydraulic injection pipe joint is positioned between the second upper pressure plate and the second lower pressure plate, so that the second cabin is filled with the organic rock sample, then the tower body is continuously filled with the organic rock sample, the organic rock sample falls onto the second upper pressure plate, when the height of the organic rock sample is equal to that of the first hydraulic injection pipe joint, the filling of the organic rock sample is stopped, the first lower pressure plate and the first upper pressure plate are sequentially sleeved on the gas collecting pipe from top to bottom, the first pressure plate and the first upper pressure plate are placed into the tower body downwards, the lower surface of the first lower pressure plate is tightly pressed on the organic rock sample, the lower ends of the limit columns on the lower surface of the first upper pressure plate are supported on the upper surface of the first lower pressure plate, and the first upper pressure plate and the first lower pressure plate are positioned at the upper part in the tower body and are as high as the first hydraulic injection pipe joint, an oil outlet at the right end of the first hydraulic injection pipe joint is positioned between the first upper pressure plate and the first lower pressure plate, so that an organic rock sample is filled in the first cabin, then the top of the tower is fixedly installed at the top of the tower body again, the tail gas recovery cover is sleeved on the periphery of the top of the gas collecting pipe, the lower end edge of the tail gas recovery cover is in top pressure contact with the upper surface of the first upper pressure plate, and the lower ends of the top pressure upright columns are also in top pressure contact with the upper surface of the first upper pressure plate;
(2) the organic rock-rich sample is pressurized, and the real simulation of rock strata at different depths in the underground is realized: starting a hydraulic pump, pumping hydraulic oil in a hydraulic oil tank out by the hydraulic pump and pumping the hydraulic oil into an oil supply pipe, enabling the hydraulic oil to enter a first hydraulic injection pipe joint through the upper end of the oil supply pipe, enabling the hydraulic oil to enter a gap between a first upper pressure plate and a first lower pressure plate through an oil outlet at the right end of the first hydraulic injection pipe joint, enabling the first lower pressure plate to downwards extrude an organic rock sample rich in the first cabin under the pressure action of the hydraulic oil, enabling the hydraulic oil to enter a first hydraulic pipe through an oil outlet at the lower end of the first hydraulic injection pipe joint, increasing the working pressure of the hydraulic pump through computer control, opening a first constant pressure valve when the pressure of the hydraulic oil reaches the rated pressure of the first constant pressure valve, enabling the hydraulic oil to enter a second hydraulic injection pipe joint through the first hydraulic pipe, enabling the hydraulic oil to enter a gap between the second upper pressure plate and the second lower pressure plate through an oil outlet at the right end of the second hydraulic injection pipe joint, the gap between the second upper pressure plate and the second lower pressure plate is enlarged, the second upper pressure plate upwards extrudes the organic rock sample rich in the first chamber under the pressure action of the hydraulic oil, the second lower pressure plate downwards extrudes the organic rock sample rich in the second chamber under the pressure action of the hydraulic oil, meanwhile, the hydraulic oil enters a second hydraulic pipe through an oil outlet at the lower end of a second hydraulic injection pipe joint, when the pressure of the hydraulic oil reaches the rated pressure of the second constant pressure valve, the second constant pressure valve is opened, the hydraulic oil enters a third hydraulic injection pipe joint through the second hydraulic pipe, the hydraulic oil enters the gap between the third upper pressure plate and the third lower pressure plate through an oil outlet at the right end of the third hydraulic injection pipe joint, the gap between the third upper pressure plate and the third lower pressure plate is enlarged, and the third upper pressure plate upwards extrudes the organic rock sample rich in the second chamber under the pressure action of the hydraulic oil, the third lower pressure plate extrudes the organic rock sample in the third chamber downwards under the pressure action of the hydraulic oil, meanwhile, the hydraulic oil enters the third hydraulic pipe through the oil outlet at the lower end of the third hydraulic injection pipe joint, when the pressure of the hydraulic oil reaches the rated pressure of the third constant pressure valve, the second constant pressure valve is opened, the hydraulic oil enters the hydraulic oil tank through the third hydraulic pipe, so that the hydraulic oil can circulate, because the pipe diameters of the first hydraulic pipe, the second hydraulic pipe and the third hydraulic pipe are sequentially reduced, the rated pressures of the first constant pressure valve, the second constant pressure valve and the third constant pressure valve are sequentially increased, the pressure of the first lower pressure plate on the organic rock sample in the first chamber, the pressure of the second lower pressure plate on the organic rock sample in the second chamber and the pressure of the third lower pressure plate on the organic rock sample in the third chamber are sequentially increased, and thus, realizing real simulation of rock strata at different depths in the underground;
(3) directly burning and heating the rock sample rich in organic substances: the mixing air tap and the igniter are both positioned in the fixed cover at the beginning, the switch valves on the acetylene cylinder and the oxygen cylinder are opened, the acetylene in the acetylene cylinder enters the mixed gas pipe through the acetylene injection pipe and the acetylene gas inlet pipe, the oxygen in the oxygen cylinder enters the mixed gas pipe through the oxygen injection pipe and the oxygen gas inlet pipe, the acetylene and the oxygen are mixed in the mixed gas pipe, the igniter is controlled by a computer to start, mixed gas of acetylene and oxygen sprayed from the mixing air tap is ignited, high-temperature flame generated by acetylene combustion is sprayed out through each conical spray hole on the fixing cover, the high-temperature flame directly burns and heats the organic-rich rock sample in the third cabin, heat is transferred upwards, the organic-rich rock samples in the second cabin and the first cabin are respectively heated, and the organic-rich rock samples in the third cabin, the second cabin and the first cabin are heated and analyzed to generate mixed gas containing methane;
(4) testing and recording gas generated by heating and analyzing the organic-rich rock sample through three infrared gas analyzers: starting the water pump and the first infrared gas analyzer, the second infrared gas analyzer and the third infrared gas analyzer, wherein the temperature sensors in the first cabin, the second cabin and the third cabin can respectively monitor the temperature in the first cabin, the second cabin and the third cabin in real time and transmit the monitored temperature to the computer for recording, meanwhile, the pressure sensors in the first cabin, the second cabin and the third cabin can respectively monitor the pressure in the first cabin, the second cabin and the third cabin in real time and transmit the monitored pressure to the computer for recording, cold water in the cold water tank is pumped into the cooling water circulating pipe through the water pump, the cold water flows along the cooling water circulating pipe and flows back to the cold water tank, the cold water cools the interiors of the first cabin, the second cabin and the third cabin, the flow regulating valve is controlled through the computer so as to further control the flow of the cold water, the temperature in the first cabin, the second cabin and the third cabin is stabilized at a set temperature, the mixed gas in the third cabin enters a gas collecting pipe through a gas collecting hole on the gas collecting pipe and then flows upwards along the gas collecting pipe to pass through a third infrared gas analyzer, the third infrared gas analyzer tests the methane content in the mixed gas in the third cabin and transmits the measured data to a computer for recording, the mixed gas in the third cabin upwards enters the second cabin through the gas collecting pipe, the mixed gas in the second cabin enters the gas collecting pipe through the gas collecting hole on the gas collecting pipe, the mixed gas in the third cabin and the mixed gas in the second cabin flow upwards through the second infrared gas analyzer together, the second infrared gas analyzer tests the total methane content in the mixed gas in the third cabin and the mixed gas in the second cabin and transmits the measured data to the computer for recording, the mixed gas in the third cabin and the mixed gas in the second cabin upwards enter the first cabin through the gas collecting pipe, the mixed gas in the first cabin enters the gas collecting pipe through the gas collecting hole on the gas collecting pipe, so that the mixed gas in the third cabin, the mixed gas in the second cabin and the mixed gas in the first cabin upwards flow through the first infrared gas analyzer together, the first infrared gas analyzer tests the total content of methane in the mixed gas in the third cabin, the mixed gas in the second cabin and the mixed gas in the first cabin, the measured data are transmitted to the computer for recording, further the methane gas production rate of the organic rock sample at the set temperature is obtained, and finally the mixed gas in the third cabin, the mixed gas in the second cabin, the mixed gas in the first cabin and the mixed gas generated by the combustion reaction of acetylene and oxygen are upwards discharged into the tail gas recovery hood along the gas collecting pipe, then enters an external gas storage tank through a recovery pipe;
in order to obtain more gas production rates of the organic-rich rock samples at different temperatures, a plurality of groups of simulation devices are arranged, the organic-rich rock samples in each group of simulation devices are all the organic-rich rock samples under the same or similar geological conditions, errors caused by the organic-rich rock samples are reduced, a computer is used for respectively controlling a first pneumatic regulating valve and a second pneumatic regulating valve of each group of simulation devices, the flow rate and flow of acetylene and oxygen required by each group of simulation devices are respectively controlled, the flow regulating valve of each group of simulation devices is used for controlling the flow rate of cold water in a cold water circulating pipe, so that the organic-rich rock samples in each group of simulation devices are analyzed to produce gas at different temperatures, and the gas production rates of the organic-rich rock samples at different temperatures are recorded and compared.
5. The experimental method of the organic-rich rock in-situ thermal recovery mode contrast simulation device according to claim 4, wherein: the second thermal recovery mode simulation experiment comprises the following specific steps:
(1) filling a third cabin, a second cabin and a first cabin with organic rock samples with the same or similar geological conditions in sequence, and the steps are the same as the step (1) of the first thermal recovery mode simulation experiment;
(2) pressurizing the rock sample rich in organic matters to realize real simulation of rock strata at different depths underground, wherein the step (2) is the same as that of the simulation experiment of the first thermal recovery mode;
(3) and preparing high-temperature gas, and heating the organic-rich rock sample by using the high-temperature gas: the opening of the two iris opening and closing devices is controlled by a computer, a rotating hand wheel is rotated to enable the rotating shaft to rotate, the rotating shaft drives a gear to rotate, the gear is meshed with a rack structure, so that the mixed gas pipe is driven to vertically move downwards, the upper end of the mixed gas pipe penetrates through the circular hole and the middle part of the iris opening and closing device on the upper side and is positioned on the upper part in the combustion chamber, then the two iris opening and closing devices are controlled to be closed by the computer, the top of the combustion chamber is plugged by the iris opening and closing device on the upper side, the middle part of the inner circle of the combustion chamber is plugged by tightly attaching the inner circle of the iris opening and closing device on the lower side and the outer circle of the mixed gas pipe, the switch valves on the acetylene cylinder and the oxygen cylinder are opened, acetylene in the acetylene cylinder enters the mixed gas pipe through the acetylene injection pipe and the acetylene gas inlet pipe, oxygen in the oxygen cylinder enters the mixed gas pipe through the oxygen injection pipe and the oxygen inlet pipe, and the acetylene and the mixed gas are mixed gas in the mixed gas pipe, the igniter is controlled by a computer to be started, the mixed gas of acetylene and oxygen sprayed from the mixing air tap is ignited, the acetylene is combusted at the upper part in the combustion chamber, carbon dioxide and water vapor generated by the combustion reaction of the acetylene and the oxygen are discharged to the outside of the tower footing through the exhaust pipe at the upper side, the upper part of the outer circumference of the combustion chamber is wound with a nitrogen coil pipe, a switch valve on the nitrogen bottle is opened, the nitrogen in the nitrogen bottle enters the nitrogen coil pipe through a nitrogen injection pipe and a nitrogen inlet pipe, the flow of the nitrogen is regulated through a third pneumatic regulating valve, the nitrogen in the nitrogen coil pipe is heated by the high temperature generated by the combustion of the acetylene to become high-temperature gas, the heated nitrogen enters a fixed cover from the air outlet end of the nitrogen coil pipe and enters a third chamber through each conical spray hole, the heated nitrogen heats the organic rock sample rich in the third chamber, and the heat is transferred upwards, heating the organic-rich rock samples in the second chamber and the first chamber respectively, and heating and analyzing the organic-rich rock samples in the third chamber, the second chamber and the first chamber to generate a mixed gas containing methane;
(4) and testing and recording gas generated by heating and analyzing the organic-rich rock sample through the three infrared gas analyzers, wherein the testing and recording are the same as the step (4) of the first thermal recovery mode simulation experiment.
6. The experimental method of the organic-rich rock in-situ thermal recovery mode contrast simulation device according to claim 5, characterized in that: the third thermal recovery mode simulation experiment comprises the following specific steps:
(1) filling a third cabin, a second cabin and a first cabin with organic rock samples with the same or similar geological conditions in sequence, and the steps are the same as the step (1) of the first thermal recovery mode simulation experiment;
(2) pressurizing the rock sample rich in organic matters to realize real simulation of rock strata at different depths underground, wherein the step (2) is the same as that of the simulation experiment of the first thermal recovery mode;
(3) the high heat pipe heating of first high heat pipe and second makes the high heat pipe of second heat rich organic rock sample: the opening of the two iris opening and closing devices is controlled by a computer, a rotating hand wheel is rotated to rotate the rotating shaft, the rotating shaft drives a gear to rotate, the gear is meshed with a rack structure, so that the mixed gas pipe is driven to vertically move downwards, the upper end of the mixed gas pipe downwards penetrates through a round hole, the middle part of the iris opening and closing device at the upper side and the middle part of the iris opening and closing device at the lower side are positioned at the lower part in a combustion chamber, then the two iris opening and closing devices are controlled to be closed by the computer, the top of the combustion chamber is plugged by the iris opening and closing device at the upper side, the middle part of the inner circle of the combustion chamber is plugged by the iris opening and closing device at the lower side, switch valves on an acetylene cylinder and an oxygen cylinder are opened, acetylene in the acetylene cylinder enters the mixed gas pipe through an acetylene injection pipe and an acetylene gas inlet pipe, oxygen in the oxygen cylinder enters the mixed gas pipe through the oxygen injection pipe and the oxygen inlet pipe, and the acetylene and the mixed gas are mixed gas in the mixed gas pipe, the igniter is controlled by a computer to start, mixed gas of acetylene and oxygen sprayed from the mixing air tap is ignited, the acetylene is combusted at the lower part in the combustion chamber, carbon dioxide and water vapor generated by the combustion reaction of the acetylene and the oxygen are discharged to the outside of the tower base through the exhaust pipe at the lower side, the lower part of the outer circumference of the combustion chamber is wound with a first high heat conduction pipe, the first high heat conduction pipe is heated by high temperature generated by the combustion of the acetylene, the first high heat conduction pipe becomes a high-temperature metal pipe, the first high heat conduction pipe conducts the heat to a second high heat conduction pipe, the temperature rise of the second high heat conduction pipe heats organic-rich rock samples in a third chamber, the heat is transferred upwards, the organic-rich rock samples in the second chamber and the first chamber are respectively heated, and the third chamber, heating and analyzing the organic-rich rock samples in the second chamber and the first chamber to generate a mixed gas containing methane;
(4) and testing and recording gas generated by heating and analyzing the organic-rich rock sample through the three infrared gas analyzers, wherein the testing and recording are the same as the step (4) of the first thermal recovery mode simulation experiment.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104181283A (en) * | 2014-09-05 | 2014-12-03 | 河南理工大学 | Method and device for determining radon gas separation in load coal fracture process |
| CN108872529A (en) * | 2018-04-12 | 2018-11-23 | 中国石油大学(北京) | For measuring shale rupture methane lost imitative experimental appliance and its method |
| CN109555519A (en) * | 2019-01-08 | 2019-04-02 | 华侨大学 | Hole wall destroys the pilot system and method for situation when simulating exploitation of gas hydrates |
| CN110306952A (en) * | 2019-07-09 | 2019-10-08 | 燕山大学 | A kind of experimental rig and test method of voltage drop method auxiliary carbon dioxide displacer gas hydrate |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104181283A (en) * | 2014-09-05 | 2014-12-03 | 河南理工大学 | Method and device for determining radon gas separation in load coal fracture process |
| CN108872529A (en) * | 2018-04-12 | 2018-11-23 | 中国石油大学(北京) | For measuring shale rupture methane lost imitative experimental appliance and its method |
| CN109555519A (en) * | 2019-01-08 | 2019-04-02 | 华侨大学 | Hole wall destroys the pilot system and method for situation when simulating exploitation of gas hydrates |
| CN110306952A (en) * | 2019-07-09 | 2019-10-08 | 燕山大学 | A kind of experimental rig and test method of voltage drop method auxiliary carbon dioxide displacer gas hydrate |
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