CN113218989A - Hydrocarbon source rock thermal simulation hydrocarbon generation and discharge experiment system and method - Google Patents
Hydrocarbon source rock thermal simulation hydrocarbon generation and discharge experiment system and method Download PDFInfo
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- CN113218989A CN113218989A CN202110579188.XA CN202110579188A CN113218989A CN 113218989 A CN113218989 A CN 113218989A CN 202110579188 A CN202110579188 A CN 202110579188A CN 113218989 A CN113218989 A CN 113218989A
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- 229930195733 hydrocarbon Natural products 0.000 title claims abstract description 84
- 150000002430 hydrocarbons Chemical class 0.000 title claims abstract description 84
- 239000004215 Carbon black (E152) Substances 0.000 title claims abstract description 82
- 239000011435 rock Substances 0.000 title claims abstract description 54
- 238000002474 experimental method Methods 0.000 title claims abstract description 43
- 238000004088 simulation Methods 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000010438 heat treatment Methods 0.000 claims abstract description 19
- 238000012544 monitoring process Methods 0.000 claims abstract description 7
- 239000007789 gas Substances 0.000 claims description 116
- 238000003860 storage Methods 0.000 claims description 36
- 239000007788 liquid Substances 0.000 claims description 31
- 238000000926 separation method Methods 0.000 claims description 22
- 238000004140 cleaning Methods 0.000 claims description 18
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 17
- 239000000203 mixture Substances 0.000 claims description 16
- 238000001816 cooling Methods 0.000 claims description 14
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 10
- 229910052802 copper Inorganic materials 0.000 claims description 10
- 239000010949 copper Substances 0.000 claims description 10
- 229910052757 nitrogen Inorganic materials 0.000 claims description 7
- 238000012806 monitoring device Methods 0.000 claims description 4
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 2
- 238000004891 communication Methods 0.000 claims 1
- 230000001105 regulatory effect Effects 0.000 claims 1
- 239000012530 fluid Substances 0.000 abstract description 5
- 238000000197 pyrolysis Methods 0.000 abstract description 4
- 230000035699 permeability Effects 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 6
- 239000011261 inert gas Substances 0.000 description 4
- 229910052786 argon Inorganic materials 0.000 description 3
- 239000008187 granular material Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000003570 air Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/0806—Details, e.g. sample holders, mounting samples for testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
- G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
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- General Health & Medical Sciences (AREA)
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- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
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Abstract
The invention discloses a thermal simulation hydrocarbon generation and discharge experiment system and method for a hydrocarbon source rock, which can realize that a hydrocarbon source rock sample is heated and cracked under a high-pressure condition (confining pressure and axial pressure) by using high-temperature and high-pressure gas as a heating medium and by using a tracking heating tile. The experimental system can measure and record the temperature of each position of a sample in real time, record the data of temperature, pressure, flow, total amount and the like of fluid at the inlet and the outlet of the holder, and timely collect and respectively measure the produced oil gas. In addition, the experiment system can measure the permeability of the rock core, a plurality of heating tiles are arranged in the rock core holder, and each heating tile is provided with a plurality of temperature sensors for monitoring the surface temperature of the rock core. The invention can recycle the pyrolysis gas.
Description
Technical Field
The invention relates to the field of unconventional oil and gas exploration and development, in particular to a hydrocarbon source rock thermal simulation hydrocarbon generation and discharge experiment system and method.
Background
The hydrocarbon generation thermal simulation experiment is an important means for evaluating hydrocarbon forming potential and resources of the hydrocarbon source rock, can reproduce the organic matter pyrolysis evolution process in the geologic body, and provides theoretical basis and experimental data for evaluating basin hydrocarbon forming potential, process and mechanism and deriving hydrocarbon forming mode and dynamics.
The quantity and the composition of the generated hydrocarbons of the geological sample under certain temperature and pressure conditions are researched through a thermal simulation experiment. The hydrocarbon generation thermal simulation experiment uses a simulation instrument as a hydrocarbon stove, and the conventional hydrocarbon stove has the following problems: firstly, a conventional hydrocarbon-generating stove is a pure electric heating type hydrocarbon-generating stove, the heat of the hydrocarbon-generating stove is transferred to a hydrocarbon source rock from outside to inside, in order to ensure the uniformity of the pyrolysis temperature of the hydrocarbon source rock, the hydrocarbon-generating stove cannot be made to be too large, the diameter of the conventional hydrocarbon-generating stove is about 30mm and is smaller than the size of a conventional full-diameter core, so that the core needs to be crushed to 40-60 meshes, and the contact relationship between a core framework and kerogen and the pore structure of the core are damaged in the crushing process; secondly, the interior of the conventional hydrocarbon-generating stove is in a normal-pressure environment which is seriously inconsistent with the pressure environment of the real hydrocarbon source rock in situ, so that the simulation experiment result is not accurate enough.
Disclosure of Invention
The invention aims to provide a system and a method for a hydrocarbon source rock thermal simulation hydrocarbon generation and discharge experiment, which aim to overcome the problems in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a hydrocarbon source rock thermal simulation hydrocarbon generation and discharge experiment system, includes the holder that is used for the centre gripping rock sample, be provided with a plurality of tracking heating tiles on the holder, the entry end of holder is connected with the pre-heater, the entry end of pre-heater is connected to first relief pressure valve through flow monitoring device, the entry end of first relief pressure valve is connected with gaseous air feeder of hydrocarbon and air and nitrogen gas union air feeder, still be connected with cooling device on the pre-heater, still be connected with the pressure boost pressure relief device who is used for increasing clamping pressure and pressure release on the holder, the exit end of holder has set gradually condenser, backpressure valve and gas-liquid knockout drum, the exit end of holder still is connected with belt cleaning device, be connected with evacuating device between condenser and the backpressure valve, be connected with the buffer tank on the backpressure valve, the buffer tank sub, the bottom outlet of the gas-liquid separation tank is connected to the collecting tank, the top outlet of the gas-liquid separation tank is connected to the collecting tank, and the top outlet of the collecting tank is connected to the hydrocarbon gas supply device through a pipeline.
Further, the hydrocarbon gas supply device comprises a first gas cylinder filled with hydrocarbon gas, the outlet end of the first gas cylinder is sequentially connected with a first valve, a first one-way valve, a first pressure gauge, a first booster pump, a second one-way valve, a second valve, a first high-pressure gas storage tank, a second pressure gauge and a fourth valve, the outlet end of the fourth valve is connected with the inlet end of a first pressure reducing valve, a first air compressor is connected between the first pressure gauge and the first booster pump, and a third valve is connected between the first high-pressure gas storage tank and the second pressure gauge;
an outlet at the top of the collecting tank is connected between the first valve and the first one-way valve through a pipeline, and a thirty-first valve and a sixth one-way valve are sequentially arranged on the pipeline.
Further, the air and nitrogen combined air supply device comprises a second air bottle filled with air and a third air bottle filled with nitrogen, an outlet of the second air bottle is connected to a second one-way valve through a fifth valve, an outlet of the third air bottle is connected to a second one-way valve through a ninth valve, an outlet end of the second one-way valve is sequentially connected with a second one-way valve, a third pressure gauge, a second booster pump and a fourth one-way valve, a second air compressor is connected between the third pressure gauge and the second booster pump, an outlet end of the fourth one-way valve is connected with two branch circuits, one branch circuit comprises a sixth valve, a second high-pressure air storage tank, a fourth pressure gauge and an eighth valve which are sequentially connected, a seventh valve is connected between the second high-pressure air storage tank and the fourth pressure gauge, and the other branch circuit comprises a tenth valve, a third high-pressure storage tank, a fifth pressure gauge and a tenth valve which are sequentially connected, an eleventh valve is connected between the third high-pressure storage tank and the fifth pressure gauge, and outlet ends of the eighth valve and the tenth valve are connected with an inlet end of the first pressure reducing valve.
Further, the flow monitoring device comprises three detection branches connected between the outlet end of the first pressure reducing valve and the inlet end of the preheater, the first monitoring branch comprises a tenth valve, a first flowmeter and a fourteenth valve which are sequentially connected, the second monitoring branch comprises a fifteenth valve, a second flowmeter and a sixteenth valve which are sequentially connected, the third monitoring branch comprises a seventeenth valve, a third flowmeter and an eighteenth valve which are sequentially connected, and the measuring ranges of the first flowmeter, the second flowmeter and the third flowmeter are different.
Further, the cooling device comprises a CO charge2A fourth gas cylinder for gas, the outlet end of the fourth gas cylinder is connected with a device for introducing CO2The outlet end of the first storage tank is connected to a cooling port of the preheater sequentially through a first thermometer, a sixth pressure gauge, a nineteenth valve, a constant-speed constant-pressure pump and a twentieth valve;
and the outlet of the preheater is connected to the inlet end of the holder through a fifth one-way valve, a second thermometer and a seventh pressure gauge in sequence.
Further, pressure boost pressure relief device includes high-pressure air compressor, high-pressure air compressor's exit end loops through twenty-four valve, ninth pressure gauge, second storage tank, second relief pressure valve, twenty three valve and eighth pressure gauge and is connected to the side of holder, there is the twenty two valve through the pipe connection between holder and the eighth pressure gauge.
Furthermore, a tenth pressure gauge and a third thermometer are sequentially arranged between the outlet end of the holder and the inlet end of the condenser, the cleaning device is connected between the outlet end of the holder and the tenth pressure gauge, and the cleaning device comprises a twenty-first valve and a cleaning pump which are sequentially connected;
the vacuumizing device comprises a twenty-fifth valve and a vacuum pump which are sequentially connected between the condenser and the back pressure valve.
Furthermore, an eleventh pressure gauge is arranged between the back pressure valve and the buffer tank, a twenty-seventh valve is arranged between the lower part of the buffer tank and the back pressure pump, and a twenty-sixth valve is connected between the eleventh pressure gauge and the buffer tank;
a twelfth pressure gauge is arranged between the back pressure valve and the gas-liquid separation tank, a twenty-eight valve is arranged between the bottom outlet of the gas-liquid separation tank and the collecting tank, and a camera is arranged on the side surface of the gas-liquid separation tank;
a fourth thermometer, a gasometer and a thirtieth valve are sequentially connected between the outlet at the top of the gas-liquid separation tank and the collecting tank, a twenty-ninth valve is arranged between the gasometer and the thirtieth valve, and a thirteenth pressure gauge is arranged on the collecting tank.
Furthermore, the holder adopts the copper sheathing to seal the rock core, and copper sheathing internally mounted has a rock core clamping system, the rock core clamping system exerts the ring through pressure boost pressure relief device to the rock core and releases pressure, the setting of tracking heating tile is inboard at the copper sheathing for heat the rock core and utilize the heating tile to take temperature sensor to measure the surface temperature of rock core certainly.
A thermal simulation hydrocarbon generation and discharge experiment method for a hydrocarbon source rock comprises the following steps:
the method comprises the following steps: checking the air tightness of the system;
step two: filling the rock sample into a holder, and vacuumizing to exhaust air in the experiment system and the pipeline;
step three: ring pressure is added to the holder through a pressure increasing and relieving device;
step four: setting back pressure through a back pressure pump and a back pressure valve;
step five: pressurized gas is introduced into the holder through a hydrocarbon gas supply device or a combined air and nitrogen supply device singly or in a mixed way, and the hydrocarbon generation and discharge processes are simulated;
step six: after a gas and liquid hydrocarbon mixture generated in the experiment process is separated by a gas-liquid separation tank, collecting and metering the liquid hydrocarbon mixture by a collecting tank, collecting gas hydrocarbon by the collecting tank, and metering by a gas meter;
step seven: hydrocarbon gas collected by the collecting tank is reinjected into the system;
step eight: after the experiment is finished, reducing the pressure in the system to the standard atmospheric pressure;
step nine: cooling the preheater through a cooling device;
step ten: changing the experiment temperature, pressure and rock sample conditions, and carrying out experiments under other experiment conditions in the same way;
step eleven: after the experiment is completed, the cleaning device is opened, and the whole system and the pipeline are cleaned.
Compared with the prior art, the invention has the following beneficial technical effects:
the invention relates to a hydrocarbon source rock hydrocarbon generation thermal simulation under a closed system, which is based on experimental equipment for directly applying pressure to a hydrocarbon source rock core and researching hydrocarbon generation capacity and hydrocarbon discharge capacity of different types of hydrocarbon source rocks under different temperature and pressure conditions, can measure and record the temperature of each position of a sample in real time, record the temperature, pressure, flow, total amount and other data of inlet and outlet fluid in real time, collect and respectively measure produced oil gas, and simultaneously can calculate the permeability of the core according to Darcy's law.
Further, the preheater is used for preheating injected gas, the gas temperature control range is from room temperature to 700 ℃, and the temperature control precision reaches 1 ℃.
Furthermore, a cleaning solvent is introduced into the test system by the cleaning pump, so that residual organic matters in the test system are dissolved, and the aim of cleaning is fulfilled.
Furthermore, the gas in the second storage tank is inert gas, and the inert gas has good gas heat preservation performance, does not react with other parts of the clamp holder, and does not corrode equipment parts.
Furthermore, the vacuum pump is used for vacuumizing the system, so that the influence on the accuracy of an experimental result due to the interference of air is avoided.
Drawings
FIG. 1 is a structural diagram of a thermal simulation hydrocarbon generation and discharge experiment system of a hydrocarbon source rock.
Wherein, 1 a first gas cylinder, 2 a first valve, 3 a first check valve, 4 a first air compressor, 5 a first pressure gauge, 6 a first booster pump, 7 a second check valve, 8 a second valve, 9 a first high pressure gas tank, 10 a third valve, 11 a second pressure gauge, 12 a fourth valve, 13 a second gas cylinder, 14 a fifth valve, 15 a second check valve, 16 a third pressure gauge, 17 a second booster pump, 18 a fourth check valve, 19 a sixth valve, 20 a second high pressure gas tank, 21 a seventh valve, 22 a fourth pressure gauge, 23 an eighth valve, 24 a third gas cylinder, 25 a ninth valve, 26 a second air compressor, 27 a tenth valve, 28 an eleventh valve, 29 a fifth pressure gauge, 30 a twelfth valve, 31 a third high pressure gas tank, 32 a first pressure reducing valve, 33 a tenth valve, 34 a first flow meter, 35 a fourteenth valve, 36 a fifteenth valve, 37 a second flow meter, 38 a sixteenth valve, 39 a seventeenth valve, 40 a third flow meter, an eighteenth valve 41, a fourth gas bottle 42, a first storage tank 43, a first thermometer 44, a sixth pressure gauge 45, a nineteenth valve 46, a constant-speed constant-pressure pump 47, a twentieth valve 48, a preheater 49, a fifth check valve 50, a second temperature gauge 51, a seventh pressure gauge 52, a clamp 53, a purge pump 54, a twenty-first valve 55, a twenty-second valve 56, an eighth pressure gauge 57, a twentieth valve 58, a second pressure reducing valve 59, a second storage tank 60, a ninth pressure gauge 61, a twenty-fourth valve 62, a high-pressure air compressor 63, a tenth pressure gauge 64, a third temperature gauge 65, a condenser 66, a twenty-fifth valve 67, a vacuum pump 68, a back-pressure valve 69, an eleventh pressure gauge 70, a twenty-sixth valve 71, a buffer tank 72, a twenty-seventh valve 73, a back-pressure pump 74, a twelfth pressure gauge 75, a fourth temperature gauge 76, a gas-liquid separation tank 77, a video camera 78, a twenty-eighth valve 79, a collection tank 80, a gas meter 81, 82 twenty ninth valve, 83 thirtieth valve, 84 holding tank, 85 thirteenth pressure gauge, 86 thirty-first valve, 87 sixth one-way valve.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
As shown in fig. 1, in the experimental system, a first gas cylinder 1, a first valve 2, a first check valve 3, a first pressure gauge 5, a first booster pump 6, a second check valve 7, a second valve 8, a first high-pressure gas storage tank 9, a second pressure gauge 11, a fourth valve 12 and an inlet of a first pressure reducing valve 32 are connected in sequence through pipelines; the first air compressor 4 is connected between a first pressure gauge 5 and a first booster pump 6 through a pipeline; a third valve 10 is connected between the first high pressure reservoir 9 and a second pressure gauge 11.
In the experimental system, as shown in the figure, a second gas cylinder 13, a fifth valve 14, a ninth valve 25 and a third gas cylinder 24 are connected in sequence through pipelines; the second air compressor 26 is connected between the third pressure gauge 16 and the second booster pump 17; a second one-way valve 15, a third pressure gauge 16, a second booster pump 17 and a fourth one-way valve 18 are connected between the fifth valve 14 and the ninth valve 25 in sequence and then divided into two branches:
a first branch: the sixth valve 19, the second high pressure gas storage tank 20, the fourth pressure gauge 22, and the eighth valve 23 are connected to an inlet of the first pressure reducing valve 32 through a pipeline. The seventh valve 21 is connected between the second high pressure air storage tank 20 and the fourth pressure gauge 22 through pipelines.
A second branch circuit: the tenth valve 27, the third high-pressure storage tank 31, the fifth pressure gauge 29, the twelfth valve 30 and the first pressure reducing valve 32 are connected in sequence through pipelines. The eleventh valve 28 is connected between the third high-pressure gas storage tank 31 and the fifth pressure gauge 29 through a pipeline.
The outlet of the pressure reducing valve 32 is divided into three branches:
the inlet of the tenth valve 33, the first flowmeter 34, the fourteenth valve 35 and the preheater 49 are connected in the first branch through pipelines;
the second branch is internally connected with the inlets of a fifteenth valve 36, a second flowmeter 37, a sixteenth valve 38 and a preheater 49 through pipelines;
the seventeenth valve 39, the third flow meter 40, the eighteenth valve 41 and the preheater 49 are connected in the third branch through pipelines;
the three paths are merged and then connected with the inlet of the preheater 49.
In the experimental system, a fourth gas cylinder 42, a first storage tank 43, a first thermometer 44, a sixth pressure gauge 45, a nineteenth valve 46, a constant-speed constant-pressure pump 47, a twentieth valve 48 and a cooling port of a preheater 49 are connected in sequence through pipelines.
In the experimental system, an outlet of a preheater 49, a fifth check valve 50, a second thermometer 51, a seventh pressure gauge 52 and a holder 53 are connected in sequence through pipelines.
In the experimental system, a ring pressure opening of the clamp holder 53 is sequentially connected with an eighth pressure gauge 57, a twentieth valve 58, a second pressure reducing valve 59, a second storage tank 60, a ninth pressure gauge 61, a twenty-fourth valve 62 and a high-pressure air compressor 63 through pipelines. A twentieth valve 56 is connected by a line between the holder 53 and an eighth pressure gauge 57.
In the experimental system, the holder 53, the tenth pressure gauge 64, the third temperature gauge 65, the condenser 66, the back pressure valve 69, the twelfth pressure gauge 75 and the inlet of the gas-liquid separation tank 77 are connected in sequence through pipelines.
An outlet of the gas-liquid separation tank 77 is sequentially connected with a fourth thermometer 76, a gas meter 81, a thirtieth valve 83 and a collecting tank 84 through pipelines, and a twenty-ninth valve 82 is arranged between the gas meter 81 and the thirtieth valve 83.
As shown, the twenty-first valve 55 and the purge pump 54 are connected by a line between the clamper 53 and the tenth pressure gauge 64.
As shown, a twenty-fifth valve 67 and a vacuum pump 68 are connected by a line between the condenser 66 and a back pressure valve 69.
As shown in the figure, the bottom of the back pressure valve 69 is connected with an eleventh pressure gauge 70, a buffer tank 72, a twenty-seventh valve 73 and a back pressure pump 74 in sequence. A twenty-sixth valve 71 is connected between the eleventh pressure gauge 70 and the buffer tank 72.
As shown, the bottom of the gas-liquid separation tank 77 is connected to a twenty-eighth valve 79 and a collection tank 80. The camera 78 is placed beside the gas-liquid separation tank 77.
As shown, a collection tank 84, a thirty-first valve 86, a sixth one-way valve 87 are connected between the first valve 2 and the first one-way valve 3. A thirteenth pressure gauge 85 is arranged on the collecting tank 84.
Sufficient hydrocarbon gas is filled in the first gas bottle 1, the hydrocarbon gas is pressurized by the first booster pump 6, and high-pressure gas is stored through the first high-pressure gas storage tank 9. The first pressure gauge 5 monitors the pressure of the air outlet of the air bottle, the second pressure gauge 11 monitors the pressure after pressurization, and the third valve 10 is used as an emptying valve after the test is finished.
The second gas cylinder 13 is filled with sufficient air, and the third gas cylinder 24 is filled with sufficient nitrogen. A third pressure gauge 16 monitors the outlet pressure of the two gas cylinders, and a second booster pump 17 boosts the gas. The fourth pressure gauge 22 monitors the pressure after air pressurization and the fifth pressure gauge 29 monitors the pressure after nitrogen pressurization. After the experiment, the seventh valve 21 and the eleventh valve 28 are used as the air release valves.
This experimental system also can carry out three kinds of gas mixture experiments simultaneously, with first gas cylinder 1, second gas cylinder 13, third gas cylinder 24, after the pressure boost was all opened to three gas cylinders, lets in gas mixture in preheater 49.
In the three flow monitor branches, the first flow meter 34 is a small-range flow meter, the second flow meter 37 is a medium-range flow meter, and the third flow meter 40 is a large-range flow meter, and is flexibly selected for use according to experimental needs.
Sufficient CO is filled in the fourth gas bottle 422Gas, the first reservoir 43 may be CO2The cooling bath is liquefied, and the preheater 49 is cooled. Constant speed constant pressure pump 47 for CO2Constant velocity or constant pressure injection.
The preheater 49 is used for preheating the injected gas, and the recommended gas temperature control range is from room temperature to 700 ℃, and the temperature control precision reaches 1 ℃.
The holder 53 is a core holder, a copper sleeve is adopted to seal the core, a core holding system is arranged inside the copper sleeve to apply annular pressure to the core, a jacket is arranged outside the copper sleeve to cool, and the pressure bearing is more than 20 MPa. A tracking heating tile is arranged on the inner side of the copper sleeve, and a plurality of temperature sensors are arranged inside the tracking heating tile. The tracking heating tile can directly heat the rock core and monitor the surface temperature of the rock core through the temperature sensor, and the tracking heating tile amount in the holder is set according to experiments. After the end face of the rock core is drilled, thermocouples are placed at different depth positions and then are filled, the temperature inside the rock core is monitored, and the number of the thermocouples is not less than 5. The rock sample can be granule, powder or column core, and the core size can be designed flexibly.
The twenty-first valve 55 and the cleaning pump 54 are opened, so that the cleaning solvent can be introduced into the test system to dissolve the residual organic matters in the test system, thereby achieving the purpose of cleaning.
The high-pressure air compressor 63 pressurizes the gas in the second storage tank 60, the pressure is reduced to the pressure meeting the experimental requirements through the second pressure reducing valve 59, and the gas is introduced into the clamp holder 53 to provide the ring pressure for the clamp holder 53. The second reservoir 60 is filled with a sufficient amount of inert gas, typically argon, and the argon in the second reservoir 60 is pressurized and passed into the holder 53 to provide a ring pressure to the holder. The ring pressure is pressurized to the experimental target pressure as required by the experimental protocol. The argon is inert gas which is used as a ring pressure transfer medium in ring pressure, has good gas heat preservation performance, does not react with other parts of the clamp holder, and does not corrode equipment parts.
The eighth pressure gauge 57 is a ring pressure gauge, and the twentieth valve 56 is an air release valve.
The tenth pressure gauge 64 and the third temperature gauge 65 monitor the temperature and the pressure of the medium at the outlet of the clamp 53.
The vacuum pump 68 is used for vacuumizing the system, so that the system is prevented from being interfered by air and the accuracy of the experiment is prevented from being influenced.
The buffer tank 72 is a piston type buffer tank, and the back pressure is set through a back pressure pump 74, so that the pressure fluid meeting the experimental requirements passes through the back pressure valve 69. The buffer tank 72 plays the roles of preventing the liquid from sucking back to damage the equipment and buffering to stabilize the pressure during vacuumizing.
The gas-liquid separation tank 77 has a water bath function, high-temperature fluid passes through the holder 53, then the temperature of the oil gas is reduced through the gas-liquid separation tank, the oil gas is separated, and a hydrocarbon liquid mixture is sampled through the eighteenth-second valve 79, collected in the collection pool 80 and metered. The hydrocarbon gas mixture enters a collecting tank 84 through a gas meter 81 and a thirtieth valve 83 for collection and storage. The camera 78 photographs the experimental phenomenon in the oil separator. The collection tank 80 may collect and meter the hydrocarbon liquid mixture.
The twenty-ninth valve 82 is used to control the sample port switch. The gas is collected in a collection tank 84. The thirteenth pressure gauge 85 is used to monitor the pressure in the collection tank, and the collected hydrocarbon gas mixture is injected back into the system through the thirty-first valve 86 and the sixth one-way valve 87.
The specific embodiments of the invention are described as follows:
(1) checking air tightness: after the system is connected, the equipment is cleaned, the components of the system are checked, all valves are closed, and the airtightness of the device is checked, as shown in fig. 1.
(2) Sample loading and vacuumizing: and (3) filling the rock sample into the core holder, opening the first pressure reducing valve 32, the tenth valve 33, the fourteenth valve 35, the fifteenth valve 36, the sixteenth valve 38, the seventeenth valve 39, the eighteenth valve 41, the twenty fifth valve 67, the vacuum pump 68, the back pressure valve 69, the thirtieth valve 83 and the thirty-first valve 86, and exhausting air in the experiment system and the pipeline, so that the interference of the air on the experiment is exhausted, and the preparation is made for the experiment. And closing the valve after vacuumizing. The rock sample can be granule, powder or column core, and the core size can be designed flexibly.
(3) Ring pressure is added: and opening a high-pressure air compressor 63, a twenty-fourth valve 62, a second storage tank 60, a second pressure reducing valve 59 and a twentieth valve 58 to pressurize the ring pressure for the clamp.
(4) Adding back pressure: the back pressure pump 74, the twenty-seventh valve 73, the surge tank 72, and the back pressure valve 69 are opened to set the back pressure.
(5) Gas injection: opening a first gas cylinder 1, a first valve 2, a first one-way valve 3, a first air compressor 4, a first booster pump 6, a second one-way valve 7, a second valve 8, a first high-pressure gas storage tank 9, a fourth valve 12, a first pressure reducing valve 32 and opening a flow meter branch according to experimental conditions. The pressurized gas is passed to preheater 49. The gas enters the holder 53 to simulate the hydrocarbon generation and discharge processes.
(6) Separating and collecting gas: the oil-gas mixture that the experiment in-process produced gets into gas-liquid separation jar 77 through back pressure valve 69, and the oil-gas mixture of cooling, oil are through the twenty-eighth valve 79 sample in bottom, collect in collecting pit 80. The gas is metered by a gas meter 81 for volume and may be sampled at a twenty-ninth valve 82 and collected in a collection tank 84. The collection tank 80 may collect and meter a liquid hydrocarbon mixture.
(7) Hydrocarbon gas mixture reinjection: the collected hydrocarbon gas is injected back into the system through the thirty-first valve 86 and the sixth one-way valve 87.
(8) Evacuation pressure: after the test is completed, the third valve 10, the seventh valve 21, the eleventh valve 28, the twentieth valve 56, and the twenty-sixth valve 71 are opened to reduce the pressure in the apparatus to the standard atmospheric pressure.
(9) Cooling of the preheater 49: opening a fourth gas bottle 42, a first storage tank 43, a nineteenth valve 46, a constant-speed constant-pressure pump 47 and a twentieth valve 48 to pass cooled CO2The gas cools the preheater 49.
(10) The test was continued with changing the gas species: the device is provided with three different types of gas, and all the operations are repeated when the gas is replaced. When mixed gas needs to be injected, a first gas cylinder 1, a first valve 2, a first one-way valve 3, a first air compressor 4, a first booster pump 6, a second one-way valve 7, a second valve 8, a first high-pressure gas storage tank 9, a fourth valve 12, a second gas cylinder 13, a fifth valve 14, a third gas cylinder 24, a ninth valve 25, a second one-way valve 15, a second air compressor 26, a second booster pump 17, a fourth one-way valve 18, a sixth valve 19, a second high-pressure gas storage tank 20, an eighth valve 23, a tenth valve 27, a third high-pressure gas storage tank 31, a twelfth valve 30 and a pressure reducing valve 32 need to be opened simultaneously, a flow meter branch is opened according to experimental conditions, and gas is supplied to the clamp holder.
(11) The experiment was continued with changing conditions: and changing the experiment temperature, pressure and rock sample conditions, and carrying out experiments under other experiment conditions in the same way.
(12) Cleaning equipment: after the experiment is completed, the cleaning pump 54, twenty-first valve 55 are opened and the entire apparatus and pipeline are cleaned.
The invention can realize the heating and cracking of the hydrocarbon source rock sample under the high pressure condition (confining pressure plus axial pressure) by adopting high-temperature high-pressure gas as a heating medium. The experimental system can measure and record the temperature of each position of a sample in real time, record the data of temperature, pressure, flow, total amount and the like of fluid at the inlet and the outlet of the holder, and timely collect and respectively measure the produced oil gas. The experiment system can measure the permeability of the rock core, a plurality of heating tiles are additionally arranged in the rock core holder, a plurality of temperature sensors are arranged in each heating tile, and the sensors are used for detecting the surface temperature of the rock core. Meanwhile, the pyrolysis gas collected by the collection tank 84 can be reinjected through the thirty-one valve 86 and the sixth one-way valve 87 in sequence.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides a hydrocarbon source rock thermal simulation generation and exhaust experiment system, a serial communication port, including holder (53) that is used for the centre gripping rock specimen, be provided with a plurality of tracking heating tiles on holder (53), the entry end of holder (53) is connected with pre-heater (49), the entry end of pre-heater (49) is connected to first relief pressure valve (32) through flow monitoring device, the entry end of first relief pressure valve (32) is connected with hydrocarbon gas air feeder and air and nitrogen gas joint air feeder, still be connected with cooling device on pre-heater (49), still be connected with the pressure boost pressure relief device who is used for increasing clamping pressure and pressure release on holder (53), the exit end of holder (53) has set gradually condenser (66), backpressure valve (69) and gas-liquid separation tank (77), the exit end of holder (53) still is connected with belt cleaning device, be connected with evacuating device between condenser (66) and backpressure valve (69), be connected with buffer tank (72) on backpressure valve (69), buffer tank (72) sub-unit connection has back pressure pump (74), the bottom exit linkage of gas-liquid separation jar (77) to collecting pit (80), top exit linkage to collecting vessel (84), and collecting vessel (84) top export is through pipe connection to hydrocarbon gas air feeder.
2. The experimental system for the thermal simulation hydrocarbon generation and discharge of the hydrocarbon source rock as claimed in claim 1, wherein the hydrocarbon gas supply device comprises a first gas cylinder (1) filled with hydrocarbon gas, the outlet end of the first gas cylinder (1) is sequentially connected with a first valve (2), a first one-way valve (3), a first pressure gauge (5), a first booster pump (6), a second one-way valve (7), a second valve (8), a first high-pressure gas storage tank (9), a second pressure gauge (11) and a fourth valve (12), the outlet end of the fourth valve (12) is connected with the inlet end of a first pressure reducing valve (32), a first air compressor (4) is connected between the first pressure gauge (5) and the first booster pump (6), and a third valve (10) is connected between the first high-pressure gas storage tank (9) and the second pressure gauge (11);
an outlet at the top of the collecting tank (84) is connected between the first valve (2) and the first one-way valve (3) through a pipeline, and a thirty-first valve (86) and a sixth one-way valve (87) are sequentially arranged on the pipeline.
3. The experimental system for hydrocarbon source rock thermal simulation hydrocarbon generation and discharge as claimed in claim 1, wherein the air and nitrogen combined air supply device comprises a second air cylinder (13) filled with air and a third air cylinder (24) filled with nitrogen, an outlet of the second air cylinder (13) is connected to a second one-way valve (15) through a fifth valve (14), an outlet of the third air cylinder (24) is connected to a second one-way valve (15) through a ninth valve (25), an outlet end of the second one-way valve (15) is sequentially connected with a second one-way valve (15), a third pressure gauge (16), a second booster pump (17) and a fourth one-way valve (18), a second air compressor (26) is connected between the third pressure gauge (16) and the second booster pump (17), an outlet end of the fourth one-way valve (18) is connected with two branch circuits, one of the branch circuits comprises a sixth valve (19), a third one of the fourth one of the third one-way valves (18) which are sequentially connected, The pressure regulating valve comprises a second high-pressure gas storage tank (20), a fourth pressure gauge (22) and an eighth valve (23), a seventh valve (21) is connected between the second high-pressure gas storage tank (20) and the fourth pressure gauge (22), the other branch comprises a tenth valve (27), a third high-pressure storage tank (31), a fifth pressure gauge (29) and a tenth valve (30) which are sequentially connected, an eleventh valve (28) is connected between the third high-pressure storage tank (31) and the fifth pressure gauge (29), and outlet ends of the eighth valve (23) and the tenth valve (30) are connected with an inlet end of a first pressure reducing valve (32).
4. A hydrocarbon source rock thermal simulation generation and discharge experiment system as claimed in claim 1, wherein the flow monitoring device comprises three detection branches connected between an outlet end of the first pressure reducing valve (32) and an inlet end of the preheater (49), a first monitoring branch comprises a tenth valve (33), a first flow meter (34) and a fourteenth valve (35) which are connected in sequence, a second monitoring branch comprises a fifteenth valve (36), a second flow meter (37) and a sixteenth valve (38) which are connected in sequence, a third monitoring branch comprises a seventeenth valve (39), a third flow meter (40) and an eighteenth valve (41) which are connected in sequence, and the ranges of the first flow meter (34), the second flow meter (37) and the third flow meter (40) are different.
5. The system of claim 1, wherein the cooling device comprises a CO-filled system for performing thermal simulation hydrocarbon generation and discharge experiment on the source rock2A fourth gas cylinder (42) for gas, the outlet end of the fourth gas cylinder (42) is connected with a device for introducing CO2A first storage tank (43) for cold bath liquefaction, wherein the outlet end of the first storage tank (43) is connected to the cooling of a preheater (49) through a first thermometer (44), a sixth pressure gauge (45), a nineteenth valve (46), a constant-speed constant-pressure pump (47) and a twentieth valve (48) in sequenceA mouth;
an outlet of the preheater (49) is connected to an inlet end of a clamp (53) through a fifth one-way valve (50), a second thermometer (51) and a seventh pressure gauge (52) in sequence.
6. The experimental system for the thermal simulation hydrocarbon generation and discharge of the hydrocarbon source rock as claimed in claim 1, wherein the pressure boosting and relieving device comprises a high-pressure air compressor (63), an outlet end of the high-pressure air compressor (63) is connected to the side surface of the gripper (53) sequentially through a twenty-four valve (62), a ninth pressure gauge (61), a second storage tank (60), a second pressure reducing valve (59), a twentieth valve (58) and an eighth pressure gauge (57), and a twentieth valve (56) is connected between the gripper (53) and the eighth pressure gauge (57) through a pipeline.
7. The experimental system for the thermal simulation generation and discharge of hydrocarbon source rocks according to claim 1, characterized in that a tenth pressure gauge (64) and a third temperature gauge (65) are sequentially arranged between the outlet end of the holder (53) and the inlet end of the condenser (66), the cleaning device is connected between the outlet end of the holder (53) and the tenth pressure gauge (64), and the cleaning device comprises a twenty-first valve (55) and a cleaning pump (54) which are sequentially connected;
the vacuumizing device comprises a twenty-fifth valve (67) and a vacuum pump (68) which are sequentially connected between a condenser (66) and a back pressure valve (69).
8. The experimental system for the thermal simulation generation and discharge of hydrocarbon source rocks according to claim 1, characterized in that an eleventh pressure gauge (70) is arranged between the back pressure valve (69) and the buffer tank (72), a twenty-seventh valve (73) is arranged between the lower part of the buffer tank (72) and the back pressure pump (74), and a twenty-sixth valve (71) is connected between the eleventh pressure gauge (70) and the buffer tank (72);
a twelfth pressure gauge (75) is arranged between the back pressure valve (69) and the gas-liquid separation tank (77), a twenty-eight valve (79) is arranged between the bottom outlet of the gas-liquid separation tank (77) and the collecting tank (80), and a camera (78) is arranged on the side surface of the gas-liquid separation tank (77);
a fourth thermometer (76), a gas meter (81) and a thirtieth valve (83) are sequentially connected between an outlet at the top of the gas-liquid separation tank (77) and the collection tank (84), a twenty-ninth valve (82) is arranged between the gas meter (81) and the thirtieth valve (83), and a thirteenth pressure gauge (85) is arranged on the collection tank (84).
9. The hydrocarbon source rock thermal simulation generation and hydrocarbon discharge experiment system as claimed in claim 1, wherein the holder (53) adopts a copper sleeve to seal the core, a core holding system is installed inside the copper sleeve, the core holding system applies ring pressure and pressure release to the core through a pressurizing and pressure releasing device, and the tracking heating tile is arranged on the inner side of the copper sleeve and used for heating the core and measuring the surface temperature of the core by using a temperature sensor arranged on the heating tile.
10. A thermal simulation hydrocarbon generation and discharge experiment method for a hydrocarbon source rock, which adopts the thermal simulation hydrocarbon generation and discharge experiment system for the hydrocarbon source rock as claimed in any one of claims 1 to 9, and is characterized by comprising the following steps:
the method comprises the following steps: checking the air tightness of the system;
step two: filling the rock sample into a holder (53) and vacuumizing to exhaust the air in the experiment system and the pipeline;
step three: the holder (53) is pressurized and annularly pressurized by a pressurizing and pressure-releasing device;
step four: the back pressure is set through a back pressure pump (74) and a back pressure valve (69);
step five: pressurized gas is introduced into the holder (53) through a hydrocarbon gas supply device or a combined air and nitrogen gas supply device singly or in a mixed way, so as to simulate the hydrocarbon generation and discharge processes;
step six: after a gas hydrocarbon mixture and a liquid hydrocarbon mixture generated in the experiment process are separated by a gas-liquid separation tank (77), the liquid hydrocarbon mixture is collected and metered by a collection tank (80), and gas hydrocarbons are collected by a collection tank (84) and metered by a gas meter (81);
step seven: hydrocarbon gas collected by the collection tank (84) is reinjected into the system;
step eight: after the experiment is finished, reducing the pressure in the system to the standard atmospheric pressure;
step nine: cooling the preheater (49) by a cooling device;
step ten: changing the experiment temperature, pressure and rock sample conditions, and carrying out experiments under other experiment conditions in the same way;
step eleven: after the experiment is completed, the cleaning device is opened, and the whole system and the pipeline are cleaned.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113863904A (en) * | 2021-10-27 | 2021-12-31 | 中国华能集团清洁能源技术研究院有限公司 | Gas sealing experiment device and method |
| CN114509378A (en) * | 2022-04-13 | 2022-05-17 | 太原理工大学 | Simulation device and experiment method for seepage and pyrolysis in-situ mining of organic rock |
| CN114660266A (en) * | 2022-03-21 | 2022-06-24 | 西安交通大学 | Test system for simulating in-situ pyrolysis oil extraction gas of underground organic rock and working method |
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2021
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113863904A (en) * | 2021-10-27 | 2021-12-31 | 中国华能集团清洁能源技术研究院有限公司 | Gas sealing experiment device and method |
| CN114660266A (en) * | 2022-03-21 | 2022-06-24 | 西安交通大学 | Test system for simulating in-situ pyrolysis oil extraction gas of underground organic rock and working method |
| CN114509378A (en) * | 2022-04-13 | 2022-05-17 | 太原理工大学 | Simulation device and experiment method for seepage and pyrolysis in-situ mining of organic rock |
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