CN112211599A - Device and method for simulating drilling fluid to invade reservoir stratum to induce hydrate decomposition - Google Patents
Device and method for simulating drilling fluid to invade reservoir stratum to induce hydrate decomposition Download PDFInfo
- Publication number
- CN112211599A CN112211599A CN201910628749.3A CN201910628749A CN112211599A CN 112211599 A CN112211599 A CN 112211599A CN 201910628749 A CN201910628749 A CN 201910628749A CN 112211599 A CN112211599 A CN 112211599A
- Authority
- CN
- China
- Prior art keywords
- pressure
- reaction kettle
- temperature
- drilling fluid
- pressure reaction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 153
- 239000012530 fluid Substances 0.000 title claims abstract description 146
- 238000000354 decomposition reaction Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000006243 chemical reaction Methods 0.000 claims abstract description 170
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 57
- 238000005086 pumping Methods 0.000 claims abstract description 20
- 239000007789 gas Substances 0.000 claims description 99
- 230000009545 invasion Effects 0.000 claims description 50
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 22
- 239000007788 liquid Substances 0.000 claims description 21
- 239000006004 Quartz sand Substances 0.000 claims description 17
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 17
- 239000000110 cooling liquid Substances 0.000 claims description 8
- 238000012544 monitoring process Methods 0.000 claims description 8
- 238000002474 experimental method Methods 0.000 claims description 7
- 239000003345 natural gas Substances 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 6
- 239000011435 rock Substances 0.000 claims description 6
- 150000004677 hydrates Chemical class 0.000 claims description 5
- 238000007654 immersion Methods 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 5
- 239000011148 porous material Substances 0.000 claims description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 4
- 230000033001 locomotion Effects 0.000 claims description 4
- 230000000007 visual effect Effects 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 2
- 239000001569 carbon dioxide Substances 0.000 claims description 2
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 claims description 2
- 238000010494 dissociation reaction Methods 0.000 claims 1
- 230000005593 dissociations Effects 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 238000011160 research Methods 0.000 description 8
- NMJORVOYSJLJGU-UHFFFAOYSA-N methane clathrate Chemical compound C.C.C.C.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O NMJORVOYSJLJGU-UHFFFAOYSA-N 0.000 description 6
- 101100493705 Caenorhabditis elegans bath-36 gene Proteins 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- -1 Natural gas hydrates Chemical class 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Classifications
-
- 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
- E21B43/01—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells specially adapted for obtaining from underwater installations
-
- 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
- E21B47/00—Survey of boreholes or wells
-
- 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
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
-
- 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
- E21B47/00—Survey of boreholes or wells
- E21B47/10—Locating fluid leaks, intrusions or movements
Landscapes
- 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)
- Geophysics (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Earth Drilling (AREA)
Abstract
The invention provides a device and a method for simulating drilling fluid to invade a reservoir stratum to induce hydrate decomposition. The device comprises a high-pressure reaction kettle (34), a high-low temperature water bath temperature control system (102), a high-low temperature constant temperature air bath box (21), a drilling fluid pumping system (104), a gas control system (105), a back pressure unloading system (106) and a data acquisition system (107); the reaction kettle is arranged in the high-low temperature constant-temperature air bath box, the reaction temperature of the reaction kettle and the gas temperature in the gas control system are respectively controlled by the high-low temperature water bath temperature control system, the drilling fluid pumping system is connected with the reaction kettle through a pipeline, the back pressure unloading system and the gas control system are respectively communicated with the inside of the reaction kettle through pipelines and air inlet/outlet holes (10) arranged at the upper part of the reaction kettle, and the back pressure unloading system is used for respectively controlling the pressure balance of the reaction kettle, the gas control system and the outside.
Description
Technical Field
The invention relates to the field of natural gas exploration and development, in particular to a device and a method for simulating drilling fluid to invade a reservoir stratum to induce hydrate decomposition.
Background
The natural gas hydrate is an ice-like crystalline compound formed by water molecules and hydrocarbon gas molecules under the conditions of low temperature and high pressure, is also called as combustible ice or solid gas, has the characteristics of high energy density, wide distribution, large reserve capacity and the like, and is a new energy and alternative energy with great potential.
Natural gas hydrates are widely distributed in frozen earth and in marine areas, and the stored natural gas far exceeds the known natural gas reserves. The natural gas hydrate is explored and developed without drilling, and in order to ensure that the hydrate in a reservoir layer is not decomposed in a large amount in the drilling construction process, an overbalance drilling mode is adopted. The drilling fluid is inevitably promoted to invade the reservoir, and the invasion of the drilling fluid is likely to induce the decomposition of hydrate in the reservoir, so that the negative conditions of gas invasion, hydrate secondary formation, hole expansion, well wall collapse and the like occur.
In order to weaken hydrate decomposition caused by drilling fluid invasion, a low-temperature drilling fluid system is usually adopted in the hydrate drilling construction process, but researches have not been carried out to quantitatively analyze and obtain what drilling fluid invasion temperature, drilling fluid invasion amount and drilling fluid invasion rate are relatively safe, namely obvious negative conditions are not caused; there is no detailed reference to which ranges of drilling fluid invasion temperature, invasion volume and invasion rate are outside which can induce adverse conditions and even safety risks. Therefore, in view of the hot point of research on trial exploitation of natural gas hydrate in China and even all over the world, it is urgently needed to develop a set of experimental device for simulating drilling fluid to invade into a reservoir stratum to induce hydrate decomposition, and develop a corresponding experimental method to provide a reference with important value for safe drilling of natural gas hydrate.
Disclosure of Invention
At present, few experimental devices are used for internationally simulating the invasion of the drilling fluid into a hydrate reservoir, the influence of the invasion of the drilling fluid into the reservoir on the decomposition of the hydrate cannot be quantitatively evaluated, and further reference with important value is difficult to provide for the drilling construction of a stratum containing the hydrate. Under the circumstance, the technical problem to be solved by the invention is to provide an experimental device and method for simulating the invasion of drilling fluid into a reservoir to induce the hydrate decomposition aiming at the defects in the prior art, and the experimental device and method can be used for researching whether the drilling fluid with different invasion temperatures, invasion amounts and invasion rates can cause the hydrate decomposition in the reservoir and the decomposition degree of the hydrate, can also be used for evaluating the hydrate inhibitor capacity of inhibiting the hydrate decomposition and the like, and can provide powerful technical support for the exploration and development of natural gas hydrate.
The invention aims to provide a device for simulating the invasion of drilling fluid into a reservoir to induce the decomposition of hydrate.
Another object of the present invention is to provide a method for simulating the invasion of drilling fluid into a reservoir to induce hydrate decomposition.
In order to achieve the above objects, in one aspect, the present invention provides a device for simulating the invasion of drilling fluid into a reservoir to induce hydrate decomposition, wherein the device comprises a high-pressure reaction kettle 34, a high-low temperature water bath temperature control system 102, a high-low temperature constant temperature air bath box 21, a drilling fluid pumping system 104, a gas control system 105, a back pressure unloading system 106 and a data acquisition system 107; the reaction kettle is arranged in the high-low temperature constant-temperature air bath box, the reaction temperature of the reaction kettle is controlled by the high-low temperature water bath temperature control system, the drilling fluid pumping system is connected with the reaction kettle through a pipeline, the back pressure unloading system and the gas control system are respectively communicated with the interior of the reaction kettle through a pipeline and an air inlet/outlet hole 10 formed in the upper portion of the reaction kettle, the back pressure unloading system is used for respectively controlling the pressure balance of the reaction kettle, the gas control system and the outside, and the data acquisition system is electrically connected with the reaction kettle and used for collecting the reaction data of the reaction kettle.
According to some embodiments of the present invention, wherein the inlet holes of the inlet/outlet holes 10 are connected to the gas control system 105 through pipes; the exhaust holes of the air inlet/exhaust hole 10 are connected with a back pressure unloading system through pipelines.
According to some embodiments of the present invention, the gas control system 105 comprises a gas source storage tank 1, a buffer tank 25 and a vacuum pump 4 connected in series by high pressure pipelines, wherein the buffer tank and the vacuum pump are respectively connected with the gas inlet/outlet hole 10 via pipelines.
According to some embodiments of the present invention, the gas control system 105 further comprises a first pressure gauge 2 disposed at an outlet of the gas source tank 1, a first needle valve 3 disposed on a pipe between the first pressure gauge and the buffer tank 25, a second pressure gauge 5 disposed on the buffer tank, a second needle valve 26 and a third needle valve 28 sequentially disposed on a pipe between the buffer tank and the high pressure reactor 34, and a fourth needle valve 8, wherein the vacuum pump 4 is connected to the gas inlet/outlet hole 10 via the fourth needle valve and the third needle valve sequentially via a pipe.
According to some embodiments of the present invention, the high-low temperature water bath temperature control system 102 includes a constant temperature liquid circulating pump 23, a water bath jacket 24 disposed on the outer layer of the buffer tank, a water bath 36, and a cooling liquid circulating pump 35 disposed in the water bath, the constant temperature liquid circulating pump is connected to the water bath jacket and the water bath via a heat preservation pipeline, and the high-pressure reactor 34 is disposed in the water bath.
According to some embodiments of the invention, the water bath 36 is a fully transparent water bath.
According to some embodiments of the invention, the thermal insulation pipeline is a thermal insulation hose.
According to some embodiments of the present invention, the drilling fluid pumping system 104 comprises a constant flow pump 12 and a drilling fluid storage tank 6 connected in series by a pipeline, wherein a piston 27 is disposed in the drilling fluid storage tank, and the reciprocating motion of the piston is controlled by the constant flow pump, and the drilling fluid storage tank is communicated with the inside of the high pressure reaction vessel 34 through the pipeline and through a drilling fluid immersion hole 38 disposed at the top of the reaction vessel 34.
According to some embodiments of the present invention, the number of the dipping holes 38 is five.
According to some embodiments of the present invention, the drilling fluid pumping system 104 further comprises a third pressure gauge 7 disposed on the drilling fluid storage tank 6, and a liquid flow meter 13 disposed on the pipeline between the drilling fluid storage tank and the high pressure reactor 34.
According to some embodiments of the present invention, the drilling fluid pumping system 104 further comprises a second valve 14 disposed on the pipeline between the high pressure reactor 34 and the fluid flow meter 13.
According to some embodiments of the present invention, the back pressure relief system 106 comprises a back pressure valve 22 connected to the inlet/outlet vent 10 via a pipeline.
According to some embodiments of the present invention, the gas control system 105 comprises a gas source storage tank 1, a buffer tank 25 and a vacuum pump 4 which are sequentially connected through a high pressure pipeline, wherein the buffer tank and the vacuum pump are respectively connected with a gas inlet/outlet hole 10 through pipelines, the gas control system 105 further comprises a first pressure gauge 2 arranged at an outlet position of the gas source storage tank 1, a first needle valve 3 arranged on a pipeline between the first pressure gauge and the buffer tank 25, a second pressure gauge 5 arranged on the buffer tank, a second needle valve 26 and a third needle valve 28 sequentially arranged on a pipeline between the buffer tank and a high pressure reaction kettle 34, and a fourth needle valve 8, and the vacuum pump 4 is sequentially connected with the gas inlet/outlet hole through the fourth needle valve and the third needle valve through pipelines; the back pressure valve 22 is connected to the inlet/outlet port through a line sequence via the first valve 11 and the third needle valve 28.
According to some embodiments of the present invention, the data acquisition system 107 comprises a temperature sensor 39 disposed at the bottom of the autoclave 34, a pressure sensor 9 disposed at the sidewall of the autoclave, and a computer 37 electrically connected to the temperature sensor and the pressure sensor.
According to some embodiments of the present invention, the number of the temperature sensors 39 is four.
According to some embodiments of the present invention, the bottom of the autoclave 34 is provided with a quartz sand/shale core holding tank 20.
According to some embodiments of the present invention, the side wall of the autoclave 34 is opened with 1 to 2 transparent observation windows 32.
According to some embodiments of the present invention, the autoclave 34 has 2 transparent windows 32 on the sidewall. One of the transparent observation windows is a main observation window, and the other transparent observation window is an auxiliary observation window.
In another aspect, the present invention further provides a method for simulating the invasion of drilling fluid into a reservoir to induce hydrate decomposition, wherein the method comprises the following steps:
(1) feeding quartz sand or a argillaceous core, water and required gas into a high-pressure reaction kettle, and adjusting the pressure and the temperature in the high-pressure reaction kettle to enable hydrates to be formed in pores of the quartz sand or the argillaceous core in a low-temperature and high-pressure environment to obtain a simulated hydrate reservoir stratum;
(2) the drilling fluid is invaded into a simulated hydrate reservoir inside a high-pressure reaction kettle in a constant-temperature, quantitative and constant-speed mode;
(3) the method comprises the steps of collecting temperature and pressure data in the high-pressure reaction kettle in real time, observing experimental phenomena in the high-pressure reaction kettle through temperature and pressure and visual observation, and analyzing influences of different drilling fluid invasion conditions on hydrate decomposition in a simulated reservoir.
According to some embodiments of the invention, in the step (1), the hydrate is formed in the pores of the quartz sand or the argillaceous core under an environment with a temperature of 0 to 15 ℃ and a pressure of 5 to 20 MPa.
According to some embodiments of the invention, the desired gas of step (1) is selected from one or more of natural gas, methane, nitrogen or carbon dioxide.
According to some specific embodiments of the invention, in the step (2), the drilling fluid at 230 ℃ is invaded into the simulated hydrate reservoir in the high-pressure reaction kettle at a constant temperature and constant speed of 5-20mL/min, and the dosage of the drilling fluid is 10-200 mL.
According to some embodiments of the invention, the method is performed using the apparatus of any one of the present invention, comprising:
a. installing the device and checking the air tightness of the device;
b. feeding quartz sand or a argillaceous rock core, water and required gas into a high-pressure reaction kettle 34, and vacuumizing the high-pressure reaction kettle;
c. the temperature in the high-pressure reaction kettle is adjusted to be set by using the high-low temperature water bath temperature control system 102 and the high-low temperature constant temperature air bath box 21, and the temperature and the pressure in the high-pressure reaction kettle are monitored and recorded by the data acquisition system 107;
d. injecting the required gas into the high-pressure reaction kettle by using the gas control system 105, and judging whether the hydrate is completely formed or not by monitoring and analyzing the temperature and pressure change conditions in the high-pressure reaction kettle;
e. the drilling fluid is pumped into the system 104 by the drilling fluid to invade the drilling fluid into a simulated hydrate reservoir stratum inside the high-pressure reaction kettle in a constant-temperature, quantitative and constant-speed mode;
f. the method comprises the steps of collecting temperature and pressure data in the high-pressure reaction kettle in real time, observing experimental phenomena in the high-pressure reaction kettle through temperature and pressure and visual observation, and analyzing influences of different drilling fluid invasion conditions on hydrate decomposition in a simulated reservoir.
According to some embodiments of the present invention, the gas control system 105 comprises a gas source storage tank 1, a buffer tank 25 and a vacuum pump 4 which are sequentially connected through a high pressure pipeline, wherein the buffer tank and the vacuum pump are respectively connected with the gas inlet/outlet hole 10 through pipelines, the gas control system 105 further comprises a first pressure gauge 2 arranged at an outlet position of the gas source storage tank 1, a first needle valve 3 arranged on a pipeline between the first pressure gauge and the buffer tank 25, a second pressure gauge 5 arranged on the buffer tank, a second needle valve 26 and a third needle valve 28 sequentially arranged on a pipeline between the buffer tank and the high pressure reaction kettle 34, and a fourth needle valve 8, and the vacuum pump 4 is sequentially connected with the gas inlet/outlet hole 10 through a fourth needle valve and a third needle valve through pipelines; the high-low temperature water bath temperature control system 102 comprises a constant temperature liquid circulating pump 23, a water bath jacket 24 arranged on the outer layer of the buffer tank, a water bath 36 and a cooling liquid circulating pump 35 arranged in the water bath, wherein the constant temperature liquid circulating pump is connected with the water bath jacket and the water bath through a heat insulation pipeline, and a high-pressure reaction kettle 34 is arranged in the water bath; the drilling fluid pumping system 104 comprises a constant flow pump 12 and a drilling fluid storage tank 6 which are sequentially connected through a pipeline, a piston 27 is arranged in the drilling fluid storage tank, the reciprocating motion of the piston is controlled by the constant flow pump, the drilling fluid storage tank is communicated with the inside of the high-pressure reaction kettle 34 through the pipeline and a drilling fluid immersion hole 38 arranged at the top of the reaction kettle 34, the drilling fluid pumping system 104 further comprises a third pressure gauge 7 arranged on the drilling fluid storage tank 6, a liquid flow meter 13 arranged on the pipeline between the drilling fluid storage tank and the high-pressure reaction kettle 34, and a second valve 14 arranged on the pipeline between the high-pressure reaction kettle 34 and the liquid flow meter 13; the back pressure unloading system 106 comprises a back pressure valve 22 connected with the air inlet/outlet hole 10 through a pipeline, and the back pressure valve 22 is connected with the air inlet/outlet hole through a first valve 11 and a third needle valve 28 in sequence through a pipeline; the bottom of the high-pressure reaction kettle 34 is provided with a quartz sand/argillaceous rock core containing groove 20, and the side wall of the high-pressure reaction kettle 34 is provided with 1-2 transparent observation windows 32;
the method comprises the following steps:
a. mounting and checking the airtightness of the device: closing the first valve 11, opening the gas source storage tank 1, introducing the required gas into the high-pressure reaction kettle 34, pressurizing to 15MPa, maintaining the pressure, observing for 12 hours, checking the air tightness of all needle valves, pipelines and the high-pressure reaction kettle, and checking whether the experimental device has leakage;
b. vacuumizing the pipeline, the buffer tank 25 and the high-pressure reaction kettle: after the experimental device is checked to be free of leakage, quartz sand or a argillaceous core and water are filled into a quartz sand/argillaceous core containing groove 20 in the high-pressure reaction kettle; opening the first valve 11, the first needle valve 3, the second needle valve 26, the third needle valve 28 and the fourth needle valve 8, and then opening the vacuum pump 4 to vacuumize the high-pressure pipeline, the buffer tank and the high-pressure reaction kettle for 30min so as to ensure that no other gas exists in the pipeline, the buffer tank and the high-pressure reaction kettle; then closing all valves in the experimental system;
c. preparation before the start of the experiment: opening the first needle valve, introducing the required gas into the buffer tank, enabling the pressure of the gas to reach a certain value, and then closing the gas source storage tank and the first needle valve; filling drilling fluid into the drilling fluid storage tank; starting the high-low temperature constant-temperature air bath box 21, the constant-temperature water bath circulating pump 23 and the cooling liquid circulating pump 35, setting the cooling temperature, and starting cooling; after the internal temperature of the high-pressure reaction kettle, the temperature of the gas in the buffer tank and the temperature of the drilling fluid in the drilling fluid storage tank are all reduced to the target temperature and kept balanced, the computer 37 is started, and the temperature and the pressure in the high-pressure reaction kettle are monitored and recorded through the pressure sensor 9 and the temperature sensor 39;
d. opening the second needle valve and the third needle valve to enable the gas in the buffer tank to enter the high-pressure reaction kettle, enabling the gas and the water to form a hydrate in the high-pressure reaction kettle under the condition of constant pressure, and judging whether the hydrate is completely formed or not by monitoring and analyzing the temperature and pressure change conditions in the high-pressure reaction kettle; after the hydrate in the reaction kettle is completely formed, closing the second needle valve and the third needle valve;
e. the piston 27 is pushed by the constant flow pump 12, so that the pressure in the drilling fluid storage tank is slightly higher than the pressure in the high-pressure reaction kettle; opening a second valve 14 to enable the constant-temperature drilling fluid to quantitatively invade a simulated hydrate reservoir stratum in the high-pressure reaction kettle through a liquid flowmeter 13 in a constant-speed mode;
f. the influence of different drilling fluid invasion conditions on the decomposition of hydrates in a reservoir is analyzed by monitoring the change conditions of the pressure and the temperature in the high-pressure reaction kettle and observing the experimental phenomenon in the high-pressure reaction kettle through the transparent observation window 32 on the high-pressure reaction kettle.
In conclusion, the invention provides a device and a method for simulating drilling fluid to invade a reservoir stratum to induce hydrate decomposition. The device and the method of the invention have the following advantages:
1. the invention can carry out quantitative simulation on the temperature, the quantity and the speed of the drilling fluid invading the hydrate reservoir. Analyzing and evaluating whether hydrate decomposition can be caused under different drilling fluid invasion conditions or the decomposition degree of hydrate in a reservoir through the condition change of temperature and pressure in the high-pressure reaction kettle and the experimental phenomenon in the high-pressure reaction kettle, thereby obtaining the safe and unsafe conditions of the drilling fluid invading the hydrate reservoir;
2. the drilling fluid and the hydrate reservoir can be positioned in different temperature fields through the cooperation of the air bath and the water bath temperature control device, the drilling fluid and the hydrate reservoir can be positioned in different pressure fields through the gas pressure control device, the advection pump and the piston pressure container, and the invasion of the drilling fluid to the hydrate reservoir under different conditions is simulated under the cooperation of all parts of the experimental device; the second is that different parts of the experimental device can be under different temperature and pressure field conditions, which is consistent with the actual hydrate drilling construction condition, and the temperature and pressure are convenient to control; thirdly, the system has simple and reliable structure, convenient operation and strong experiment repeatability;
3. the research has important reference value on the precooling treatment of the hydrate drilling fluid, provides more reliable guarantee for the safe drilling of the hydrate in frozen soil and ocean areas, and has important economic and social benefits on the exploration and development of the natural gas hydrate in China;
4. the research can also be used for hydrate scientific experiments and researches of related scientific research institutions, and provides drilling fluid testing devices and technical services for enterprises and scientific research institutions related to petroleum drilling and geological exploration.
Drawings
FIG. 1 is a schematic diagram showing the connections of the systems of the apparatus according to embodiment 1 of the present invention;
fig. 2 is a schematic connection diagram showing a specific structure of the apparatus according to embodiment 1 of the present invention.
Detailed Description
The following detailed description is provided for the purpose of illustrating the embodiments and the advantageous effects thereof, and is not intended to limit the scope of the present disclosure.
Example 1
As shown in fig. 1 and fig. 2, the experimental apparatus for simulating the invasion of drilling fluid into a reservoir to induce hydrate decomposition according to the embodiment of the present invention includes a high-pressure reactor 34 for providing drilling fluid to react with natural gas to form hydrate, a constant temperature liquid circulating pump 23 for providing a temperature environment of a simulated hydrate reservoir, a fully transparent water bath 36 and a cooling liquid circulating pump 35, a high-low temperature constant temperature air bath 21 for providing a temperature environment of simulated drilling fluid, a drilling fluid invasion system, a gas control system, a back pressure unloading system and a data acquisition system, wherein: the high-pressure reaction kettle 34 is placed in a full transparent water bath 36, and first (second) transparent windows 32 are arranged on two sides of the high-pressure reaction kettle 34, wherein the first transparent window is a main observation window, and the second transparent window is an auxiliary observation window; a quartz sand/argillaceous rock core containing groove 20 with four round holes is arranged in the inner cavity of the high-pressure reaction kettle 34;
the upper part of the high-pressure reaction kettle 34 is provided with an air inlet/outlet hole and is connected with a gas control system and a back pressure unloading system through a high-pressure pipeline, a data acquisition system comprises a first temperature sensor 29, a second temperature sensor 30, a third temperature sensor 31, a fourth temperature sensor 33, a pressure sensor 9, a data acquisition signal line and a computer 37, the first temperature sensor 29, the second temperature sensor 30, the third temperature sensor 31 and the fourth temperature sensor 33 are arranged at the bottom of the high-pressure reaction kettle 34 and penetrate through four round holes on the quartz sand/argillaceous rock core containing groove 20, the pressure sensor 9 is arranged at the upper part of the high-pressure reaction kettle 34, the first temperature sensor 29, the second temperature sensor 30, the third temperature sensor 31, the fourth temperature sensor 33 and the pressure sensor 12 are connected with a computer 37 through data acquisition signal lines.
The gas control system comprises a gas source 1, a buffer tank 25 wrapped with a water bath jacket 24, a vacuum pump 4, a first pressure gauge 2, a second pressure gauge 5, a first needle valve 3, a second needle valve 26, a third needle valve 28, a fourth needle valve 8 and a high-pressure pipeline, wherein the gas source 1 is connected into the buffer tank 25 through the first pressure gauge 2 and the first needle valve 3 in sequence by the high-pressure pipeline, and the buffer tank 15 is connected into the gas inlet/outlet hole 10 at the upper part of the high-pressure reaction kettle 34 through the second pressure gauge 5, the second needle valve 26 and the third needle valve 28 in sequence by the high-pressure pipeline; the vacuum pump 4 is also connected to the inlet/outlet hole 10 at the upper part of the autoclave 34 via a high-pressure line via a fourth needle valve 8. Gas in the gas source 1 sequentially passes through the first pressure gauge 2 and the first needle valve 3 to enter the buffer tank 25, and then sequentially passes through the second pressure gauge 5, the second needle valve 26, the third needle valve 28 and the gas inlet/outlet hole 10 at the upper part of the high-pressure reaction kettle 34 to enter the high-pressure reaction kettle 34; air inside the autoclave 34 under normal pressure is pumped out by the vacuum pump 4 through the inlet/outlet hole 10, the third needle valve 28 and the fourth needle valve 8 in the upper portion of the autoclave 34.
The drilling fluid invasion system comprises a constant-flow pump 12, a drilling fluid storage tank 6, a piston 27, a third pressure gauge 7, a liquid flow meter 13, a first drilling fluid invasion hole 15, a second drilling fluid invasion hole 16, a third drilling fluid invasion hole 17, a fourth drilling fluid invasion hole 18, a fifth drilling fluid invasion hole 19, a valve 14 and a high-pressure pipeline, wherein the constant-flow pump 12 is connected into the drilling fluid storage tank 6 through the high-pressure pipeline and controls the piston 27, and the drilling fluid storage tank 6 is connected into the first drilling fluid invasion hole 15, the second drilling fluid invasion hole 16, the third drilling fluid invasion hole 17, the fourth drilling fluid invasion hole 18 and the fifth drilling fluid invasion hole 19 which are arranged at the top of the reaction kettle through the high-pressure pipeline sequentially through the third pressure gauge 7, the valve 14 and the liquid flow meter 13. The drilling fluid in the drilling fluid storage tank 6 sequentially passes through a third pressure gauge 7, a valve 14, a liquid flow meter 13, a first drilling fluid invasion hole 15, a second drilling fluid invasion hole 16, a third drilling fluid invasion hole 17, a fourth drilling fluid invasion hole 18 and a fifth drilling fluid invasion hole 19 at the top of a high-pressure reaction kettle 34 and enters the high-pressure reaction kettle 34.
The back pressure unloading system comprises an exhaust pipeline connected with the air inlet/outlet hole 10 at the upper part of the high-pressure reaction kettle 34, a valve 11 and a back pressure valve 22, wherein the valve 11 and the back pressure valve 22 are arranged on the exhaust pipeline. When the back pressure is unloaded, the gas in the high-pressure reaction kettle 34 is discharged out of the experimental device through the gas inlet/outlet hole 10, the gas exhaust pipeline, the valve 11 and the back pressure valve 22 on the upper part of the high-pressure reaction kettle 34 in sequence.
The high-pressure reaction kettle 34 mainly comprises a reaction kettle body, a reaction kettle upper end cover and a first (second) transparent window 32, wherein the reaction kettle upper end cover is connected with the end face of the top of the reaction kettle body in a compaction and sealing mode through a sealing ring and a bolt.
Four small holes are arranged at the bottom of the high-pressure reaction kettle 34, and the first temperature sensor 29, the second temperature sensor 30, the third temperature sensor 31 and the fourth temperature sensor 33 are respectively inserted into the small holes.
Both sides of the high-low temperature constant temperature air bath box 21 are openable side doors provided with transparent windows so as to observe the experimental phenomenon inside the high-pressure reaction kettle 34.
The method for simulating the invasion of the drilling fluid into the reservoir to induce the hydrate decomposition by the experimental device comprises the following steps:
(1) feeding the holding tank 20 filled with the quartz sand or the argillaceous core, water and required gas into a high-pressure reaction kettle 34, and adjusting the pressure and the temperature in the high-pressure reaction kettle 34 to enable the hydrate to be formed in pores of the quartz sand or the argillaceous core in a low-temperature and high-pressure environment so as to simulate a hydrate reservoir;
(2) by adjusting the drilling fluid pumping system, the drilling fluid is invaded into the simulated hydrate reservoir stratum in the high-pressure reaction kettle 34 in a constant-temperature, quantitative and constant-speed mode;
(3) the temperature and pressure data in the high-pressure reaction kettle 34 are collected in real time, the experimental phenomenon in the high-pressure reaction kettle 34 is observed through the temperature, the pressure and the first (second) transparent window 32 on the high-pressure reaction kettle 34, and the influence of different drilling fluid invasion conditions on the decomposition of hydrate in the simulated reservoir is analyzed.
The concrete steps of simulating the invasion of the drilling fluid into the reservoir and analyzing the influence of the drilling fluid on the decomposition of the hydrate in the step (3) are as follows:
a. installation and air tightness detection of the experimental device: closing a valve 11 on the back pressure unloading system, opening a gas source 1, introducing required gas into the high-pressure reaction kettle 34, pressurizing to 15MPa, maintaining the pressure, observing for 12 hours, checking the air tightness of all needle valves, gas pipelines and the high-pressure reaction kettle 34, and checking whether the experimental device has leakage;
b. vacuumizing the pipeline, the buffer tank and the high-pressure reaction kettle: after the experimental device is checked to be free of leakage, quartz sand or a argillaceous core and water are filled into the quartz sand/argillaceous core containing groove 20 in the high-pressure reaction kettle 34; opening a valve 11 of a back pressure unloading system and a first needle valve 3, a second needle valve 26, a third needle valve 28 and a fourth needle valve 8 of a gas control system, and then opening a vacuum pump 4 to perform vacuum pumping treatment on the high-pressure pipeline, the buffer tank 25 and the high-pressure reaction kettle 34 for 30min so as to ensure that no other gas exists in the pipeline, the buffer tank 25 and the high-pressure reaction kettle 34; then closing all valves in the experimental system;
c. preparation before the start of the experiment: opening the first needle valve 3, introducing gas into the buffer tank 25 to enable the pressure of the gas to reach a certain value, and then closing the gas source 1 and the first needle valve 3; filling drilling fluid into the drilling fluid storage tank 6; starting the high-low temperature constant-temperature air bath box 21, the constant-temperature water bath circulating pump 23 and the cooling liquid circulating pump 35, setting the cooling temperature, and starting cooling; after the internal temperature of the high-pressure reaction kettle 34, the gas in the buffer tank 25 and the drilling fluid in the drilling fluid storage tank 6 are all reduced to the target temperature and kept balanced, the computer 37 is started, and the temperature and the pressure in the high-pressure reaction kettle 34 are monitored and recorded through the pressure sensor 9, the first temperature sensor 29, the second temperature sensor 30, the third temperature sensor 31 and the fourth temperature sensor 33;
d. after the work is finished, opening the second needle valve 26 and the third needle valve 28, enabling the gas in the buffer tank 25 to enter the high-pressure reaction kettle 34, enabling the gas and the water to form a hydrate in the high-pressure reaction kettle 34 under the condition of constant pressure, and judging whether the hydrate is completely formed or not by monitoring and analyzing the temperature and pressure change conditions in the high-pressure reaction kettle 34; after the hydrate in the reaction kettle 34 is completely formed, closing the second needle valve 26 and the third needle valve 28;
e. the piston 27 is pushed by the constant flow pump 12, so that the pressure in the drilling fluid storage tank 6 is slightly higher than the pressure in the high-pressure reaction kettle 34; opening a valve 14 of the drilling fluid pumping system to enable the constant-temperature drilling fluid to quantitatively invade a simulated hydrate reservoir stratum in the high-pressure reaction kettle 34 through the liquid flowmeter 13 in a constant-speed mode; the influence of different drilling fluid invasion conditions on the decomposition of hydrates in a reservoir is analyzed by monitoring the change conditions of the pressure and the temperature in the high-pressure reaction kettle 34 and observing the experimental phenomenon in the high-pressure reaction kettle 34 through the first (second) transparent window 32 on the high-pressure reaction kettle.
After the experiment is finished, opening a valve 11 and a back pressure valve 22 on an exhaust pipeline in a back pressure unloading system connected with an air inlet/outlet hole 10 at the upper part of the high-pressure reaction kettle 34 to relieve the pressure of the experimental device until the pressure of the experimental device is reduced to the atmospheric pressure; the piston 27 is controlled by the constant flow pump 12 so that the pressure in the drilling fluid storage tank 6 is likewise reduced to atmospheric pressure.
By repeating the operations, the influence of the drilling fluid with different temperatures, amounts and rates on the decomposition capability and the decomposition degree of the hydrate when the drilling fluid invades into the hydrate reservoir can be observed, and the research result has great reference and reference value for the exploration and development of the hydrate.
Claims (20)
1. A device for simulating drilling fluid to invade a reservoir stratum to induce hydrate decomposition comprises a high-pressure reaction kettle (34), a high-low temperature water bath temperature control system (102), a high-low temperature constant-temperature air bath box (21), a drilling fluid pumping system (104), a gas control system (105), a back pressure unloading system (106) and a data acquisition system (107); the reaction kettle is arranged in the high-low temperature constant-temperature air bath box, the reaction temperature of the reaction kettle and the gas temperature in the gas control system are respectively controlled by the high-low temperature water bath temperature control system, the drilling fluid pumping system is connected with the reaction kettle through a pipeline, the back pressure unloading system and the gas control system are respectively communicated with the interior of the reaction kettle through a pipeline and an air inlet/outlet hole (10) formed in the upper portion of the reaction kettle, the back pressure unloading system is used for respectively controlling the pressure balance of the reaction kettle, the gas control system and the outside, and the data acquisition system is electrically connected with the reaction kettle and used for collecting the reaction data of the reaction kettle.
2. The apparatus of claim 1, wherein the gas control system (105) comprises a gas source storage tank (1), a buffer tank (25) and a vacuum pump (4) connected in series by high pressure lines, the buffer tank and the vacuum pump being connected to the gas inlet/outlet hole (10) via lines, respectively.
3. The apparatus according to claim 2, wherein the gas control system (105) further comprises a first pressure gauge (2) disposed at an outlet position of the gas source tank (1), a first needle valve (3) disposed on a pipeline between the first pressure gauge and the buffer tank (25), a second pressure gauge (5) disposed on the buffer tank, a second needle valve (26) and a third needle valve (28) sequentially disposed on a pipeline between the buffer tank and the high pressure reaction vessel (34), and a fourth needle valve (8), and the vacuum pump (4) is connected to the gas inlet/outlet hole (10) through the fourth needle valve and the third needle valve sequentially via the pipeline.
4. The device according to claim 2 or 3, wherein the high-temperature and low-temperature water bath temperature control system (102) comprises a constant temperature liquid circulating pump (23), a water bath jacket (24) arranged on the outer layer of the buffer tank, a water bath (36) and a cooling liquid circulating pump (35) arranged in the water bath, the constant temperature liquid circulating pump is connected with the water bath jacket and the water bath through heat insulation pipelines, and the high-pressure reaction kettle (34) is arranged in the water bath.
5. The device according to any one of claims 1 to 4, wherein the drilling fluid pumping system (104) comprises a constant flow pump (12) and a drilling fluid storage tank (6) which are sequentially connected through a pipeline, a piston (27) is arranged in the drilling fluid storage tank, the reciprocating motion of the piston is controlled by the constant flow pump, and the drilling fluid storage tank is communicated with the interior of the high-pressure reaction kettle (34) through the pipeline and a drilling fluid immersion hole (38) arranged at the top of the reaction kettle (34).
6. The device according to claim 5, wherein said immersion holes (38) are five.
7. The apparatus of claim 5, wherein the drilling fluid pumping system (104) further comprises a third pressure gauge (7) disposed on the drilling fluid storage tank (6), a liquid flow meter (13) disposed on the line between the drilling fluid storage tank and the high pressure autoclave (34).
8. The apparatus of claim 7, wherein the drilling fluid pumping system (104) further comprises a second valve (14) disposed in the line between the high pressure autoclave (34) and the fluid flow meter (13).
9. The device according to any one of claims 1 to 8, wherein the back pressure unloading system (106) comprises a back pressure valve (22) connected with the air inlet/outlet hole (10) through a pipeline.
10. The apparatus of claim 8, wherein the gas control system (105) comprises a gas source storage tank (1), a buffer tank (25) and a vacuum pump (4) connected in series by high pressure lines, the buffer tank and the vacuum pump being connected to the gas inlet/outlet hole (10) via lines, respectively, the gas control system (105) also comprises a first pressure gauge (2) arranged at the outlet position of the gas source storage tank (1), a first needle valve (3) arranged on a pipeline between the first pressure gauge and the buffer tank (25), a second pressure gauge (5) arranged on the buffer tank, a second needle valve (26), a third needle valve (28) and a fourth needle valve (8) which are sequentially arranged on the pipeline between the buffer tank and the high-pressure reaction kettle (34), the vacuum pump (4) is connected with the air inlet/outlet hole through a fourth needle valve and a third needle valve in sequence through a pipeline; the back pressure valve (22) is connected with an air inlet/outlet hole through a first valve (11) and a third needle valve (28) in sequence through pipelines.
11. The device according to any one of claims 1 to 10, wherein the data acquisition system (107) comprises a temperature sensor (39) arranged at the bottom of the high-pressure reaction kettle (34), a pressure sensor (9) arranged on the side wall of the high-pressure reaction kettle, and a computer (37) electrically connected with the temperature sensor and the pressure sensor.
12. The device according to claim 11, wherein the temperature sensors (39) are four.
13. The device according to any one of claims 1 to 12, wherein a quartz sand/shale core holding tank (20) is arranged at the bottom of the high-pressure reaction kettle (34).
14. The device as claimed in any one of claims 1 to 13, wherein 1 to 2 transparent observation windows (32) are arranged on the side wall of the high-pressure reaction kettle (34).
15. A method of simulating drilling fluid invasion into a reservoir induced hydrate dissociation, wherein the method comprises the steps of:
(1) feeding quartz sand or a argillaceous core, water and required gas into a high-pressure reaction kettle, and adjusting the pressure and the temperature in the high-pressure reaction kettle to enable hydrates to be formed in pores of the quartz sand or the argillaceous core in a low-temperature and high-pressure environment to obtain a simulated hydrate reservoir stratum;
(2) the drilling fluid is invaded into a simulated hydrate reservoir inside a high-pressure reaction kettle in a constant-temperature, quantitative and constant-speed mode;
(3) the method comprises the steps of collecting temperature and pressure data in the high-pressure reaction kettle in real time, observing experimental phenomena in the high-pressure reaction kettle through temperature and pressure and visual observation, and analyzing influences of different drilling fluid invasion conditions on hydrate decomposition in a simulated reservoir.
16. The method as claimed in claim 15, wherein the step (1) is to form the hydrate in the pores of the quartz sand or the argillaceous core under an environment of a temperature of 0-15 ℃ and a pressure of 5-20 MPa.
17. The method of claim 15, wherein the desired gas of step (1) is selected from a mixture of one or more of natural gas, methane, nitrogen, or carbon dioxide.
18. The method of claim 15, wherein the step (2) is implemented by invading the drilling fluid with the temperature of 2-30 ℃ into the simulated hydrate reservoir in the high-pressure reaction kettle at the constant temperature and the constant speed of 5-20mL/min, and the dosage of the drilling fluid is 10-200 mL.
19. A method according to any one of claims 15 to 18, wherein the method is carried out using an apparatus according to any one of claims 1 to 14, comprising:
a. installing the device and checking the air tightness of the device;
b. quartz sand or a argillaceous rock core, water and required gas are fed into a high-pressure reaction kettle (34), and the high-pressure reaction kettle is vacuumized;
c. the temperature in the high-pressure reaction kettle is adjusted to be set by using a high-low temperature water bath temperature control system (102) and a high-low temperature constant temperature air bath box (21), and the temperature and the pressure in the high-pressure reaction kettle are monitored and recorded by a data acquisition system (107);
d. injecting required gas into the high-pressure reaction kettle by using a gas control system (105), and judging whether the hydrate is completely formed or not by monitoring and analyzing the temperature and pressure change conditions in the high-pressure reaction kettle;
e. the drilling fluid is pumped into a system (104) by a drilling fluid pumping system to invade the drilling fluid into a simulated hydrate reservoir stratum inside the high-pressure reaction kettle in a constant-temperature, quantitative and constant-speed mode;
f. the method comprises the steps of collecting temperature and pressure data in the high-pressure reaction kettle in real time, observing experimental phenomena in the high-pressure reaction kettle through temperature and pressure and visual observation, and analyzing influences of different drilling fluid invasion conditions on hydrate decomposition in a simulated reservoir.
20. The method according to claim 19, wherein the gas control system (105) comprises a gas source storage tank (1), a buffer tank (25) and a vacuum pump (4) which are connected in sequence by high-pressure pipelines, the buffer tank and the vacuum pump are respectively connected with the gas inlet/outlet hole (10) by pipelines, the gas control system (105) also comprises a first pressure gauge (2) arranged at the outlet position of the gas source storage tank (1), a first needle valve (3) arranged on a pipeline between the first pressure gauge and the buffer tank (25), a second pressure gauge (5) arranged on the buffer tank, a second needle valve (26), a third needle valve (28) and a fourth needle valve (8) which are sequentially arranged on the pipeline between the buffer tank and the high-pressure reaction kettle (34), the vacuum pump (4) is connected with the air inlet/outlet hole (10) through a fourth needle valve and a third needle valve in sequence through a pipeline; the high-low temperature water bath temperature control system (102) comprises a constant temperature liquid circulating pump (23), a water bath jacket (24) arranged on the outer layer of the buffer tank, a water bath (36) and a cooling liquid circulating pump (35) arranged in the water bath, wherein the constant temperature liquid circulating pump is connected with the water bath jacket and the water bath through a heat insulation pipeline, and a high-pressure reaction kettle (34) is arranged in the water bath; the drilling fluid pumping system (104) comprises a constant flow pump (12) and a drilling fluid storage tank (6) which are sequentially connected through a pipeline, a piston (27) is arranged in the drilling fluid storage tank, the reciprocating motion of the piston is controlled through the constant flow pump, the drilling fluid storage tank is communicated with the inside of a high-pressure reaction kettle (34) through a pipeline and a drilling fluid immersion hole (38) formed in the top of the reaction kettle (34), the drilling fluid pumping system (104) further comprises a third pressure gauge (7) arranged on the drilling fluid storage tank (6), a liquid flow meter (13) arranged on the pipeline between the drilling fluid storage tank and the high-pressure reaction kettle (34), and a second valve (14), and the second valve is arranged on the pipeline between the high-pressure reaction kettle (34) and the liquid flow meter (13); the back pressure unloading system (106) comprises a back pressure valve (22) connected with the air inlet/outlet hole (10) through a pipeline, and the back pressure valve (22) is sequentially connected with the air inlet/outlet hole through a first valve (11) and a third needle valve (28) through a pipeline; the bottom of the high-pressure reaction kettle (34) is provided with a quartz sand/argillaceous rock core containing groove (20), and the side wall of the high-pressure reaction kettle (34) is provided with 1-2 transparent observation windows (32);
the method comprises the following steps:
a. mounting and checking the airtightness of the device: closing the first valve (11), opening the gas source storage tank (1), introducing the required gas into the high-pressure reaction kettle (34), pressurizing to 15MPa, maintaining the pressure, observing for 12 hours, checking the air tightness of all needle valves, pipelines and the high-pressure reaction kettle, and checking whether the experimental device has leakage;
b. vacuumizing the pipeline, the buffer tank (25) and the high-pressure reaction kettle: after the experimental device is checked to be free of leakage, quartz sand or a argillaceous core and water are filled into a quartz sand/argillaceous core containing groove (20) in the high-pressure reaction kettle; opening a first valve (11), a first needle valve (3), a second needle valve (26), a third needle valve (28) and a fourth needle valve (8), and then opening a vacuum pump (4) to vacuumize the high-pressure pipeline, the buffer tank and the high-pressure reaction kettle for 30min so as to ensure that no other gas exists in the pipeline, the buffer tank and the high-pressure reaction kettle; then closing all valves in the experimental system;
c. preparation before the start of the experiment: opening the first needle valve, introducing the required gas into the buffer tank, enabling the pressure of the gas to reach a certain value, and then closing the gas source storage tank and the first needle valve; filling drilling fluid into the drilling fluid storage tank; starting the high-low temperature constant-temperature air bath box (21), the constant-temperature water bath circulating pump (23) and the cooling liquid circulating pump (35), setting the cooling temperature, and starting cooling; after the internal temperature of the high-pressure reaction kettle, the temperature of the gas in the buffer tank and the temperature of the drilling fluid in the drilling fluid storage tank are all reduced to the target temperature and kept balanced, the computer (37) is started, and the temperature and the pressure in the high-pressure reaction kettle are monitored and recorded through the pressure sensor (9) and the temperature sensor (39);
d. opening the second needle valve and the third needle valve to enable the gas in the buffer tank to enter the high-pressure reaction kettle, enabling the gas and the water to form a hydrate in the high-pressure reaction kettle under the condition of constant pressure, and judging whether the hydrate is completely formed or not by monitoring and analyzing the temperature and pressure change conditions in the high-pressure reaction kettle; after the hydrate in the reaction kettle is completely formed, closing the second needle valve and the third needle valve;
e. a constant flow pump (12) is utilized to push a piston (27) to ensure that the pressure in the drilling fluid storage tank is slightly higher than the pressure in the high-pressure reaction kettle; opening a second valve (14) to enable the constant-temperature drilling fluid to quantitatively invade a simulated hydrate reservoir stratum in the high-pressure reaction kettle through a liquid flowmeter (13) in a constant-speed mode;
f. the influence of different drilling fluid invasion conditions on the decomposition of hydrates in a reservoir is analyzed by monitoring the change conditions of the pressure and the temperature in the high-pressure reaction kettle and observing the experimental phenomenon in the high-pressure reaction kettle through a transparent observation window (32) on the high-pressure reaction kettle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910628749.3A CN112211599B (en) | 2019-07-12 | 2019-07-12 | Device and method for simulating drilling fluid to invade reservoir to induce hydrate decomposition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910628749.3A CN112211599B (en) | 2019-07-12 | 2019-07-12 | Device and method for simulating drilling fluid to invade reservoir to induce hydrate decomposition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112211599A true CN112211599A (en) | 2021-01-12 |
| CN112211599B CN112211599B (en) | 2024-07-26 |
Family
ID=74048532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910628749.3A Active CN112211599B (en) | 2019-07-12 | 2019-07-12 | Device and method for simulating drilling fluid to invade reservoir to induce hydrate decomposition |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112211599B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115112845A (en) * | 2022-08-23 | 2022-09-27 | 中石化胜利石油工程有限公司钻井工艺研究院 | System and method for detecting oil-based drilling fluid performance |
| CN115717517A (en) * | 2022-11-30 | 2023-02-28 | 北京探矿工程研究所 | Evaluation device and experimental method for influence of simulated drilling on hydrate decomposition inhibition performance |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101376853A (en) * | 2008-09-09 | 2009-03-04 | 中国石油大学(北京) | Method and apparatus for simulating gas hydrate accumulation process under one-dimensional condition |
| CN101532936A (en) * | 2009-04-14 | 2009-09-16 | 中国地质大学（武汉） | Method and device for evaluating inhibiting ability of drilling fluid on formation and decomposition of hydrate |
| CN102323394A (en) * | 2011-08-23 | 2012-01-18 | 中国地质大学（武汉） | Experimental apparatus and method for researching response characteristic of natural gas hydrate stratum to drilling fluid intrusion |
| CN102678090A (en) * | 2011-03-16 | 2012-09-19 | 中国海洋石油总公司 | Three-dimensional synthesizing and mining simulation device for natural gas hydrate |
| CN102865066A (en) * | 2012-10-16 | 2013-01-09 | 中国石油大学(华东) | Experiment device and method for deepwater shaft multiphase flow containing natural gas hydrate phase changes |
| CN210714627U (en) * | 2019-07-12 | 2020-06-09 | 中国石油天然气集团有限公司 | Device for simulating drilling fluid to invade reservoir stratum to induce hydrate decomposition |
-
2019
- 2019-07-12 CN CN201910628749.3A patent/CN112211599B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101376853A (en) * | 2008-09-09 | 2009-03-04 | 中国石油大学(北京) | Method and apparatus for simulating gas hydrate accumulation process under one-dimensional condition |
| CN101532936A (en) * | 2009-04-14 | 2009-09-16 | 中国地质大学（武汉） | Method and device for evaluating inhibiting ability of drilling fluid on formation and decomposition of hydrate |
| CN102678090A (en) * | 2011-03-16 | 2012-09-19 | 中国海洋石油总公司 | Three-dimensional synthesizing and mining simulation device for natural gas hydrate |
| CN102323394A (en) * | 2011-08-23 | 2012-01-18 | 中国地质大学（武汉） | Experimental apparatus and method for researching response characteristic of natural gas hydrate stratum to drilling fluid intrusion |
| CN102865066A (en) * | 2012-10-16 | 2013-01-09 | 中国石油大学(华东) | Experiment device and method for deepwater shaft multiphase flow containing natural gas hydrate phase changes |
| CN210714627U (en) * | 2019-07-12 | 2020-06-09 | 中国石油天然气集团有限公司 | Device for simulating drilling fluid to invade reservoir stratum to induce hydrate decomposition |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115112845A (en) * | 2022-08-23 | 2022-09-27 | 中石化胜利石油工程有限公司钻井工艺研究院 | System and method for detecting oil-based drilling fluid performance |
| CN115112845B (en) * | 2022-08-23 | 2022-11-25 | 中石化胜利石油工程有限公司钻井工艺研究院 | System and method for detecting oil-based drilling fluid performance |
| CN115717517A (en) * | 2022-11-30 | 2023-02-28 | 北京探矿工程研究所 | Evaluation device and experimental method for influence of simulated drilling on hydrate decomposition inhibition performance |
| CN115717517B (en) * | 2022-11-30 | 2024-01-23 | 北京探矿工程研究所 | Evaluation device and experimental method for influence of simulated drilling on hydrate inhibition and decomposition performance |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112211599B (en) | 2024-07-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101532936B (en) | Method and device for evaluating inhibiting ability of drilling fluid on formation and decomposition of hydrate | |
| WO2017080353A1 (en) | Device for testing characteristics of sand production during mining of natural gas hydrate | |
| CN111551671B (en) | System and method for natural gas hydrate decomposition methane leakage and cold spring ecological simulation | |
| CN113338874B (en) | CO (carbon monoxide) 2 Alternately injecting inhibitor to produce methane and store CO 2 Simulation device and method | |
| CN111272576A (en) | Novel true triaxial fracturing seepage test device and method | |
| CN111537549B (en) | Carbon dioxide flooding, storing and fracturing device with continuously-changed phase state and experimental method | |
| CN113533676A (en) | Laboratory simulation method for determining generation efficiency of natural gas hydrate in deep sea bottom | |
| CN110108850B (en) | Coal seam gas pressure testing system and method based on drilling sampling actual measurement | |
| CN110927358B (en) | Natural gas hydrate mineral deposit fracturing experimental device | |
| CN105004849B (en) | A kind of method of gas hydrate solid state fluidizing exploitation digging indoor experimental apparatus | |
| CN113008682A (en) | True triaxial hydraulic fracturing simulation test device and method for natural gas hydrate reservoir | |
| CN112211599B (en) | Device and method for simulating drilling fluid to invade reservoir to induce hydrate decomposition | |
| CN107703275B (en) | High-pressure experimental device and method for methane hydrate phase balance research | |
| CN112727444B (en) | Visual hole sealing material crack plugging performance testing device and method | |
| CN113740196A (en) | Device and method for measuring carbon sequestration amount of in-situ pyrolysis organic mineral layer | |
| CN110988310A (en) | Oil reservoir geological sealing body CO2Analysis device and method for influence of escape on environment | |
| CN210714627U (en) | Device for simulating drilling fluid to invade reservoir stratum to induce hydrate decomposition | |
| Sun et al. | Hole-bottom freezing technique based on phase change heat transfer for gas-hydrates sampling: Efficiency optimization of refrigeration change of phase | |
| CN221260722U (en) | Gas pressure simulation experiment system under influence of multicomponent gas | |
| CN207689470U (en) | A kind of methane hydrate balances each other the High-Voltage Experimentation device of research | |
| CN117740607A (en) | Gas pressure simulation experiment system under influence of multicomponent gas | |
| CN210347634U (en) | Coal seam gas pressure test system based on drilling sampling actual measurement | |
| CN108106970B (en) | Visual heat resisting and pressure resisting device, gas-liquid interface mass transfer dissolution measuring device and method | |
| CN114542021B (en) | Thermochemical method for strengthening CO 2 Replacement mining CH 4 Hydrate device and method | |
| CN212111398U (en) | Hypergravity hydrate research experiment system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |