CN110984977A - Experimental simulation device and method for exploiting hydrate reservoir in superposed horizontal well - Google Patents
Experimental simulation device and method for exploiting hydrate reservoir in superposed horizontal well Download PDFInfo
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- 238000002347 injection Methods 0.000 claims abstract description 64
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- 238000006243 chemical reaction Methods 0.000 claims description 52
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- 239000007788 liquid Substances 0.000 claims description 7
- 238000005065 mining Methods 0.000 claims description 7
- 238000002474 experimental method Methods 0.000 claims description 5
- 150000004677 hydrates Chemical class 0.000 claims description 5
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- 238000000354 decomposition reaction Methods 0.000 claims description 3
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
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- 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/30—Specific pattern of wells, e.g. optimising the spacing of wells
- E21B43/305—Specific pattern of wells, e.g. optimising the spacing of wells comprising at least one inclined or horizontal well
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/34—Arrangements for separating materials produced by the well
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Abstract
The invention discloses an experimental simulation device and method for exploiting a hydrate reservoir stratum by a superposed horizontal well, and the experimental simulation device comprises a water injection container, a water injection pump set, a gas cylinder, an air compressor, a booster pump, a gas high-pressure container, a plurality of horizontal outlet pipelines, a data acquisition instrument, a small-sized water bath, a constant-temperature water bath and a hydrate distribution simulation device arranged in the constant-temperature water bath, wherein the water injection container is communicated with the water injection pump set; the small water bath is communicated with the upper end and the lower end of the water filling container respectively; the booster pump is communicated with the gas high-pressure container; the hydrate distribution simulation device is internally provided with a plurality of horizontal well horizontal pipe sections, and the outer surface of the hydrate distribution simulation device is provided with a horizontal well mouth communicated with the horizontal well horizontal pipe sections; and the plurality of horizontal outlet pipelines are horizontally superposed on one side of the hydrate distribution simulation device and are communicated with the horizontal pipe section of the horizontal well. The invention utilizes the advantages of the stacked horizontal wells in the aspect of gravity differentiation to combine and utilize the existing exploitation method, separate exploitation from energy supplement and realize the separation of gas production and water production.
Description
Technical Field
The invention relates to an experimental simulation device and method for exploiting a hydrate reservoir by using a superposed horizontal well.
Background
As a potential clean energy source, methane hydrate has a wide distribution in frozen soil regions as well as in oceans. At present, the main methods for exploiting the methane hydrate comprise a depressurization method, a heat injection method, a chemical agent injection method and CO2/CH4Displacement and combined processes, but none of them is satisfactory for commercial exploitation of such hydrates. Thus, effective recovery of hydrates cannot be achieved from the point of view of the recovery method alone, but rather new recovery concepts are required. For an actual hydrate reservoir stratum, the method has the characteristics of dispersed reserves and poor fluidity. According to the characteristics of a hydrate reservoir, the main problems of the hydrate reservoir are as follows: on the one hand, mining technology can control sufficient reserves to ensure that the production meets the commercial value of mining; on the other hand, the production technology must change the flow capacity of the hydrate reservoir, that is, the hydrate reservoir needs to be supplemented with certain energy to promote the phase state of the hydrate to change, so that a certain pressure difference is formed, and fluid in pores of the reservoir flows. Meanwhile, the solid hydrate releases partial free water after being decomposed and participates in flowing together with water or fine sand in the pores, so that gas is easily bound in the pores by the water, and a hydrate reservoir is flooded, therefore, the mining technology has good water control capacity and sand control capacity, flooding of the reservoir is avoided as much as possible, and the production time of the gas is prolonged. From the above, it can be seen that the exploitation of hydrate reservoir not only needs to consider the current technical situation, but also must combine with geological features and cannot be carried out convenientlyConventional hydrocarbon reservoir mining techniques.
Disclosure of Invention
The invention mainly overcomes the defects in the prior art and provides an experimental simulation device and method for exploiting a hydrate reservoir by using a superposed horizontal well.
The technical scheme provided by the invention for solving the technical problems is as follows: a superposed horizontal well exploitation hydrate reservoir experiment simulation device comprises a water injection container, a water injection pump set, a gas cylinder, an air compressor, a booster pump, a gas high-pressure container, a plurality of horizontal outlet pipelines, a data acquisition instrument, a small water bath, a constant-temperature water bath and a hydrate distribution simulation device arranged in the constant-temperature water bath, wherein the water injection container is communicated with the water injection pump set; the upper end and the lower end of the small water bath are respectively communicated with the water injection container; the gas cylinder and the air compressor are both communicated with a booster pump, and the booster pump is communicated with a gas high-pressure container;
the hydrate distribution simulation device is internally provided with a plurality of horizontal well horizontal pipe sections, the outer surface of the hydrate distribution simulation device is provided with a horizontal well mouth communicated with the horizontal well horizontal pipe sections, and the side surface of the hydrate distribution simulation device is provided with a plurality of high-pressure gauges and thermometers; a plurality of horizontal outlet pipelines are horizontally superposed on one side of the hydrate distribution simulation device and are communicated with horizontal pipe sections of the horizontal well;
the horizontal outlet pipeline comprises a back pressure valve and a gas-liquid separation bottle which are sequentially communicated, a gas discharge pipeline is arranged on the gas-liquid separation bottle, and a wet flowmeter is arranged on the gas discharge pipeline;
the gas high-pressure container and the water injection pump set are both communicated with the bottom of the hydrate distribution simulation device and the horizontal well mouth;
the data acquisition instrument is respectively and electrically connected with the high-pressure gauge, the thermometer and the wet flowmeter.
The hydrate distribution simulation device comprises a reaction kettle, and a reaction kettle top cover and a reaction kettle base which are respectively arranged at the upper end and the lower end of the reaction kettle, wherein horizontal pipe sections of the horizontal well are superposed in the reaction kettle, the horizontal well mouth is arranged on the outer side of the reaction kettle, and the horizontal pipe sections of the horizontal well are provided with a plurality of horizontal section perforations.
The further technical scheme is that gaskets are arranged between the reaction kettle and the reaction kettle top cover and between the reaction kettle and the reaction kettle base.
The technical scheme is that the water injection pump group comprises a water injection pump I and a water injection pump II which are arranged in parallel.
The further technical scheme is that a pressure gauge is arranged between the gas high-pressure container and the hydrate distribution simulation device.
An experimental simulation method for exploiting a hydrate reservoir by using a superposed horizontal well comprises the following steps:
(1) after drying the porous medium, filling the porous medium in a hydrate distribution simulation device;
(2) starting an air compressor, pressurizing the gas in the gas cylinder, and storing the gas in a gas high-pressure container;
(3) pressurizing the hydrate distribution simulation device to a certain pressure value through a gas high-pressure container, and detecting the leakage of the device;
(4) if the error of the pressure of the gas within 24 hours is small within 24 hours, the tightness of the device is considered to be good, and the gas is discharged for pressure relief;
(5) adjusting the temperature of the constant-temperature water bath to a required temperature;
(6) starting a water injection pump I or a water injection pump II, injecting water into the hydrate distribution simulation device, discharging gas, and pressurizing to a certain pressure value;
(7) discharging a certain volume of water by using gas to vacate partial space for injected gas, and pressurizing the hydrate distribution simulation device to the required pressure;
(8) continuously pressurizing the hydrate distribution simulation device to the required pressure by using the water injection pump I or the water injection pump II to provide power for hydrate generation;
(9) closing an inlet and an outlet of the hydrate distribution simulation device, and gradually generating hydrates;
(10) recording the temperature and the pressure of the reaction kettle during the generation of the hydrate;
(11) starting a small water bath, and heating the water filled in the water container to the required temperature or steam;
(12) starting the water injection pump I or the water injection pump II, injecting hot water or steam to a certain pressure, keeping the system constant, and providing a certain time for the decomposition of the hydrate;
(13) setting the back pressure valves of the horizontal pipe section of the uppermost layer of the horizontal well and the horizontal pipe section of the lowermost layer of the horizontal well to a certain pressure, wherein the back pressure valve of the horizontal pipe section of the uppermost layer of the horizontal well is adjusted to a certain value below the phase equilibrium pressure to carry out pressure reduction mining, and the back pressure valve of the horizontal pipe section of the lowermost layer of the horizontal well is adjusted to be above or below the phase equilibrium pressure;
(14) and recording the data such as pressure, flow, temperature and the like through a data acquisition instrument.
The invention has the following beneficial effects:
(1) the advantages of the stacked horizontal wells in the aspect of gravity differentiation are utilized, the existing exploitation method is combined and utilized, exploitation and energy supplement are separated, and gas production and water production are separated;
(2) the water control can be realized by adopting the overlapped horizontal wells, the flooding of a gas production well is avoided, and meanwhile, the reasonable utilization of energy is facilitated;
(3) a new hydrate reservoir exploitation mode is provided, and well position design and an exploitation method are organically combined from the perspective of reservoir characteristics;
(4) an indoor experimental simulation model is designed, and a foundation is laid for verifying the rule of the mining process.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic structural diagram of a hydrate distribution simulation apparatus.
Detailed Description
The present invention will be further described with reference to the following examples and the accompanying drawings.
As shown in fig. 1, the experimental simulation device for exploiting hydrate reservoirs of stacked horizontal wells comprises a water injection container 1, a water injection pump set, a gas cylinder 7, an air compressor 12, a booster pump 10, a gas high-pressure container 17, five horizontal outlet pipelines, a data acquisition instrument 39, a small water bath 44, a constant temperature water bath 20 and a hydrate distribution simulation device 27 arranged in the constant temperature water bath 21;
the small water bath 44 is respectively communicated with the upper end and the lower end of the water injection container 1 through a small water bath heating outlet gate valve 42, a hot water circulating outlet gate valve 40, a small water bath heating inlet gate valve 43 and a hot water circulating inlet gate valve 41;
the water injection pump set comprises a water injection pump I3 and a water injection pump II 5 which are arranged in parallel, and outlet ends of the water injection pump I3 and the water injection pump II 5 are respectively provided with an outlet gate valve 4I and an outlet gate valve II 6;
the gas cylinder 7, the gas cylinder outlet control valve 8, the booster pump inlet valve 9 and the booster pump 10 are communicated, the air compressor 12, the air compressor outlet valve 11 and the booster pump 10 are also communicated, and the booster pump 10, the booster pump outlet valve 13, the gas high-pressure container inlet valve 14 and the gas high-pressure container 17 are communicated in sequence;
the gas high-pressure container 17, the pressure gauge 15, the gas high-pressure container outlet valve 16 and the gas control gate valve 18 are communicated in sequence; the inlet valve 19 of the simulation device is respectively communicated with the gas control gate valve 18 and the outlet gate valve II 6;
the simulation device inlet valve 19, the reaction kettle inlet gate valve 20 and the bottom of the hydrate distribution simulation device 27 are communicated, the simulation device inlet valve 19 is also communicated with horizontal well energy injection control valves 45-49 respectively, and the horizontal well energy injection control valves 45-49 are communicated with horizontal well outlets 26 of horizontal pipe sections 54-50 of a horizontal well respectively;
the hydrate distribution simulation device 27 is internally provided with horizontal well horizontal pipe sections 50-54, the outer surface of the hydrate distribution simulation device is provided with a horizontal well mouth 26 communicated with the horizontal well horizontal pipe sections, and the side surface of the hydrate distribution simulation device is provided with five high-pressure gauges 22 and five thermometers 23; five horizontal outlet pipelines are horizontally superposed on one side of the hydrate distribution simulation device 27 and are communicated with horizontal well pipe sections 50-54; one end of the high-pressure gauge 22 is positioned at a flat well pressure measuring point 25 in the hydrate distribution simulation device 27; the five high-pressure gauges 22 and the five thermometers 23 are converged at a data recording convergence point 38; the top of the hydrate distribution simulation device 27 is communicated with a reaction kettle outlet gate valve 29, and the reaction kettle outlet gate valve 29 is converged at an outlet pipeline of each horizontal outlet pipeline and a horizontal well outlet junction 30;
the horizontal outlet pipeline comprises a horizontal well outlet control valve 28, a back pressure valve 31, a control gate valve 32 and a gas-liquid separation bottle 33 which are sequentially communicated, a gas discharge pipeline 37 is arranged on the gas-liquid separation bottle 33, and a control gate valve 34, a wet flowmeter 35 and a control valve 36 are arranged on the gas discharge pipeline 37;
the data acquisition instrument 39 is electrically connected with the high-pressure gauge 22, the thermometer 23 and the wet flowmeter 35 respectively.
As shown in fig. 2, the hydrate distribution simulation apparatus 27 includes a reaction kettle 110, and a reaction kettle top cover 120 and a reaction kettle base 130 respectively installed at the upper end and the lower end of the reaction kettle 110, wherein the horizontal pipe section of the horizontal well is stacked in the reaction kettle 110, the horizontal well mouth 26 is installed at the outer side of the reaction kettle 110, and the horizontal pipe section of the horizontal well is provided with a plurality of horizontal section perforations 140; gaskets 150 are arranged between the reaction kettle 110 and the reaction kettle top cover 120 and between the reaction kettle base 130.
The hydrate distribution simulation device 27 has the following advantages:
(1) the reaction kettle adopts a cylindrical barrel design, the top end and the low end of the reaction kettle realize high-pressure sealing by adopting a threaded connection plus a gasket, and meanwhile, the switch at the two ends can be realized by adopting threaded connection and rotation, so that the operation is convenient;
(2) the measuring position of the temperature probe is positioned at the axial center of the reaction kettle, and the probes are uniformly distributed on the barrel body of the reaction kettle;
(3) the horizontal well is simulated by a horizontal pipe section, round small holes are uniformly distributed in the vertical direction of the pipe section to provide an inlet and an outlet for fluid, and meanwhile, a certain mesh of screen mesh is filled in the pipe section to prevent a simulation medium from blocking the round small holes; the right end of the horizontal pipe section is a pressure sensor interface which is connected by threads, and a fixing bolt is arranged on the wall surface of the reaction kettle and used for fixing the horizontal pipe section and testing the pressure change condition of the horizontal pipe section in the process of simulating the exploitation of the hydrate;
(4) in the process of simulating the exploitation of the hydrate, the horizontal pipe section can be used as a production port of a horizontal well and also can be used as an injection end of energy to provide energy for a hydrate simulation reservoir (such as quartz sand, glass beads and the like);
(5) gas injection and water injection ports are arranged at two ends of the reaction kettle, are mainly used for gas supply and water supply in the hydrate generation process and can also be used as a gas extraction port and an energy injection port for researching the hydrate exploitation process;
(6) in order to fully embody the gravity differentiation function and exert the function of the horizontal section, the design process of the reaction kettle must pay attention to the height and radial proportion of the reaction kettle;
(7) the device can simulate the relevant functions of the overlapped horizontal well, and researches the exploitation rule of the hydrate reservoir by selecting different injection heat positions or different extraction positions.
The experimental steps of the device are as follows:
hydrate generation:
1. after drying the porous medium, filling the porous medium into a reaction kettle 110;
2. closing a water injection outlet gate valve 6, opening an outlet 16 of a gas high-pressure container and a gas control gate valve 18, opening a gas cylinder outlet control valve 8, an inlet valve 9 of a booster pump and an outlet valve 13 of the booster pump, opening an air compressor 12, opening an outlet 11 of the air compressor, boosting the gas in a gas cylinder 7, and storing the gas in a gas high-pressure container 17;
3. pressurizing the reaction kettle 110 to a certain pressure value through a gas high-pressure container 17, and performing leak detection on the device;
4. opening an inlet gate valve 20 of the reaction kettle, closing energy injection control valves 45-49 of the horizontal well and all outlet gate valves, and if the error of the gas pressure within 24 hours is small within 24 hours, considering that the tightness of the device is good, and discharging and decompressing the gas;
5. adjusting the temperature of the constant-temperature water bath 21 to a required temperature, opening an outlet gate valve 29 of the reaction kettle, and keeping the rest outlet gate valves in a closed state;
6. opening a water inlet gate valve 2, opening a water injection pump I3 or a water injection pump II 5, injecting water into the reaction kettle 110, discharging gas, and pressurizing to a certain pressure value;
7. closing the outlet gate valve 6 of the waterway, opening the gas control gate valve 18, opening the outlet gate valve 29 of the reaction kettle, discharging a certain volume of water by gas to vacate partial space for the injected gas, and pressurizing the reaction kettle 110 to the required pressure;
8. continuously pressurizing the reaction kettle 110 to the required pressure by using a water injection pump I3 or a water injection pump II 5 to provide power for generating the hydrate;
9. closing the inlet gate valve 20 and the outlet gate valve 29 of the reaction kettle, and gradually generating hydrates;
10. the temperature and pressure of the reactor were recorded during hydrate formation.
Experimental procedure for stacking horizontal wells:
in fig. 2, the reaction kettle has five horizontal sections, each horizontal section is connected with a water injection inlet gate valve 45, so that each horizontal section can be used for supplying heat, and simultaneously, each horizontal section is respectively connected with a separate back pressure valve 31, a gas-liquid separation bottle (with a balance) 33 and a wet flowmeter 35 for metering gas production and water production conditions of different horizontal sections. For energy supplement, the injected water can be heated to a certain required temperature (even to steam) by a small water bath 44 and injected into different levels by a water injection pump i 3 or a water injection pump ii 5. In addition, CO can be carried out by replacing the gas cylinder 7 with carbon dioxide and injecting it into the horizontal section through a gas injection system2/CH4And (4) performing replacement reaction. The heat injection steps using the stacked horizontal wells are as follows:
11. starting the small water bath 44 to heat the water injected into the water container 1 to a desired temperature or steam;
12. starting a water injection pump I3 or a water injection pump II 5, opening a horizontal section control valve 47, injecting hot water or steam to a certain pressure, stopping the pump, closing the control valve 47, keeping the system constant, and providing a certain time for the decomposition of the hydrate;
13. setting the back pressure valves of the horizontal well horizontal pipe section 50 and the horizontal well horizontal pipe section 54 to a certain pressure, wherein the back pressure valve of the horizontal well horizontal pipe section 50 should be adjusted to a certain value below the phase equilibrium pressure to carry out depressurization production, and the back pressure valve of the horizontal well horizontal pipe section 54 can be adjusted to be above or below the phase equilibrium pressure;
14. the data of pressure, flow rate, temperature, etc. are recorded by the data collector 39.
Although the present invention has been described with reference to the above embodiments, it should be understood that the present invention is not limited to the above embodiments, and those skilled in the art can make various changes and modifications without departing from the scope of the present invention.
Claims (6)
1. The experimental simulation device for exploiting the hydrate reservoir stratum by the aid of the superposed horizontal wells is characterized by comprising a water injection container (1), a water injection pump set, a gas cylinder (7), an air compressor (12), a booster pump (10), a gas high-pressure container (17), a plurality of horizontal outlet pipelines, a data acquisition instrument (39), a small water bath (44), a constant-temperature water bath (20) and a hydrate distribution simulation device (27) arranged in the constant-temperature water bath (21), wherein the water injection container (1) is communicated with the water injection pump set; the small water bath (44) is respectively communicated with the upper end and the lower end of the water injection container (1); the gas cylinder (7) and the air compressor (12) are both communicated with a booster pump (10), and the booster pump (10) is communicated with a gas high-pressure container (17);
a plurality of horizontal well horizontal pipe sections are arranged in the hydrate distribution simulation device (27), a horizontal well mouth (26) communicated with the horizontal well horizontal pipe sections is arranged on the outer surface of the hydrate distribution simulation device, and a plurality of high-pressure gauges (22) and thermometers (23) are arranged on the side surface of the hydrate distribution simulation device; a plurality of horizontal outlet pipelines are horizontally superposed on one side of the hydrate distribution simulation device (27) and are communicated with a horizontal pipe section of a horizontal well;
the horizontal outlet pipeline comprises a back pressure valve (31) and a gas-liquid separation bottle (33) which are sequentially communicated, a gas discharge pipeline (37) is arranged on the gas-liquid separation bottle (33), and a wet flowmeter (35) is arranged on the gas discharge pipeline (37);
the gas high-pressure container (17) and the water injection pump set are both communicated with the bottom of the hydrate distribution simulation device (27) and the horizontal well head (26);
the data acquisition instrument (39) is electrically connected with the high-pressure gauge (22), the thermometer (23) and the wet flowmeter (35) respectively.
2. The stacked horizontal well exploitation hydrate reservoir experiment simulation device according to claim 1, wherein the hydrate distribution simulation device (27) comprises a reaction kettle (110), and a reaction kettle top cover (120) and a reaction kettle base (130) which are respectively installed at the upper end and the lower end of the reaction kettle (110), the horizontal pipe section of the horizontal well is stacked in the reaction kettle (110), the horizontal well mouth (26) is installed at the outer side of the reaction kettle (110), and the horizontal pipe section of the horizontal well is provided with a plurality of horizontal section perforations (140).
3. The stacked horizontal well exploitation hydrate reservoir experiment simulation device according to claim 2, wherein gaskets (150) are arranged between the reaction kettle (110) and the reaction kettle top cover (120) and the reaction kettle base (130).
4. The experimental simulation device for the hydrate reservoir exploitation of the stacked horizontal wells according to claim 1, wherein the water injection pump set comprises a water injection pump I (3) and a water injection pump II (5) which are arranged in parallel.
5. The stacked horizontal well exploitation hydrate reservoir experiment simulation device according to claim 1, wherein a pressure gauge (15) is arranged between the high-pressure gas container (17) and the hydrate distribution simulation device (27).
6. An experimental simulation method for exploiting a hydrate reservoir by using a superposed horizontal well is characterized by comprising the following steps of:
(1) after the porous medium is dried, filling the porous medium in a hydrate distribution simulation device (27);
(2) starting an air compressor (12), pressurizing the gas in the gas cylinder (7), and storing the gas in a gas high-pressure container (17);
(3) pressurizing the hydrate distribution simulation device (27) to a certain pressure value through a gas high-pressure container (17), and detecting the leakage of the device;
(4) if the error of the pressure of the gas within 24 hours is small within 24 hours, the tightness of the device is considered to be good, and the gas is discharged for pressure relief;
(5) adjusting the temperature of the thermostatic water bath (21) to a required temperature;
(6) starting a water injection pump I (3) or a water injection pump II (5), injecting water into the hydrate distribution simulation device (27), discharging gas, and pressurizing to a certain pressure value;
(7) discharging a certain volume of water by using gas to vacate partial space for injected gas, and pressurizing the hydrate distribution simulation device (27) to the required pressure;
(8) continuously pressurizing the hydrate distribution simulation device (27) to the required pressure by using the water injection pump I (3) or the water injection pump II (5) to provide power for hydrate generation;
(9) closing an inlet and an outlet of a hydrate distribution simulation device (27) and gradually generating hydrates;
(10) recording the temperature and the pressure of the reaction kettle during the generation of the hydrate;
(11) starting a small water bath (44), and heating the water in the water filling container (1) to the required temperature or steam;
(12) starting a water injection pump I (3) or a water injection pump II (5), injecting hot water or steam to a certain pressure, keeping the system constant, and providing a certain time for the decomposition of the hydrate;
(13) setting the back pressure valves of the horizontal pipe section of the uppermost layer of the horizontal well and the horizontal pipe section of the lowermost layer of the horizontal well to a certain pressure, wherein the back pressure valve of the horizontal pipe section of the uppermost layer of the horizontal well is adjusted to a certain value below the phase equilibrium pressure to carry out pressure reduction mining, and the back pressure valve of the horizontal pipe section of the lowermost layer of the horizontal well is adjusted to be above or below the phase equilibrium pressure;
(14) the data of pressure, flow, temperature and the like are recorded by a data acquisition instrument (39).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311000809.XA CN116856923A (en) | 2019-12-24 | 2019-12-24 | Experimental simulation device and method for hydrate exploitation reservoir of stacked horizontal well |
| CN201911341579.7A CN110984977A (en) | 2019-12-24 | 2019-12-24 | Experimental simulation device and method for exploiting hydrate reservoir in superposed horizontal well |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911341579.7A CN110984977A (en) | 2019-12-24 | 2019-12-24 | Experimental simulation device and method for exploiting hydrate reservoir in superposed horizontal well |
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| CN202311000809.XA Division CN116856923A (en) | 2019-12-24 | 2019-12-24 | Experimental simulation device and method for hydrate exploitation reservoir of stacked horizontal well |
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| CN110984977A true CN110984977A (en) | 2020-04-10 |
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Cited By (6)
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| CN111691856A (en) * | 2020-05-22 | 2020-09-22 | 中海石油(中国)有限公司湛江分公司 | Device and method for simulating influence of overlying and marginal low water layers on methane hydrate exploitation |
| CN111706308A (en) * | 2020-05-22 | 2020-09-25 | 中海石油(中国)有限公司湛江分公司 | Gas flow monitoring simulation device and method in porous medium containing methane hydrate |
| CN111794722A (en) * | 2020-08-14 | 2020-10-20 | 西南石油大学 | Marine natural gas hydrate accumulation-development simulation experiment system and method |
| CN112780239A (en) * | 2020-12-30 | 2021-05-11 | 西南石油大学 | Water pressurization and rush drainage device for water-drive gas reservoir flooding well |
| CN113092732A (en) * | 2021-05-07 | 2021-07-09 | 青岛理工大学 | Natural gas hydrate exploitation simulation and sand production and prevention experimental method |
| CN115929261A (en) * | 2023-01-30 | 2023-04-07 | 中国矿业大学 | Marine natural gas hydrate multi-row horizontal well layered mining device and method |
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| CN116856923A (en) | 2023-10-10 |
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