CN110907336A - Experimental simulation device and method for determining distribution of hydrate in porous medium - Google Patents
Experimental simulation device and method for determining distribution of hydrate in porous medium Download PDFInfo
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- CN110907336A CN110907336A CN201911341575.9A CN201911341575A CN110907336A CN 110907336 A CN110907336 A CN 110907336A CN 201911341575 A CN201911341575 A CN 201911341575A CN 110907336 A CN110907336 A CN 110907336A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
Abstract
The invention discloses an experimental simulation device and method for determining distribution of hydrates in a porous medium, 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 back pressure valve, a container, a wet gas flowmeter, a data acquisition instrument, 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 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 gas high-pressure container and the water injection pump set are both communicated with the inlet of the hydrate distribution simulation device; the outlet of the hydrate distribution simulation device, the back pressure valve and the container are communicated in sequence. The invention uses the resistance change characteristics of different positions to represent the change of the hydrate content, thereby realizing the monitoring of the hydrate distribution; the spatial judgment of the hydrate distribution is realized through the spatial distribution of the electrodes, the position of each electrode is recycled, and the electrodes can be replaced according to the requirement of the measurement position.
Description
Technical Field
The invention relates to an experimental simulation device and method for determining distribution of a hydrate in a porous medium.
Background
Hydrate is a crystalline substance, and particularly methane hydrate has been widely noticed as a potential clean energy source at present. The presence of hydrates can alter the fundamental properties of the reservoir (e.g., permeability, thermal conductivity, etc.), and thus different hydrate distributions have different fundamental properties. In the development of an actual hydrate reservoir, the hydrate reservoir is mainly obtained by means of well logging, earthquake, artificial source electromagnetic method and the like, but for laboratory conditions, people often use artificial porous media containing hydrate to carry out relevant experimental research, and assume that the hydrate is in a uniformly distributed state in the porous media, but the distribution of the hydrate in the porous media is not uniform actually, so that the deviation of the result obtained by the experiment is large, and the guiding significance to the reality is reduced, therefore, the hydrate distribution condition of the hydrate in a laboratory should be researched as an important 'precondition' to ensure that people can evaluate the influence of the heterogeneity of the hydrate distribution on the experimental result, but the common CT in the laboratory is expensive in manufacturing cost and small in scale range and is difficult to adapt to the requirement of hydrate distribution judgment in experimental samples under different scales, therefore, there is a need for a device and a corresponding determination method that satisfies this requirement.
Disclosure of Invention
The invention mainly overcomes the defects in the prior art and provides an experimental simulation device and method for determining the distribution of hydrates in a porous medium.
The technical scheme provided by the invention for solving the technical problems is as follows: an experimental simulation device for determining the distribution of hydrates in a porous medium 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 back pressure valve, a container, a wet gas flowmeter, a data acquisition instrument, 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 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 gas high-pressure container and the water injection pump set are both communicated with an inlet of the hydrate distribution simulation device; the outlet of the hydrate distribution simulation device, the back pressure valve and the container are communicated in sequence;
the hydrate distribution simulation device is respectively provided with a pressure sensor I, a pressure sensor II, a resistance electrode probe and a temperature probe; a gas distribution pipeline is arranged on the container, and the wet gas flowmeter is arranged on the gas distribution pipeline;
the data acquisition instrument is respectively and electrically connected with the pressure sensor I, the pressure sensor II, the resistance electrode probe, the temperature probe, the back pressure valve and the wet gas flowmeter.
A further technical scheme is, hydrate distribution analogue means includes reation kettle and connects respectively the entry ring flange at reation kettle both ends, window flange group is including window ring flange I, window glass, window ring flange II, window ring flange I, window ring flange II press from both sides tight window glass and pass through bolted connection and are in reation kettle's one end.
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 determining the distribution of hydrates in a porous medium, comprising the steps of:
(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) opening a back pressure valve, if the error of the pressure of the gas within 24 hours is small within 24 hours, regarding the tightness of the device as good, and discharging the gas for pressure relief;
(5) adjusting the temperature of the constant-temperature water bath to the required temperature, and closing an outlet of the hydrate distribution simulation device (21);
(6) starting a water injection pump set, injecting water into the hydrate distribution simulation device, discharging gas, and pressurizing to a certain pressure value;
(7) opening an outlet of the hydrate distribution simulation device, discharging a certain volume of water by using gas to vacate partial space for injected gas, and pressurizing the hydrate distribution simulation device to a required pressure;
(8) continuously pressurizing the hydrate distribution simulation device to the required pressure by using the water injection pump group to provide power for hydrate generation;
(9) closing the inlet and the outlet of the hydrate distribution simulation device, and gradually generating the hydrate;
(10) during hydrate formation, the resistance is measured and the temperature is recorded.
The invention has the following beneficial effects:
(1) the change of the hydrate content is represented by using the resistance change characteristics of different positions, so that the hydrate distribution is monitored;
(2) the spatial judgment of the hydrate distribution is realized by the spatial distribution of the electrodes, the position of each electrode is recycled, and the electrodes can be replaced according to the requirement of the measurement position;
(3) the device also realizes the simulation of research contents such as depressurization mining, heat injection mining, well pattern adjustment and the like, and can be used for researching and knowing the mining rule of the hydrate on the basis of satisfying the hydrate distribution.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of a hydrate distribution simulation apparatus;
fig. 3 is a right side view of the 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 determining the distribution of hydrates in porous media of the present invention 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, a back pressure valve 27, a container 29, a wet gas flowmeter 30, a data collector 32, a thermostatic water bath 20, and a hydrate distribution simulation device 21 disposed in the thermostatic water bath 20;
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 two ends of the hydrate distribution simulation device 21 are respectively provided with a simulation device inlet valve 19 and a simulation device outlet valve 26, and 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 sequentially communicated; 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 simulator outlet valve 26, the back pressure valve 27, the inlet control valve 28 and the container 29 are communicated in sequence;
the hydrate distribution simulation device 21 is respectively provided with a pressure sensor I24, a pressure sensor II 25, a resistance electrode probe 22 and a temperature probe 23; a gas exhaust line 31 is further arranged on the container 29, and a wet gas flowmeter 30 is arranged on the gas exhaust line 31; a balance is arranged at the bottom of the container 29;
the data acquisition instrument 32 is respectively and electrically connected with the pressure sensor I24, the pressure sensor II 25, the resistance electrode probe 22, the temperature probe 23, the back pressure valve 27 and the wet gas flowmeter 30.
As shown in fig. 2 and 3, hydrate distribution simulation device 21 includes reation kettle 211 and connects respectively entry ring flange 212, the window flange group at reation kettle 211 both ends, window flange group is including window ring flange I213, window glass 214, window ring flange II 215, window ring flange I213, window ring flange II 215 press from both sides tight window glass 214 and pass through bolted connection at reation kettle 211's one end.
Wherein, a window flange gasket 216 is arranged between the window flange plate I213 and the reaction kettle 211, and an inlet flange gasket 217 is arranged between the inlet flange plate 212 and the reaction kettle 211.
The experimental steps of the device are as follows:
1. after drying the porous medium, filling the porous medium in a hydrate distribution simulation device 21;
2. closing an outlet gate valve II 6, opening an outlet valve 16 of the gas high-pressure container and a gas control gate valve 18, opening an outlet control valve 8 of the gas cylinder, an inlet valve 9 of a booster pump 10 and an outlet valve 13 of the booster pump, opening an air compressor 12, opening an outlet valve 11 of the air compressor, boosting the gas in the gas cylinder 7, and storing the gas in the gas high-pressure container 17;
3. pressurizing the hydrate distribution simulation device 21 to a certain pressure value through a gas high-pressure container 17, and detecting the leakage of the device;
4. opening an outlet valve 26, a back pressure valve 27 and an inlet control valve 28 of the simulation device, 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 and decompressed;
5. adjusting the temperature of the thermostatic water bath 20 to the required temperature, and closing the outlet valve 26 of the simulator;
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 hydrate distribution simulation device 21, discharging gas, and pressurizing to a certain pressure value;
7. closing an outlet gate valve II 6 of the waterway, opening a gas control gate valve 18, opening an outlet valve 26 of the simulation device, discharging a certain volume of water by gas to vacate partial space for the injected gas, and pressurizing the hydrate distribution simulation device 21 to the required pressure;
8. continuously pressurizing the hydrate distribution simulation device 21 to the required pressure by using the water injection pump I3 and the water injection pump II 5 to provide power for hydrate generation;
9. closing the simulation device inlet valve 19 and the simulation device outlet valve 26, and gradually generating hydrates;
10. during hydrate formation, the resistance is measured and the temperature is recorded.
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 (5)
1. An experimental simulation device for determining the distribution of hydrates in a porous medium 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 back pressure valve (27), a container (29), a wet gas flowmeter (30), a data acquisition instrument (32), a constant temperature water bath (20) and a hydrate distribution simulation device (21) arranged in the constant temperature water bath (20), wherein the water injection container (1) is communicated with the water injection pump set; 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); the gas high-pressure container (17) and the water injection pump set are both communicated with an inlet of the hydrate distribution simulation device (21); the outlet of the hydrate distribution simulation device (21), the back pressure valve (27) and the container (29) are communicated in sequence;
the hydrate distribution simulation device (21) is respectively provided with a pressure sensor I (24), a pressure sensor II (25), a resistance electrode probe (22) and a temperature probe (23); a gas outward distribution pipeline (31) is arranged on the container (29), and the wet gas flowmeter (30) is installed on the gas outward distribution pipeline (31);
the data acquisition instrument (32) is respectively electrically connected with the pressure sensor I (24), the pressure sensor II (25), the resistance electrode probe (22), the temperature probe (23), the back pressure valve (27) and the wet gas flowmeter (30).
2. The experimental simulation device for determining the distribution of the hydrate in the porous medium according to claim 1, wherein the hydrate distribution simulation device (21) comprises a reaction kettle (211), and an inlet flange (212) and a window flange set which are respectively connected to two ends of the reaction kettle (211), wherein the window flange set comprises a window flange I (213), a window glass (214) and a window flange II (215), and the window flange I (213) and the window flange II (215) clamp the window glass (214) and are connected to one end of the reaction kettle (211) through bolts.
3. The experimental simulation device for determining the distribution of the hydrate in the porous medium according to claim 1, wherein the water injection pump group comprises a water injection pump I (3) and a water injection pump II (5) which are arranged in parallel.
4. An experimental simulation device for determining the distribution of hydrates in a porous medium according to claim 1, characterized in that a pressure gauge (15) is arranged between the high-pressure gas container (17) and the hydrate distribution simulation device (21).
5. An experimental simulation method for determining the distribution of hydrates in a porous medium, comprising the steps of:
(1) after drying the porous medium, filling the porous medium in a hydrate distribution simulation device (21);
(2) starting an air compressor (12), pressurizing the gas in the gas bottle (7), and storing the gas in a gas high-pressure container (17);
(3) pressurizing the hydrate distribution simulation device (21) to a certain pressure value through a gas high-pressure container (17), and detecting the leakage of the device;
(4) opening a back pressure valve (27), 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 (29) to a required temperature, and closing an outlet of the hydrate distribution simulation device (21);
(6) starting a water injection pump set, injecting water into the hydrate distribution simulation device (21), discharging gas, and pressurizing to a certain pressure value;
(7) opening an outlet of the hydrate distribution simulation device (21), discharging a certain volume of water by using gas to vacate partial space for injected gas, and pressurizing the hydrate distribution simulation device (21) to a required pressure;
(8) continuing to pressurize the hydrate distribution simulation device (21) to a required pressure by using the water injection pump group to provide power for hydrate generation;
(9) closing the inlet and the outlet of the hydrate distribution simulation device (21) and gradually generating hydrates;
(10) during hydrate formation, the resistance is measured and the temperature is recorded.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310386160.3A CN116990205A (en) | 2019-12-24 | 2019-12-24 | Experimental simulation device and method for determining distribution of hydrate in porous medium |
| CN201911341575.9A CN110907336A (en) | 2019-12-24 | 2019-12-24 | Experimental simulation device and method for determining distribution of hydrate in porous medium |
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| CN201911341575.9A CN110907336A (en) | 2019-12-24 | 2019-12-24 | Experimental simulation device and method for determining distribution of hydrate in porous medium |
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| CN202310386160.3A Division CN116990205A (en) | 2019-12-24 | 2019-12-24 | Experimental simulation device and method for determining distribution of hydrate in porous medium |
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| CN201911341575.9A Pending CN110907336A (en) | 2019-12-24 | 2019-12-24 | Experimental simulation device and method for determining distribution of hydrate in porous medium |
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| CN101612539A (en) * | 2009-07-16 | 2009-12-30 | 上海理工大学 | A kind of low temperature high pressure gas hydrate replacement reaction kettle and system |
| 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 |
| CN109557253A (en) * | 2018-11-02 | 2019-04-02 | 广州海洋地质调查局 | A kind of comprehensive hydrate simulation system and its experimental method |
| CN109611059A (en) * | 2018-11-02 | 2019-04-12 | 广州海洋地质调查局 | A kind of hydrate environment simulator |
| CN110075756A (en) * | 2019-05-30 | 2019-08-02 | 青岛科技大学 | A kind of cagem type gas hydrates continuous reaction apparatus |
| CN209215179U (en) * | 2018-09-21 | 2019-08-06 | 青岛海洋地质研究所 | The hydrate permeability measuring apparatus of joint X-CT technology |
| CN209398398U (en) * | 2018-11-02 | 2019-09-17 | 广州海洋地质调查局 | Three-dimensional comprehensive reservoir hydrate sunykatuib analysis system |
| CN209446419U (en) * | 2018-12-25 | 2019-09-27 | 国家地质实验测试中心 | Gas hydrates reservoir original position property parameter simulation test macro |
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2019
- 2019-12-24 CN CN202310386160.3A patent/CN116990205A/en active Pending
- 2019-12-24 CN CN201911341575.9A patent/CN110907336A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101612539A (en) * | 2009-07-16 | 2009-12-30 | 上海理工大学 | A kind of low temperature high pressure gas hydrate replacement reaction kettle and system |
| 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 |
| CN209215179U (en) * | 2018-09-21 | 2019-08-06 | 青岛海洋地质研究所 | The hydrate permeability measuring apparatus of joint X-CT technology |
| CN109557253A (en) * | 2018-11-02 | 2019-04-02 | 广州海洋地质调查局 | A kind of comprehensive hydrate simulation system and its experimental method |
| CN109611059A (en) * | 2018-11-02 | 2019-04-12 | 广州海洋地质调查局 | A kind of hydrate environment simulator |
| CN209398398U (en) * | 2018-11-02 | 2019-09-17 | 广州海洋地质调查局 | Three-dimensional comprehensive reservoir hydrate sunykatuib analysis system |
| CN209446419U (en) * | 2018-12-25 | 2019-09-27 | 国家地质实验测试中心 | Gas hydrates reservoir original position property parameter simulation test macro |
| CN110075756A (en) * | 2019-05-30 | 2019-08-02 | 青岛科技大学 | A kind of cagem type gas hydrates continuous reaction apparatus |
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