CN119801640A - A rock formation simulation test device for alternating injection and production of a depleted gas reservoir gas storage - Google Patents
A rock formation simulation test device for alternating injection and production of a depleted gas reservoir gas storage Download PDFInfo
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Abstract
The invention relates to the technical field of gas reservoirs, in particular to a rock stratum simulation test device for alternative injection and production of exhausted gas reservoirs, which comprises a fixed test frame, wherein a sample storage frame is rotatably connected in the middle of the fixed test frame, and the rock stratum simulation test device further comprises: the storage sleeves are uniformly arranged in the middle of the sample storage rack in a circumferential mode. According to the invention, through adopting the unit test barrel with the modularized design, a plurality of core samples can be tested at the same time, the test efficiency is greatly improved, the continuous test function is realized, the test period is effectively shortened, the waiting time can be obviously reduced when the long-term injection and production process is required to be simulated, and more test data can be obtained in the same time period.
Description
Technical Field
The invention relates to the technical field of gas reservoirs, in particular to a rock stratum simulation test device for alternative injection and production of exhausted gas reservoirs.
Background
With the development of global economy and the adjustment of energy structures, natural gas is used as a clean and efficient energy source, the demand of the natural gas is continuously increased, in order to meet the increasing natural gas demand and cope with the situation of seasonal or sudden unbalance of supply and demand, an underground gas storage is an important natural gas storage facility, depleted gas storage is regarded as an ideal underground gas storage type due to the natural geological structure and good sealing performance, and in the process of using depleted gas storage as the gas storage, alternating injection and production is one of common operation modes, however, the physical and mechanical characteristics of the gas storage layer are changed in the alternating injection and production process, namely, the situation of frequently injecting and producing the natural gas, which directly influences the long-term stability and safety of the gas storage.
The alternating injection and production research of the depleted gas reservoir requires a special rock stratum simulation test device to perform experiments to test and evaluate physical and mechanical properties of the reservoir in the process of repeatedly injecting and extracting natural gas so as to ensure the safety and reliability of the gas reservoir, but when the simulation test is performed at present, the interval time between the injection and the extraction of the natural gas in the actual gas reservoir is long, because the gas reservoir is mainly used for balancing seasonal supply and demand differences of the natural gas, a round of complete gas injection and production cycle of the gas reservoir is long and often reaches months or even one year, thus the test cycle is long, the conventional test equipment is generally of a preset fixed connection structure, only one rock core test position is arranged, but in order to ensure the representativeness and reliability of data, a large number of samples are usually required to perform the test, so that the test is very time-consuming, and a plurality of test equipment are required to perform the test simultaneously so that the required sample quantity can be obtained in unit test time.
Disclosure of Invention
In view of the above, the invention aims to provide a rock stratum simulation test device for alternating injection and production of exhausted gas reservoirs and gas reservoirs, which aims to solve the problems that when alternating injection and production simulation test is carried out on core samples at present, the pipeline of equipment is fixed, only one core sample can be tested at the same time, and when data of a plurality of samples need to be acquired, the test needs to be carried out one by one, so that the test period is overlong.
Based on the above purpose, the invention provides a rock stratum simulation test device for alternating injection and production of an exhausted gas reservoir gas storage, which comprises a fixed test frame, a storage sleeve, a unit test cylinder, a core test bin, a plurality of storage sleeves, a plurality of core test chambers and a test control unit, wherein the fixed test frame is rotationally connected with the sample storage frame; the device comprises a fixed test frame, a central conveying pipe, a conveying check valve, a conical communication port, a conical valve core, a sealing spring, a lifting guide frame, a unit injection and production frame and a pressurizing conveying pump, wherein the central conveying pipe is arranged in the middle of the filling port, the outer end of the central conveying pipe is connected with the injection and production port, the conveying check valve is arranged in the middle of the injection and production port, the conical communication port is arranged in the middle of the conveying check valve, the conical valve core is arranged in the middle of the conical communication port in a jogged sliding mode, the sealing spring is connected in the middle of the conical valve core, the lifting guide frame is symmetrically and vertically connected with the unit injection and production frame in a sliding mode on the upper side and the lower side of the lifting guide frame, the unit injection and production frame is connected with the injection and production conveying pipe in the middle, the injection and production port is mutually matched with the injection and production port, the switch top pressing rod is connected in the middle of the injection and production port, and the pressurizing conveying pump is connected to the other end of the injection and production conveying pipe.
The inner side surface of the filling port is provided with a closed thread in a surrounding manner, the outer side surface of the port sealing cover is provided with a connecting thread in a surrounding manner, and the port sealing cover is detachably connected with the filling port through the connecting thread and the closed thread.
The device is characterized in that a spiral guide groove is formed in the middle of the side wall of the storage sleeve, a spiral guide block is arranged in the middle of the outer wall of the unit testing cylinder, the spiral guide groove and the spiral guide block are mutually matched, a locking clamping groove is formed in the middle of the spiral guide block, an elastic locking block is arranged in the middle of the spiral guide groove in a horizontal sliding mode, the elastic locking block and the locking clamping groove are mutually matched, and an unlocking deflector rod is arranged at the outer end of the elastic locking block in a connecting mode.
The middle of the unit testing cylinder is provided with a storage chip, the top of the outer wall of the unit testing cylinder is provided with a storage contact, the top of the inner wall of the storage sleeve is provided with a read-write contact, and the storage contact and the read-write contact are mutually matched.
The utility model discloses a core testing device, including unit testing section of thick bamboo, the lateral wall of unit testing section of thick bamboo is middle to encircle to be provided with the confining pressure intermediate layer, confining pressure intermediate layer with be provided with flexible spacer sleeve between the core testing storehouse, confining pressure intermediate layer's top is provided with confining pressure pressurization mouth, confining pressure pressurization mouth's centre also is provided with carries the check valve, the middle corresponding connection of unit injection frame is provided with confining pressure interface, confining pressure interface with confining pressure pressurization mouth corresponds each other and sets up, confining pressure interface's centre is provided with the switch top depression bar.
The inner side of the port sealing cover is provided with a shaft pressing clamping plate, the center of the shaft pressing clamping plate is connected with a connecting conveying pipe, the outer end of the connecting conveying pipe is nested and slidably arranged on the inner side of the central conveying pipe, a sliding sealing ring is arranged around the edge of the shaft pressing clamping plate, the middle penetrating connection of the port sealing cover is provided with an axial pressurizing opening, the middle of the axial pressurizing opening is also provided with a conveying one-way valve, the middle of the unit injection and production frame is correspondingly connected with a shaft pressing interface, the shaft pressing interface and the axial pressurizing opening are correspondingly arranged, a switch jacking rod is arranged in the middle of the shaft pressing interface, and the outer ends of the shaft pressing interface are respectively and independently connected with a hydraulic conveying pump and a hydraulic pressure gauge.
The center department of lift leading truck is provided with the center uide bushing, the intermediate junction of center uide bushing is provided with the lifting screw, the axle head connection of lifting screw is provided with the screw motor, the inboard upper and lower both sides symmetry nested slip of center uide bushing is provided with the center spliced pole, the center department of center spliced pole is provided with the lift swivel nut, the center spliced pole passes through lift swivel nut and lifting screw interconnect, the lifting screw passes through the synchronous reverse removal of the center spliced pole that the bilateral symmetry set up about the lift swivel nut drive.
The device is characterized in that two unit injection and production frames are connected and arranged on the central connecting column, a rotary connecting ring is arranged at one end, close to the central connecting column, of each unit injection and production frame, the unit injection and production frames are connected with the central connecting column in a rotary mode through the rotary connecting ring, and the unit injection and production frames sequentially pass through a plurality of unit test cylinders arranged on the sample storage frames in a loading mode when the unit injection and production frames rotate along the central connecting column through the rotary connecting ring.
The middle of the rotary connecting ring is provided with an adjusting toothed ring in a surrounding mode, the outer side of the adjusting toothed ring is provided with an adjusting gear in a meshed connection mode, the shaft end of the adjusting gear is connected with an adjusting motor, and the adjusting motor is fixedly connected with the central connecting column.
The invention has the beneficial effects that the unit test barrels of the modularized design are adopted, so that the test of a plurality of core samples can be simultaneously carried out, the test efficiency is greatly improved, the plurality of unit test barrels can be independently tested, the sample storage rack can drive the unit test barrels loaded on the sample storage rack to sequentially pass through the unit injection and production rack, the unit injection and production rack is in butt joint with the unit test barrels through the lifting mechanism, the function of continuous test is realized, the test period is effectively shortened, and particularly, when the long-term injection and production process is required to be simulated, the waiting time can be obviously reduced, which means that more test data can be obtained in the same time period, and the time required for the test is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
FIG. 1 is a schematic diagram of a front structure of an embodiment of the present invention;
FIG. 2 is a schematic view of the bottom structure of an embodiment of the present invention;
FIG. 3 is a schematic view of a structure of a fixed test rack according to an embodiment of the present invention;
FIG. 4 is a schematic view of a sample storage rack according to an embodiment of the present invention;
FIG. 5 is a schematic view of a center pillar according to an embodiment of the present invention;
FIG. 6 is a schematic view of a storage sleeve according to an embodiment of the present invention;
FIG. 7 is a schematic view of a unit testing cartridge according to an embodiment of the present invention;
FIG. 8 is a schematic view showing the internal structure of a unit testing cartridge according to an embodiment of the present invention;
FIG. 9 is a schematic view of a port seal cap according to an embodiment of the present invention;
fig. 10 is a schematic structural view of a unit injection and production rack according to an embodiment of the invention.
Marked in the figure as:
1. Fixing a test frame; 101, rotating a gear; 102, a rotating motor; 103, sample storage rack, 104, rotary toothed ring, 105, storage sleeve, 106, spiral guide groove, 107, elastic locking block, 108, unlocking deflector rod, 109, read-write contact, 2, unit test cylinder, 201, spiral guide block, 202, locking clamping groove, 203, filling port, 204, closed screw thread, 205, core test bin, 206, confining pressure interlayer, 207, flexible spacer sleeve, 208, confining pressure pressurizing port, 209, storage chip, 210, storage contact, 3, port sealing cover, 301, connecting screw thread, 302, central conveying pipe, 303, injection and production port, 304, axial pressurizing port, 4, conveying one-way valve, 401, conical communicating port, 402, conical valve core, 403, sealing spring, 5, shaft clamping plate, 501, sliding sealing ring, 502, connecting conveying pipe, 6, lifting guide rack, 601, central guide sleeve, 602, lifting screw 603, screw motor, 604, central connecting column, 605, lifting screw sleeve, 606, adjusting gear, 607, adjusting motor, 7, unit injection rack, 701, rotary connecting toothed ring, 702, rotary connecting ring, adjusting ring, 903, injection and production pump, 803, fluid pressure meter, pump, 803, fluid pressure connector, pump, etc. 803, and pressure meter.
Detailed Description
The present invention will be further described in detail with reference to specific embodiments in order to make the objects, technical solutions and advantages of the present invention more apparent.
1-10, The rock stratum simulation test device for alternative injection and extraction of exhausted gas reservoirs comprises a fixed test frame 1, a sample storage frame 103, a storage sleeve 105, a unit test cylinder 2, a plurality of storage sleeves 105, a plurality of test tubes and a test tube, wherein the sample storage frame 103 is arranged in the middle of the fixed test frame 1 in a rotating connection manner; the sample storage rack 103 is provided with a plurality of unit test barrels 2 through the storage sleeve 105 in a loading mode, filling ports 203 are formed in the upper end and the lower end of each unit test barrel 2, a core test bin 205 is arranged in each unit test barrel 2, a connecting port sealing cover 3 is detachably connected to the middle of each filling port 203, each filling port 203 is kept closed through the corresponding port sealing cover 3, a central conveying pipe 302 is arranged at the center of each port sealing cover 3, the outer end of each central conveying pipe 302 is connected with a filling port 303, the middle of each filling port 303 is connected with a conveying one-way valve 4, a conical communication port 401 is formed in the interior of each conveying one-way valve 4, a conical valve core 402 is arranged in the middle of each conical communication port 401 in a jogging sliding mode, a sealing spring 403 is arranged in the middle of each conical valve core 402, a lifting guide frame 6 is connected in the middle of each fixing test frame 1, filling and sampling racks 7 are symmetrically arranged in a vertical sliding mode on the upper side and the lower side of each lifting guide frame 6, a filling and sampling port 8 is arranged at the middle of each unit filling frame 7, a filling and sampling port 8 is arranged at the outer end of each filling and sampling pipe 703, a filling port 8 is arranged between each filling port 8 and each filling port 303, a filling port is matched with a sampling port is arranged, a middle connection is arranged, a middle connecting pump is arranged, and a pump is connected between the middle connecting port and a pump is arranged, and the middle connecting pump is connected with the filling port 803 and the pump is arranged, and the pump is connected with the pump 803.
In this embodiment, the device adopts a unit testing cylinder 2 with modularized design, and the sample storage rack 103 loads and sets a plurality of unit testing cylinders 2 through the storage sleeve 105 at the same time, so that a plurality of core samples can be tested at the same time, the testing efficiency is greatly improved, the unit testing cylinders 2 can be filled with corresponding core samples through the filling ports 203 and are sealed through the port sealing covers 3, so as to maintain an internal sealed testing environment, when in testing, the rotating motor 102 drives the rotating toothed ring 104 surrounding the outer side of the sample storage rack 103 through the rotating gear 101 connected with the shaft ends, so as to drive the sample storage rack 103 to rotate, the sample storage rack 103 can drive the unit testing cylinders 2 loaded thereon to synchronously rotate at the moment and sequentially pass through the unit injection and sampling racks 7 which are arranged up and down symmetrically, so as to move up and down, at this time, the unit injection and production frame 7 can be mutually close to the top end and the bottom end of the corresponding unit testing cylinder 2, so that the injection and production port 303 on the central conveying pipe 302 is mutually connected with the injection and production interface 8, at this time, the booster conveying pump 9 can convey and store natural gas into the unit testing cylinder 2 from the central conveying pipe 302 at the top and pump out gas and moisture from the central conveying pipe 302 at the bottom, the injection and production conveying pipe 703 is connected with the injection and production pressure gauge 704 and the injection and production flow meter 705, so as to realize the storage of the natural gas according to the record adjustment of detection data, or pump out the natural gas stored in the core of the unit testing cylinder 2 from the central conveying pipe 302 at the top, meanwhile, the water is injected from the central conveying pipe 302 at the bottom to realize air drive, so as to simulate the process of injecting and pumping the natural gas in the gas reservoir, and as the middle of the injection and production port 303 is correspondingly provided with the conveying one-way valve 4, the conveying check valve 4 is embedded into the conical communication port 401 through the conical valve core 402 to realize unidirectional input, the switch pressing rod 803 is arranged in the middle of the injection and production port 8, when the injection and production port 8 is connected with the injection and production port 303, the switch pressing rod 803 synchronously presses the conical valve core 402, so that the conical valve core 402 is separated from the conical communication port 401, internal water vapor is further convenient to reversely output, the self-sealing function is realized, after the natural gas is injected or extracted from one unit testing cylinder 2, the next unit testing cylinder 2 can be moved between the unit injection and production frames 7 symmetrically arranged up and down through the rotation of the sample storage frame 103, the continuous testing function is realized, the testing period is effectively shortened, and particularly when the long-term injection and production process needs to be simulated, the waiting time can be remarkably shortened, and the time required by testing is reduced.
As shown in fig. 6-7, the inner side surface of the filling port 203 of the device is provided with a sealing thread 204 in a surrounding manner, the outer side surface of the port sealing cover 3 is provided with a connecting thread 301 in a surrounding manner, the port sealing cover 3 is detachably connected with the filling port 203 through the connecting thread 301 and the sealing thread 204 so as to be convenient for rapidly opening and sealing the filling port 203, the core is assembled and taken, meanwhile, the unit testing cylinder 2 is arranged on the inner side of the storage sleeve 105 in a nested sliding manner, the spiral guide groove 106 and the spiral guide block 201 are mutually matched in the loading process, so as to be convenient for positioning and buffering the unit testing cylinder 2 in the sliding mounting process from top to bottom, and after the unit testing cylinder 2 is in the sliding fit in place, the elastic locking block 107 can be embedded into the locking clamping groove 202 so as to lock the unit testing cylinder 2, and the elastic locking block 107 is driven by the unlocking deflector 108 to be separated from the locking clamping groove 202, the unit test cylinder 2 can be unlocked and disassembled, so that the unit test cylinder 2 is convenient to assemble and disassemble, the test of more core samples is realized, the test efficiency is improved, a storage chip 209 is arranged in the middle of the unit test cylinder 2, a storage contact 210 is arranged at the top of the outer wall of the unit test cylinder 2, a read-write contact 109 is arranged at the top of the inner wall of the storage sleeve 105, the storage contact 210 and the read-write contact 109 are mutually matched, when the unit test cylinder 2 is embedded and installed in the storage sleeve 105, the storage contact 210 and the read-write contact 109 are mutually contacted and connected, the storage chip 209 is mutually connected with a control computer arranged by the device through the storage contact 210 and the read-write contact 109, and all detection equipment and power equipment of the device are controlled by the control computer, various values of the corresponding unit testing cylinder 2, such as pressure, stored gas amount, storage time and the like, can be written and stored in the storage chip 209 through the control computer, so that the unit testing cylinder 2 can be conveniently marked and recorded, and when the stored unit testing cylinder 2 is reloaded into the storage sleeve 105, the unit testing cylinder 2 can be tested and operated according to data, and the convenience and accuracy of simulation test can be improved.
As shown in fig. 8-10, a unit testing cylinder 2 of the device is correspondingly provided with a confining pressure and shaft pressure simulation structure, a confining pressure interlayer 206 is arranged around the middle of the side wall of the unit testing cylinder 2, a flexible spacer 207 is arranged between the confining pressure interlayer 206 and a core testing bin 205, the top end of the confining pressure interlayer 206 is provided with a confining pressure pressurizing opening 208, the middle of a unit injection and production frame 7 is correspondingly connected with a confining pressure interface 801, when the unit injection and production frame 7 is lifted and lowered to be correspondingly connected with the unit testing cylinder 2, the confining pressure interface 801 and the confining pressure pressurizing opening 208 are correspondingly connected with each other, a switch top pressing rod 803 arranged in the middle of the confining pressure interface 801 is used for opening a conveying one-way valve 4 also arranged in the middle of the confining pressure pressurizing opening 208 so as to regulate and control the confining pressure of the corresponding unit testing cylinder 2 through a hydraulic conveying pump 804 and a hydraulic pressure gauge 805, the inner side of a port sealing cover 3 is provided with a shaft pressure clamping plate 5, the center of the shaft pressing clamping plate 5 is connected with a connecting conveying pipe 502, the outer end of the connecting conveying pipe 502 is nested and slidingly arranged on the inner side of the central conveying pipe 302, a sliding sealing ring 501 is arranged around the edge of the shaft pressing clamping plate 5, so that the sealing is convenient to keep closed, an axial pressing port 304 is arranged in the middle of the port sealing cover 3 in a penetrating way, a conveying one-way valve 4 is also arranged in the middle of the axial pressing port 304, when the lifting and lowering are correspondingly connected with the unit testing cylinder 2, the shaft pressing port 802 and the axial pressing port 304 are correspondingly connected with each other, the conveying one-way valve 4 also arranged in the middle of the shaft pressing port is opened through a switch pressing rod 803 arranged in the middle of the shaft pressing port 802, so that the shaft pressing of the corresponding unit testing cylinder 2 is regulated and controlled through a hydraulic conveying pump 804 and a hydraulic pressure gauge 805, the regulation of pressure is realized, and each unit testing cylinder 2 can independently simulate the corresponding confining pressure and the shaft pressing, allowing multiple samples to be tested simultaneously under the same conditions, or under different conditions within the same test period, enhances the flexibility of testing.
As shown in fig. 4-5, a central guide sleeve 601 is arranged at the center of a lifting guide frame 6 of the device, a lifting screw 602 is arranged in the middle of the central guide sleeve 601, a screw motor 603 is arranged at the shaft end of the lifting screw 602, a central connecting column 604 is symmetrically nested and slidingly arranged at the upper side and the lower side of the inner side of the central guide sleeve 601, a lifting screw sleeve 605 is arranged at the center of the central connecting column 604, the central connecting column 604 is mutually connected with the lifting screw 602 through the lifting screw sleeve 605, the lifting screw 602 drives the central connecting column 604 symmetrically arranged at the upper side and the lower side to synchronously and reversely move through the lifting screw sleeve 605, and two unit injection and production frames 7 are connected to the central connecting column 604, so that the unit injection and production frames 7 can be driven to synchronously move, and the unit test tube 2 can be regulated and injected and produced.
As shown in fig. 4-5 and fig. 10, two unit injection and production frames 7 are connected and arranged on a central connecting column 604 of the device, a linkage structure is arranged between the two unit injection and production frames 7, an injection and production three-way valve 901 is arranged between an injection and production conveying pipe 703 and a pressurizing conveying pump 9, the injection and production conveying pipe 703 and the pressurizing conveying pump 9 are connected through the injection and production three-way valve 901, a communication conveying pipe 902 is connected and arranged at the other end of the injection and production three-way valve 901, a storage tank 903 is arranged at the outer end of the communication conveying pipe 902 in a connecting way, natural gas and water can be respectively stored in the storage tanks 903 which are arranged on the upper side and the lower side in a connecting way, a pipeline connected with the injection and production interface 8, the confining pressure interface 801 and the shaft pressure interface 802 is of a flexible telescopic hose structure, so that the unit injection and production frames 7 are conveniently adjusted up and down, the injection and production three-way valve 901 is controlled and adjusted, the injection and production conveying pipe 703 in the middle of any one unit injection and production frame 7 is communicated with the storage tank 903 through the two injection and production three-way valve 901 and the pressurizing conveying pump 9, the storage tank 903 is conveniently communicated with each other, the storage tank 903 is conveniently, the storage tank 903 is connected with the corresponding to the storage tank 903 or the storage tank 7 in the storage tank 7 or the corresponding to the storage tank 2 in the two unit injection and the storage tank 7 or the two unit 7, the two unit injection and the two unit 7 are simultaneously pumped in the two unit injection and the storage frames 2 are simultaneously, and the test tank 2 are connected with the storage tank 2, and the test tank 2 are simultaneously connected with the storage tank 2, is favorable for further shortening the experimental period.
As shown in fig. 4-5, one end of a unit injection and production frame 7 of the device, which is close to a central connecting column 604, is provided with a rotary connecting ring 701, the unit injection and production frame 7 is rotationally connected with the central connecting column 604 through the rotary connecting ring 701, when the unit injection and production frame 7 rotates along the central connecting column 604, a plurality of unit test cylinders 2 which are arranged on the sample storage frame 103 are sequentially loaded, an adjusting toothed ring 702 is arranged in the middle of the rotary connecting ring 701 in a surrounding manner, an adjusting gear 606 is arranged on the outer side of the adjusting toothed ring 702 in a meshed connection manner, an adjusting motor 607 is arranged on the shaft end of the adjusting gear 606 in a connected manner, and the adjusting motor 607 is fixedly connected with the central connecting column 604, so that the adjusting motor 607 can drive the rotary connecting ring 701 to rotate through the adjusting gear 606 and the adjusting toothed ring 702, and further drive the unit injection and production frame 7 to move so as to adjust the relative positions and angles of the two unit injection and production frames 7, thereby realizing synchronous linkage adjustment operation of any two unit test cylinders 2, and further facilitating adjustment of test steps and period, and improving experimental flexibility.
When in use, corresponding pipelines of the device are connected, corresponding core samples are filled through the filling port 203, the port sealing cover 3 is screwed into the filling port 203 through the connecting thread 301 and the sealing thread 204 to seal the core samples, then the unit testing cylinder 2 is slidably installed by the unit testing cylinder 2, after the unit testing cylinder 2 is slidably embedded and installed in place, the elastic locking block 107 can be embedded into the locking clamping groove 202 to lock the unit testing cylinder 2, when in test, the rotating motor 102 drives the rotating toothed ring 104 which surrounds the outer side of the sample storage frame 103 through the rotating gear 101 connected with the shaft end to drive the sample storage frame 103 to rotate, and the sample storage frame 103 can drive the unit testing cylinder 2 loaded on the sample storage frame 103 to synchronously rotate at the moment, and sequentially pass through the unit injection and production frames 7 symmetrically arranged up and down, then the central connecting column 604 is connected with the lifting screw 602 through the lifting screw 605, the lifting screw 602 drives the central connecting column 604 symmetrically arranged at the upper side and the lower side through the lifting screw 605 to synchronously and reversely move, the central connecting column 604 is connected with two unit injection and production frames 7, and then the unit injection and production frames 7 can be driven to synchronously move, at the moment, the unit injection and production frames 7 can be mutually close to the top end and the bottom end of the corresponding unit test cylinder 2, so that the injection and production port 303 on the central conveying pipe 302 is mutually connected with the injection and production interface 8, when the injection and production interface 8 is mutually connected with the injection and production port 303, the switch pressing rod 803 synchronously presses the conical valve core 402, so that the conical valve core 402 is separated from the conical communication port 401 to facilitate the reverse output of internal water vapor, at this time, the booster pump 9 conveys and stores natural gas into the unit testing cylinder 2 from the central conveying pipe 302 at the top, and pumps the gas and moisture out of the central conveying pipe 302 at the bottom, so as to store the natural gas, or pumps the natural gas stored in the core of the unit testing cylinder 2 from the central conveying pipe 302 at the top, meanwhile, water is injected from the central conveying pipe 302 at the bottom to realize gas driving so as to simulate the process of injecting and extracting natural gas from the depleted gas reservoir of the stratum, after one unit testing cylinder 2 performs natural gas injection or extraction, when the injection and extraction interface 8 and the injection and extraction port 303 are connected with each other, the switch top pressure rod 803 synchronously pushes the conical valve core 402, so that the conical valve core 402 is separated from the open conical communication port 401, so that internal water is convenient to reversely output, reversely moves and resets, the injection and extraction port 303 is separated from the injection and extraction interface 8, and then the next unit testing cylinder 2 is moved between the unit injection and extraction frames 7 symmetrically arranged up and down through the rotation of the sample storage frame 103, so that continuous testing is realized.
The discussion of any of the embodiments above is merely exemplary and is not intended to suggest that the scope of the invention is limited to these examples. Any omission, modification, equivalent replacement, improvement, etc. of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The rock stratum simulation test device for alternating injection and production of depleted gas reservoirs comprises a fixed test frame (1), wherein the fixed test frame (1) is rotationally connected with a sample storage frame (103), and is characterized by further comprising a storage sleeve (105) and a unit test cylinder (2) which is nested and slidingly arranged on the inner side of the storage sleeve (105), the storage sleeves (105) are circumferentially and uniformly arranged in the middle of the sample storage frame (103) in a surrounding mode, filling ports (203) are respectively arranged at the upper end and the lower end of the unit test cylinder (2), a core test bin (205) is arranged in the unit test cylinder (2), a port sealing cover (3) is arranged in the middle of the filling ports (203), a central conveying pipe (302) is arranged at the center of the port sealing cover (3), an injection and production port (303) is connected to the outer end of the central conveying pipe (302), a conveying one-way valve (4) is arranged in the middle of the injection and production port (303), a conical communication port (401) is arranged in the middle of the conveying one-way valve (4), a conical valve core (402) is arranged in a sleeved mode, a conical valve core (402) is arranged in the middle of the unit test cylinder (2), a middle of the conical communication port (403) is connected with a guide frame (6), a lifting guide frame (6) is connected with the two-side lifting and a lifting guide frame (6) is arranged at the center of the vertical lifting frame, the middle of the unit injection and production frame (7) is connected with an injection and production conveying pipe (703), the outer end of the injection and production conveying pipe (703) is provided with an injection and production interface (8), the injection and production interface (8) and the injection and production port (303) are mutually matched, the middle of the injection and production interface (8) is connected with a switch top pressure rod (803), and the other end of the injection and production conveying pipe (703) is connected with a pressurizing conveying pump (9).
2. The rock stratum simulation test device for the alternating injection and production of the depleted gas reservoir according to claim 1, wherein the inner side surface of the filling port (203) is provided with a sealing thread (204) in a surrounding mode, the outer side surface of the port sealing cover (3) is provided with a connecting thread (301) in a surrounding mode, and the port sealing cover (3) is detachably connected with the filling port (203) through the connecting thread (301) and the sealing thread (204).
3. The rock stratum simulation test device for alternative injection and production of depleted gas reservoirs according to claim 1, wherein a spiral guide groove (106) is formed in the middle of the side wall of the storage sleeve (105), a spiral guide block (201) is arranged in the middle of the outer wall of the unit test cylinder (2), the spiral guide groove (106) and the spiral guide block (201) are mutually matched, a locking clamping groove (202) is formed in the middle of the spiral guide block (201), an elastic locking block (107) is horizontally arranged in the middle of the spiral guide groove (106) in a sliding mode, the elastic locking block (107) is mutually matched with the locking clamping groove (202), and an unlocking deflector rod (108) is arranged at the outer end of the elastic locking block (107) in a connecting mode.
4. The rock stratum simulation test device for alternative injection and production of depleted gas reservoir according to claim 1, wherein a storage chip (209) is installed in the middle of the unit test cylinder (2), a storage contact (210) is arranged at the top of the outer wall of the unit test cylinder (2), a read-write contact (109) is arranged at the top of the inner wall of the storage sleeve (105), and the storage contact (210) and the read-write contact (109) are mutually matched.
5. The rock stratum simulation test device for alternative injection and production of depleted gas reservoirs according to claim 1, wherein a confining pressure interlayer (206) is arranged in the middle of the side wall of the unit test cylinder (2), a flexible spacer sleeve (207) is arranged between the confining pressure interlayer (206) and the core test bin (205), a confining pressure pressurizing opening (208) is arranged at the top end of the confining pressure interlayer (206), a conveying one-way valve (4) is arranged in the middle of the confining pressure pressurizing opening (208), confining pressure interfaces (801) are correspondingly connected in the middle of the unit injection and production frame (7), the confining pressure interfaces (801) and the confining pressure pressurizing opening (208) are correspondingly arranged, and a switch pressing rod (803) is arranged in the middle of the confining pressure interfaces (801).
6. The rock stratum simulation test device for alternative injection and production of depleted gas reservoirs according to claim 5, wherein an axial pressure clamping plate (5) is arranged on the inner side of the port sealing cover (3), a connecting conveying pipe (502) is connected and arranged at the center of the axial pressure clamping plate (5), the outer end of the connecting conveying pipe (502) is nested and slidingly arranged on the inner side of the central conveying pipe (302), a sliding sealing ring (501) is arranged around the edge of the axial pressure clamping plate (5), an axial pressure port (304) is arranged in the middle of the port sealing cover (3) in a penetrating manner, a conveying one-way valve (4) is also arranged in the middle of the axial pressure port (304), an axial pressure interface (802) is correspondingly arranged in the middle of the unit injection and production frame (7), a switch pushing rod (803) is arranged in the middle of the axial pressure interface (802), and a conveying hydraulic pump (805) and a hydraulic pressure gauge (805) are independently arranged at the outer ends of the axial pressure interface (802).
7. The rock stratum simulation test device for alternative injection and production of depleted gas reservoirs according to claim 1, wherein a central guide sleeve (601) is arranged at the center of the lifting guide frame (6), a lifting screw (602) is arranged in the middle of the central guide sleeve (601), a screw motor (603) is arranged at the shaft end of the lifting screw (602) in a connecting mode, a central connecting column (604) is arranged on the upper side and the lower side of the inner side of the central guide sleeve (601) in a symmetrical nested sliding mode, a lifting screw sleeve (605) is arranged at the center of the central connecting column (604), the central connecting column (604) is connected with the lifting screw (602) through the lifting screw sleeve (605), and the lifting screw (602) drives the central connecting column (604) arranged on the upper side and the lower side in a symmetrical mode to synchronously and reversely move through the lifting screw sleeve (605).
8. The rock stratum simulation test device for alternative injection and production of depleted gas reservoirs according to claim 7, wherein two unit injection and production frames (7) are connected and arranged on the central connecting column (604), one end, close to the central connecting column (604), of each unit injection and production frame (7) is provided with a rotary connecting ring (701), each unit injection and production frame (7) is rotationally connected with the central connecting column (604) through the rotary connecting ring (701), and each unit injection and production frame (7) sequentially passes through a plurality of unit test cylinders (2) arranged on the sample storage frame (103) when the unit injection and production frames (7) rotate along the central connecting column (604) through the rotary connecting ring (701).
9. The rock stratum simulation test device for alternative injection and production of depleted gas reservoirs according to claim 8, wherein an adjusting toothed ring (702) is arranged in the middle of the rotary connecting ring (701) in a surrounding mode, an adjusting gear (606) is arranged on the outer side of the adjusting toothed ring (702) in a meshed connection mode, an adjusting motor (607) is arranged on the shaft end of the adjusting gear (606) in a connected mode, and the adjusting motor (607) is fixedly connected with the central connecting column (604).
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| CN202411792171.2A CN119801640B (en) | 2024-12-06 | 2024-12-06 | A rock formation simulation test device for alternating injection and production of a depleted gas reservoir gas storage |
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| CN120254196A (en) * | 2025-06-04 | 2025-07-04 | 太原理工大学 | A carbon dioxide storage test device and method based on porous media |
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