Honeycomb type salt cavern gas storage and cavity building and gas injection and production method thereof

Abstract

The honeycomb type salt cavern gas storage comprises a central well site and a satellite well site, and is characterized in that the central well site is provided with a central well, the satellite well site is provided with at least three satellite wells, and the satellite wells are located on the same circumference and surround the central well; cavities are formed in the bottoms of the satellite wells and the center well, the bottoms of the satellite wells are communicated in pairs through first horizontal wells to form communication channels, and the center well is communicated with any satellite well through a second horizontal well. Compared with the prior art, the satellite well and the center well form a topological network, multi-cavity linkage is achieved in cooperation with an inclined shaft system, compared with square distribution and hexagonal distribution, the space utilization rate is remarkably increased, for example, only 7 injection-production wells and 3 brine discharging wells are needed while 7 salt cavities are built, the land use range needed by well mouth arrangement is small, and the construction cost is low. Only one large well site and six small well sites are needed, and the ground land use range is effectively reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of salt cavern gas storage, and in particular to a honeycomb salt cavern gas storage and a cavity making and gas injection and production method thereof. Background Art

[0002] At present, most domestic salt cavern gas storage facilities adopt single-well single-cavity or double-well single-cavity models. A single gas storage facility requires 3,300 acres of land to build ground storage tanks, while a salt cavern storage facility of the same capacity only requires 400 acres. However, the existing well layout method still has significant defects: on the one hand, the single-well single-cavity model requires separate configuration of gas injection and production wells and brine drainage wells, resulting in scattered distribution of ground well sites and low integration of mines and land; on the other hand, the traditional four-square well layout method has a space utilization rate of less than 40%, and the spacing between dissolution cavities in underground salt layers needs to maintain a safe distance of 2 times the cavity diameter, resulting in about 60% of salt mine resources being unable to be effectively developed.

[0003] In addition, in the existing technology, salt cavern construction mostly adopts natural dissolution technology. Although the operation is simple, the cavity shape is uncontrollable, and it is easy to form a columnar cavity with a diameter of 70m and a height of 150m, resulting in a high redundancy of the safety distance between adjacent cavities. At the same time, the single-cavity gas injection and production process requires an independent brine drainage system, the brine treatment efficiency is low, and it is difficult to achieve multi-cavity linkage peak regulation.

[0004] These technical bottlenecks have severely restricted the application of salt cavern gas storage in actual production. Therefore, there is an urgent need for a honeycomb salt cavern gas storage and its cavity making and gas injection and production method to solve the above problems. Summary of the invention

[0005] The main purpose of the present invention is to provide a honeycomb salt cavern gas storage and a cavity making and gas injection and production method thereof.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] A honeycomb salt cavern gas storage reservoir comprises a central well site and a satellite well site, wherein the central well site is provided with a central well, and the satellite well site is provided with at least three satellite wells, wherein the satellite wells are on the same circumference and surround the central well, wherein cavities are formed at the bottoms of the satellite wells and the central well, wherein the bottoms of the satellite wells are connected in pairs through a first horizontal well to form a connecting channel, wherein the central well is connected with any satellite well through a second horizontal well, and further comprising a plurality of inclined wells, wherein the plurality of inclined wells respectively extend to the bottom open hole sections of non-adjacent satellite wells.

[0008] Furthermore, the distance between adjacent satellite wells is ≥250m.

[0009] Furthermore, the horizontal distance between the inclined well trajectory and the central well cavity is ≥50m, and the end point is located ≥200m below the top of the satellite well cavity.

[0010] The present invention also discloses a method for creating a cavity in a honeycomb - type salt - cavern gas storage, which includes the following steps:

[0011] Step 1: Drill a satellite well to the bottom of the salt layer, and then drill a first horizontal well so that the satellite wells are connected in pairs through the first horizontal well to form a communication channel;

[0012] Step 2: Drill a central well and a second horizontal well, and make the central well communicate with any one of the satellite wells through the second horizontal well;

[0013] Step 3: Drill an inclined well and make the inclined well extend to the open - hole section at the bottom of the vertical section of the satellite well so that the inclined well communicates with the first horizontal well;

[0014] Step 4: Inject fresh water into the satellite wells and the central well synchronously, and dynamically adjust the brine discharge volume through the inclined well to control the diameter of the connected cavity dissolved out in the first horizontal well and the second horizontal well within 10 - 15 m;

[0015] Step 5: Conduct solution - cavity formation based on the central well and the satellite wells. Through ultrasonic logging feedback, use the nitrogen - resistant solution technology to control the growth of the cavity. The height difference between the cavities of the satellite wells and the central well is ≤ 20 m.

[0016] Further, in Step 3, when the inclined well descends to a depth at a height from the designed top of the salt cavity, it starts to build slope. The slope formula is:

[0017] When H - x2 ≤ y ≤ H + H1, the drilling slope formula is:

[0018]

[0019] In the formula: x is the horizontal distance between the pipeline and the wellhead of the inclined well; y is the vertical distance between the pipeline and the wellhead of the inclined well; H is the distance between the cavity top and the wellhead; H1 is the distance between the designed top of the salt cavity and the bottom of the initial solution cavity; x1 is the distance between the wellhead of the inclined well and the wellhead of the central well, 10 ≤ x1 ≤ 15; x2 is the vertical distance between the slope - building point and the designed top of the salt cavity, x2 ≥ 200; D is the designed diameter of the salt cavity; d is the horizontal distance between the end of the inclined well and the center of the bottom of the initial solution cavity of the central well, 250 ≤ d ≤ 350.

[0020] Further, in Step 1, use an acoustic signal transmitter and receiver to directionally control the first horizontal well to connect adjacent satellite wells, and retain an open - hole section of 200 - 250 m.

[0021] The present invention also discloses a gas injection and production method for a honeycomb - type salt - cavern gas storage, including:

[0022] Gas injection and brine discharge stage:

[0023] Step 1: Inject natural gas into the connected cavity through the central well and discharge brine through the inclined well;

[0024] Step 2: Based on the difference in the burial depth of the cavities, inject gas into the cavity with the deepest burial depth first, and then inject gas into the cavities with shallower burial depths;

[0025] Step 3: During the synchronous gas injection process, adjust the gas injection rate of each cavity in real time so that the height difference of the gas-liquid interfaces between the cavities ≤ 10 m;

[0026] Step 4: When terminating the gas injection, ensure that the final height of the gas-liquid interface is not lower than the safety height threshold of the cavity with the shallowest burial depth.

[0027] Gas production stage:

[0028] Step 5: Carry out gas production through the central gas injection well and selectively supplement brine through the inclined wells;

[0029] Step 6: Based on the difference in the burial depth of the cavities, produce gas from the cavity with the shallowest burial depth first, and then produce gas from the cavities with deeper burial depths;

[0030] Step 7: During the synchronous gas production process, adjust the gas production rate of each cavity in real time so that the height difference of the gas-liquid interfaces between the cavities ≤ 10 m;

[0031] Step 8: When terminating the gas production, ensure that the final height of the gas-liquid interface is not higher than the safety height threshold of the cavity with the deepest burial depth.

[0032] Furthermore, in Step 2, based on the difference in the number of communication channels between the cavities, inject gas into the cavity with more communication channels first, and then inject gas into the cavity with fewer communication channels.

[0033] Furthermore, in Step 6, based on the difference in the number of communication channels between the cavities, produce gas from the cavity with fewer communication channels first, and then produce gas from the cavity with more communication channels.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] 1. The present invention forms a topological network through satellite wells and a central well, and realizes multi-cavity linkage in cooperation with the inclined well system. Compared with the quadrilateral distribution, the hexagonal distribution significantly improves the space utilization rate. For example, when building 7 salt cavities, only 7 gas injection / production wells and 3 brine drainage wells are required, and the land area required for the wellhead layout is small, only 1 large well field and 6 small well fields are needed, effectively reducing the ground land area.

[0036] 2. The honeycomb well layout of the present invention reduces the total length of the horizontal wells, thereby significantly reducing the construction cost. Moreover, the setting of the shared inclined wells can reduce the energy consumption required for brine collection and improve the economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic structural diagram of a honeycomb-type salt cavern gas storage reservoir of the present invention.

[0038] In the figure: 1, cavity; 2, satellite well; 3, central well; 4, inclined well; 5, communication channel. Specific implementation mode

[0039] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation modes.

[0040] Embodiment 1:

[0041] A honeycomb-shaped salt cavern gas storage includes a central well field and a satellite well field. One central well is arranged in the central well field, and at least three satellite wells are arranged in the satellite well field. The satellite wells are on the same circumference and surround the central well. Cavities are formed at the bottoms of the satellite wells and the central well. The bottoms of the satellite wells are connected pairwise through a first horizontal well to form a communication channel. The central well is connected to any one of the satellite wells through a second horizontal well. It also includes several inclined wells, and the several inclined wells respectively extend to the bottom open hole sections of non-adjacent satellite wells.

[0042] Among them, the distance between adjacent satellite wells ≥ 250m.

[0043] Among them, the horizontal distance between the inclined well trajectory and the central well cavity ≥ 50m, and the end point is located ≥ 200m below the top of the satellite well cavity.

[0044] The present invention also discloses a method for creating a cavity in a honeycomb-shaped salt cavern gas storage, including the following steps:

[0045] Step 1: Drill the satellite well to the bottom of the salt layer, and then drill the first horizontal well so that the satellite wells are connected pairwise through the first horizontal well to form a communication channel;

[0046] Step 2: Drill the central well and the second horizontal well, and make the central well connected to any one of the satellite wells through the second horizontal well;

[0047] Step 3: Drill the inclined well, and make the inclined well extend to the bottom open hole section of the satellite well vertical shaft section so that the inclined well is connected to the first horizontal well;

[0048] Step 4: Inject fresh water into the satellite well and the central well simultaneously, and dynamically adjust the brine discharge volume through the inclined well to control the diameter of the connected cavity dissolved by the first horizontal well and the second horizontal well within 10 - 15m;

[0049] Step 5: Carry out solution cavity formation based on the central well and the satellite well. Through ultrasonic logging feedback, use the nitrogen gas resistance solution technology to control the growth of the cavity, and the height difference between the satellite well cavity and the central well cavity ≤ 20m.

[0050] Furthermore, in Step 3, when the inclined well is lowered to a depth at a height from the designed top of the salt cavity, the inclination is made, and the slope formula is:

[0051] When \(H - x2\leq y\leq H + H1\), the drilling slope formula is:

[0052]

[0053] Where: \(x\) is the horizontal distance of the pipeline from the wellhead of the deviated well; \(y\) is the vertical distance of the pipeline from the wellhead of the deviated well; \(H\) is the distance from the top of the cavity to the wellhead; \(H1\) is the distance between the top of the designed salt cavity and the bottom of the initial dissolution cavity; \(x1\) is the distance between the wellhead of the deviated well and the wellhead of the central well, \(10\leq x1\leq15\); \(x2\) is the vertical distance between the kick-off point and the top of the designed salt cavity, \(x2\geq200\); \(D\) is the diameter of the designed salt cavity; \(d\) is the horizontal distance between the end of the deviated well and the center of the bottom of the initial dissolution cavity of the central well, \(250\leq d\leq350\). The above units are all m.

[0054] In Step 1, a sonic signal transmitter and receiver are used to directionally control the connection of the first horizontal well to adjacent satellite wells, and a 200 - 250 m open hole section is retained.

[0055] The present invention also discloses a gas injection and production method for a honeycomb - type salt cavern gas storage; it includes:

[0056] Gas injection and brine drainage stage:

[0057] Step 1: Inject natural gas into the connected cavity through the central well and discharge brine through the deviated well;

[0058] Step 2: Based on the difference in cavity burial depth, inject gas into the cavity with the deepest burial depth first, and then inject gas into the cavities with shallower burial depths;

[0059] Step 3: During the synchronous gas injection process, adjust the gas injection rate of each cavity in real - time so that the height difference of the gas - liquid interface between cavities \(\leq10\) m;

[0060] Step 4: When terminating gas injection, ensure that the final gas - liquid interface height is not lower than the safety height threshold of the cavity with the shallowest burial depth.

[0061] Gas production stage:

[0062] Step 5: Conduct gas production through the central gas injection well and selectively supplement brine through the deviated well;

[0063] Step 6: Based on the difference in cavity burial depth, produce gas from the cavity with the shallowest burial depth first, and then produce gas from the cavities with deeper burial depths;

[0064] Step 7: During the synchronous gas production process, adjust the gas production rate of each cavity in real - time so that the height difference of the gas - liquid interface between cavities \(\leq10\) m;

[0065] Step 8: When terminating gas production, ensure that the final gas - liquid interface height is not higher than the safety height threshold of the cavity with the deepest burial depth.

[0066] In step two, based on the difference in the number of communication channels between cavities, gas is injected preferentially into the cavity with more communication channels, and then into the cavity with fewer communication channels.

[0067] In step six, based on the difference in the number of communication channels between cavities, gas is extracted preferentially from the cavity with fewer communication channels, and then from the cavity with more communication channels.

[0068] Embodiment 2:

[0069] This embodiment is a well pattern with 6 satellite wells and 1 central well.

[0070] Specifically:

[0071] The wells are arranged in the pattern of a honeycomb. One central well is set in the middle of the well group, and 6 satellite wells are evenly arranged around it. Both the central well and the satellite wells are vertical wells. The central cavity is connected to 1 satellite cavity, and adjacent satellite cavities are connected to each other in pairs. 3 brine drainage wells are evenly set beside the central well. The brine drainage wells are inclined wells that extend to the bottom of the vertical well section of the satellite wells for draining the brine of 7 wells.

[0072] A second horizontal well is drilled down in the vertical well of the central well and extends to the vicinity of the lower part of the vertical well of 1 satellite well. The first horizontal well is drilled down in the vertical wells of 6 satellite wells and extends to the vicinity of the lower part of the vertical well of adjacent satellite wells. 3 brine drainage wells are evenly set near the central well. The brine drainage wells are connected to 3 satellite wells in the form of inclined wells and are staggered from the satellite wells connected to the central well. Communication channels are created by solution cavities through the first horizontal well and the second horizontal well, and communication is formed by common solution cavities at the terminal of the horizontal well and the vicinity of the lower part of the vertical well. After connecting the bottoms of the central well and the 6 wells, the solution cavities of the horizontal wells are stopped. The solution cavities of the central vertical well and the 6 vertical wells form cavities, finally forming 1 central cavity and 6 satellite cavities. The 6 satellite cavities are connected in sequence, and the central cavity is connected to one of the satellite cavities. After the solution cavities are completed, there are a total of 7 injection and production gas wells and 3 brine drainage wells in the well group, 1 central well site, and 6 satellite well sites.

[0073] The distance between the wellheads of adjacent satellite wells is not less than 250m, and the distance from the satellite wells to the central well is not less than 250m. The adjacent well spacing is determined comprehensively based on factors such as the geological characteristics and mechanical properties of the salt layer. Among them, the burial depth of the 7 cavities is 1500m - 1600m, and the horizontal height difference between the cavities should not exceed 20m to avoid the gas-liquid interface in some cavities being too high or too low due to different cavity heights. The diameter of the cavity is 80 - 100m.

[0074] The position of the inclined well needs to avoid the cavity of the central well to prevent the solution of the central well cavity to the inclined well pipeline.

[0075] The construction method of the above 6 satellite wells and 1 central well is specifically as follows:

[0076] S1: First, drill into Well Gas 2 to the vertical shaft of Well Gas 7 (i.e., the satellite well) to the designed depth; then drill the horizontal well of Well Gas 2 to the bottom of the vertical shaft section of Well Gas 7, leaving the open hole section; then drill the horizontal well of Well Gas 3 to connect with the bottom of the vertical shaft of Well Gas 2, leaving the open hole section; then drill the horizontal well of Well Gas 4 to connect with the bottom of the vertical shaft of Well Gas 3, leaving the open hole section; then drill the horizontal well of Well Gas 5 to connect with the bottom of the vertical shaft of Well Gas 4, leaving the open hole section; then drill the horizontal well of Well Gas 6 to connect with the bottom of the vertical shaft of Well Gas 5, leaving the open hole section; then drill the vertical shaft and horizontal well of Well Gas 7. The vertical shaft of Well Gas 7 is drilled to connect with the end of the horizontal well of Well Gas 2, and the horizontal well is drilled to connect with the bottom of the vertical shaft of Well Gas 6 (the above horizontal wells in this section are the first horizontal wells).

[0077] Then drill the vertical shaft of Well Gas 1 (i.e., the central well) and the second horizontal well. The second horizontal well connects Well Gas 1 with the bottom of Well Gas 2, leaving the open hole section; then simultaneously drill Well Brine 1, Well Brine 2, and Well Brine 3 beside the central well to connect with the bottom of the vertical shaft sections of Well Gas 3, Well Gas 5, and Well Gas 7; adopt the mode of vertical shaft water injection and inclined shaft brine drainage to form a circulating dissolution cavity with 7 wells for water injection and 3 wells for brine drainage; when drilling the horizontal wells, it is necessary to control the height difference between the starting point and the ending point of the 7 horizontal wells not to exceed 5m.

[0078] S2: Simultaneously inject fresh water or fresh brine into Well Gas 1 to Well Gas 7 to dissolve the salt rock in the horizontal well section, and simultaneously discharge the high-concentration brine through Well Brine 1 to Well Brine 3 to form a horizontal channel and gradually expand the channel volume; the central well channel and the satellite well channels inject water and create channels simultaneously, reducing the channel creation time and ensuring that the diameters of each channel are close. The diameter of the horizontal section channel is controlled to be 10 - 15m; during the process of creating channels in the horizontal section, control the water injection flow rates of different wells according to the dissolution rates of different channels to ensure that the channel dimensions meet the design requirements.

[0079] After the horizontal section channel is dissolved to the target diameter, carry out cavity creation design with the target of a single cavity volume of 800,000 - 1,000,000 cubic meters. The diameter of the dissolution cavity is 80 - 100m, leaving a roof of more than 50m. Carry out water dissolution cavity creation in the vertical shaft section according to the principle from bottom to top. The first dissolution layer is located at the bottom of the salt layer. Use equipment such as ultrasonic logging and gyroscopic inclinometer to monitor the shape, diameter, height, and the change of the roof thickness of the dissolution cavity in real time; according to the cavity creation speed differences caused by different numbers of connecting channels between the central well and different satellite well cavities, flexibly adopt methods such as nitrogen gas dissolution resistance to control the cavity shape, ensuring that the height difference between the 7 cavities does not exceed 20m, and avoiding the gas-liquid interface of some cavities being too high or too low due to different cavity heights; when the cavity height and the cavity diameter reach the design values, the cavity creation ends.

[0080] The gas injection and production method for the above 6 satellite wells and 1 central well, specifically:

[0081] S1: After cavity formation, natural gas is injected through the gas injection well, and brine is discharged through the inclined well. Since the number of cavity connection channels between the central well and different satellite wells is different, and at the same time, there are differences in the shapes and burial depths of different cavities, it is necessary to flexibly control the gas injection rates between different gas wells. Generally, the principle of injecting gas into the cavity with a deeper burial depth first and then into the cavity with a shallower burial depth, and injecting gas into the cavity with a larger number of connection channels first and then into the cavity with a smaller number of connection channels is adopted, and then gas injection and brine drainage are maintained simultaneously. During the gas injection process, it is necessary to control the gas injection rates of different wells to always ensure that the height difference of the gas-liquid interface between each cavity is controlled within 10 m, and the final height of the gas-liquid interface shall not be lower than the safety height of the gas-liquid interface in the cavity with the shallowest burial depth.

[0082] S2: During the gas production stage, gas is produced through the gas injection well, and brine is selectively supplemented through the inclined well according to the cavity conditions. Since the number of cavity connection channels between the central well and different satellite wells is different, and at the same time, there are differences in the shapes and burial depths of different cavities, it is necessary to flexibly control the gas production rates between different gas wells. Generally, the principle of producing gas from the cavity with a shallower burial depth first and then from the cavity with a deeper burial depth, and producing gas from the cavity with a smaller number of connection channels first and then from the cavity with a larger number of connection channels is adopted, and then gas production is maintained simultaneously. During the gas production process, it is necessary to control the gas production rate to ensure that the height difference of the gas-liquid interface between each cavity is controlled within 10 m, and the final height of the gas-liquid interface shall not be higher than the safety height of the gas-liquid interface in the cavity with the deepest burial depth.

[0083] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A honeycomb - type salt - cavern gas storage, comprising a central well field and satellite well fields, characterized in that: A central well is set in the central well site, and at least three satellite wells are set in the satellite well sites. The satellite wells are on the same circumference and surround the central well. Cavities are formed at the bottoms of the satellite wells and the central well. The bottoms of the satellite wells are connected pairwise through first horizontal wells to form a communication channel. The central well is connected to any one of the satellite wells through a second horizontal well. There are also several inclined wells, and the several inclined wells respectively extend to the open hole sections at the bottoms of non-adjacent satellite wells.

2. The honeycomb - type salt - cavern gas storage reservoir according to claim 1, wherein: The distance between adjacent satellite wells ≥ 250 m.

3. The honeycomb - type salt - cavern gas storage reservoir according to claim 1, wherein: The horizontal distance between the trajectory of the inclined well and the cavity of the central well ≥ 50 m, and the end point is located ≥ 200 m below the top of the cavity of the satellite well.

4. A method for creating a cavity in the honeycomb-shaped salt cavern gas storage reservoir according to any one of claims 1-3, characterized in that: It includes the following steps: Step 1: Drill the satellite wells to the bottom of the salt layer, and then drill the first horizontal wells so that the satellite wells are connected pairwise through the first horizontal wells to form a communication channel. Step 2: Drill the central well and the second horizontal well, and make the central well connected to any one of the satellite wells through the second horizontal well. Step 3: Drill the inclined wells, and make the inclined wells extend to the open hole section at the bottom of the vertical shaft section of the satellite wells so that the inclined wells are connected to the first horizontal wells. Step 4: Inject fresh water into the satellite wells and the central well simultaneously, and dynamically adjust the brine discharge volume through the inclined wells to control the diameter of the connected cavity dissolved out by the first horizontal well and the second horizontal well within 10 - 15 m. Step 5: Conduct solution mining to form cavities based on the central well and the satellite wells. Through the feedback of ultrasonic logging, adopt the nitrogen gas anti-solution technology to control the growth of the cavities. The height difference between the cavities of the satellite wells and the central well ≤ 20 m.

5. A method for creating a cavity in a honeycomb - type salt - cavern gas storage reservoir according to claim 4, characterized in that: In Step 3, when the inclined well descends to a depth at a height from the designed top of the salt cavity, it starts to build the slope. The slope formula is: When H - x2 ≤ y ≤ H + H1, the drilling slope formula is: In the formula: x is the horizontal distance of the pipeline from the wellhead of the inclined well; y is the vertical distance of the pipeline from the wellhead of the inclined well; H is the distance from the top of the cavity to the wellhead; H1 is the distance between the designed top of the salt cavity and the bottom of the initial dissolved cavity; x1 is the distance between the wellhead of the inclined well and the wellhead of the central well, 10 ≤ x1 ≤ 15; x2 is the vertical distance between the slope building point and the designed top of the salt cavity, x2 ≥ 200; D is the designed diameter of the salt cavity; d is the horizontal distance between the end point of the inclined well and the center of the bottom of the initial dissolved cavity of the central well, 250 ≤ d ≤ 350.

6. The method for creating a cavity in a honeycomb-shaped salt cavern gas storage reservoir according to claim 4, characterized in that: In Step 1, use an acoustic signal transmitter and receiver to directionally control the first horizontal well to connect adjacent satellite wells, and retain an open hole section of 200 - 250 m.

7. A gas injection and production method for a honeycomb-shaped salt cavern gas storage reservoir according to any one of claims 1-3, characterized in that: It includes: Gas injection and brine discharge stage: Step 1: Inject natural gas into the connected cavity through the central well, and discharge brine through the inclined well. Step 2: Based on the difference in the buried depth of the cavities, preferentially inject gas into the cavity with the deepest buried depth, and then inject gas into the cavities with shallower buried depths. Step 3: During the synchronous gas injection process, adjust the gas injection rate of each cavity in real time so that the height difference of the gas-liquid interfaces between the cavities ≤ 10 m. Step 4: When terminating gas injection, ensure that the final gas-liquid interface height is not lower than the safety height threshold of the cavity with the shallowest buried depth. Gas production stage: Step 5: Conduct gas production through the central gas injection well, and selectively supplement brine through the inclined well. Step 6: Based on the difference in the buried depth of the cavities, preferentially produce gas from the cavity with the shallowest buried depth, and then produce gas from the cavities with deeper buried depths. Step 7: During the synchronous gas production process, adjust the gas production rate of each cavity in real time so that the height difference of the gas-liquid interfaces between the cavities ≤ 10 m. Step 8: When terminating gas production, ensure that the final gas-liquid interface height is not higher than the safety height threshold of the cavity with the deepest burial depth.

8. The gas injection and production method of a honeycomb-shaped salt cavern gas storage reservoir according to claim 7, characterized in that: In Step 2, based on the difference in the number of communication channels between cavities, inject gas into the cavity with more communication channels first, and then inject gas into the cavity with fewer communication channels.

9. The gas injection and production method of a honeycomb - type salt - cavern gas storage reservoir according to claim 7, characterized in that: In Step 6, based on the difference in the number of communication channels between cavities, extract gas from the cavity with fewer communication channels first, and then extract gas from the cavity with more communication channels.

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