CN114961659A - Gas storage injection and production well injection and production device and induced-flow drainage method - Google Patents
Gas storage injection and production well injection and production device and induced-flow drainage method Download PDFInfo
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 443
- 238000002347 injection Methods 0.000 title claims abstract description 378
- 239000007924 injection Substances 0.000 title claims abstract description 378
- 238000000034 method Methods 0.000 title claims abstract description 42
- 238000003860 storage Methods 0.000 title claims abstract description 35
- 230000001105 regulatory effect Effects 0.000 claims abstract description 30
- 239000007921 spray Substances 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims description 114
- 230000008569 process Effects 0.000 claims description 23
- 238000007599 discharging Methods 0.000 claims description 9
- 238000000926 separation method Methods 0.000 claims description 7
- 238000012544 monitoring process Methods 0.000 claims description 5
- 238000013022 venting Methods 0.000 claims description 3
- 230000002457 bidirectional effect Effects 0.000 claims description 2
- 230000000087 stabilizing effect Effects 0.000 claims description 2
- 235000015111 chews Nutrition 0.000 claims 1
- 239000007789 gas Substances 0.000 description 586
- 238000009825 accumulation Methods 0.000 description 27
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 24
- 239000003345 natural gas Substances 0.000 description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 238000012360 testing method Methods 0.000 description 7
- 238000010992 reflux Methods 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000003912 environmental pollution Methods 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
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- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
- E21B43/122—Gas lift
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
- E21B43/13—Lifting well fluids specially adapted to dewatering of wells of gas producing reservoirs, e.g. methane producing coal beds
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Abstract
The invention belongs to the technical field of gas storage reservoir injection and production gas well drainage, and particularly relates to a gas storage reservoir injection and production well injection and production device and a induced-flow drainage method, wherein the device comprises a gas injection manifold, a gas production manifold and a plurality of injection and production pipelines; the gas injection manifold is connected with gas injection supercharging equipment and used for receiving gas injected by the gas injection supercharging equipment; one end of each injection and production pipeline is connected with the gas injection manifold through a corresponding first gas injection pipeline and is also connected with the gas production manifold through a corresponding first gas production pipeline, and the other end of each injection and production pipeline is connected with a corresponding gas production tree through a corresponding second gas injection pipeline and a corresponding second gas production pipeline which are arranged in parallel; the first gas production pipeline and the second gas production pipeline are both provided with a pressure regulating device and a gas production control valve; the first gas injection pipeline and the second gas injection pipeline are both provided with gas injection control valves, and the gas injection control valves are two-way valves. The invention can safely carry out injection, gas production and induced spray drainage operation, has simple equipment, low cost and high efficiency and safety during the induced spray drainage operation.
Description
Technical Field
The invention belongs to the technical field of drainage of gas storage injection and production wells, and particularly relates to a gas storage injection and production well injection and production device and a induced flow drainage method.
Background
In the multi-cycle injection and production operation process of the depleted sandstone type gas storage, because the working gas quantity does not meet the design requirement, well position encryption is required, and the problem of reverse discharge of well liquid in an oil pipe exists when an injection and production well is newly drilled or after the injection and production gas well is repaired due to faults. In the initial stage of building the gas reservoir, because the formation pressure is low, the gas compressor is injected into the reservoir with the well killing fluid in the injection and production station in the accessible, and after the gas reservoir normally operates, because the formation pressure is higher, the compressor outlet pressure can't satisfy the reservoir requirement of extruding the liquid column in the pit shaft into the reservoir, and presses out the pressure for a long time and injects the gas increase on-the-spot operation risk.
At present, gas field gas well induced flow has two modes, firstly, utilize coiled tubing to carry out nitrogen gas lift induced flow, this kind of method construction safety, but the construction cost is high, the work progress is complicated, need nitrogen making equipment and coiled tubing operation equipment, secondly, utilize the well testing steel wire instrument induced flow, inject the annular space with the interior liquid discharge of tubular column of nitrogen gas through injecting in the oil pipe, and realize induced flow purpose through releasing gaseous in the tubular column on ground, but the work progress is complicated, cause well testing instrument misoperation or engineering accident easily, and the gas storage gas well is for guaranteeing safety, the annular space all sets up the packer, can't pass through annular space flowing back.
For example, chinese patent application publication No. CN113356805A discloses an inter-well sloshing type gas lift induced-flow device, which comprises: the system comprises a kill manifold arranged outside a shaft and a plurality of control devices connected with the kill manifold; wherein, the first way in the number way controlling means: is provided with: the cross-shaped pipelines are respectively provided with a well-facing service oil pipe control valve; and wherein, the control valve of the oil pipe of the well-facing service at one end is also connected with the oil pressure gauge of the fault well through a pipeline; the oil pipe control valve of the adjacent well service at the other end is also connected with the stepped pipeline through a pipeline; the second path in the digital control device: is provided with: the system comprises a plurality of fault well service oil pipe control valves arranged on a pipeline, wherein the pipeline is in a cross shape, and each cross-shaped pipeline is respectively provided with a fault well service oil pipe control valve, a fault well production control valve and a fault well production main valve; the control valve of the service oil pipe of the fault well is connected with the oil pressure gauge of the fault well through a pipeline; the production control valve of the fault well is respectively connected with a choke of the fault well and a closed discharge tank through pipelines, and the closed discharge tank is connected with a torch head; and the main valve of the fault well at the other end is also connected with the stepped pipeline through a pipeline. The patent application with publication number CN113356805A only discloses the structure of induced-flow liquid discharging operation, but does not disclose the structure of gas production operation, and cannot solve the problems of how to inject and produce gas and induced-flow liquid discharging. How to accomplish injection, production operation and can carry out induced flow liquid discharging to the injection and production well, reduce operating cost and operation risk becomes the problem that the scene needs to be solved urgently.
Disclosure of Invention
The invention aims to provide the injection and production device of the gas storage reservoir injection and production well, which has the advantages of simple structure and high safety and can realize injection, production and induced flow simultaneously, and also provides the induced flow liquid discharging method which is realized on the basis of the injection and production device of the gas storage reservoir injection and production well, and has the advantages of high efficiency, resource saving and high safety.
In order to solve the technical problems, the technical scheme provided by the invention and the corresponding beneficial effects of the technical scheme are as follows:
the invention provides an injection-production well injection-production device of a gas storage, which comprises a gas injection manifold, a gas injection pressurizing device and a gas storage tank, wherein the gas injection manifold is connected with the gas injection pressurizing device and used for receiving gas injected by the gas injection pressurizing device; the method is characterized in that: the device also comprises a gas production manifold and a plurality of injection and production pipelines;
one end of each injection and production pipeline is connected with the gas injection manifold through a corresponding first gas injection pipeline and is also connected with the gas production manifold through a corresponding first gas production pipeline, and the other end of each injection and production pipeline is connected with a corresponding gas production tree through a corresponding second gas injection pipeline and a corresponding second gas production pipeline which are arranged in parallel; the gas injection supercharging equipment comprises multi-stage supercharging equipment driven by a driving device;
the first gas production pipeline and the second gas production pipeline are both provided with a pressure regulating device and a gas production control valve;
the first gas injection pipeline and the second gas injection pipeline are both provided with gas injection control valves, and the gas injection control valves are two-way valves.
The beneficial effects of the above technical scheme are:
the device of the invention separates the gas injection and gas production pipelines. In the gas injection period, gas can be injected by using gas injection supercharging equipment, and a gas to be injected flows to a gas production tree through a first gas injection pipeline, a gas injection production pipeline and a second gas injection pipeline, so that the gas injection process is realized. In the gas production period, gas produced in the gas production tree can be introduced into the gas production manifold through the second gas production pipeline, the injection production pipeline and the first gas production pipeline, the gas production process is realized, pressure regulating devices are arranged on the second gas production pipeline and the first gas production pipeline during gas production, and the safety and reliability of the gas production process are ensured through two-stage pressure regulation. Meanwhile, in the gas storage stopping stage or gas production stage, a high-pressure gas source of the adjacent well can be used as a gas injection gas source through a gas injection manifold communicated with a second gas injection pipeline of the adjacent well, then the gas injection manifold is introduced into the adjacent well through a first gas injection pipeline, the gas source enters a liquid accumulation well injection and production pipeline through a gas injection control valve on the first gas injection pipeline of the liquid accumulation well through the gas injection manifold, and finally the high-pressure gas source is injected into a liquid accumulation well shaft through the first gas injection pipeline of the liquid accumulation well, so that the induced flow and drainage functions are realized. The device introduces the high-pressure gas source of the adjacent well into the gas injection manifold through the second gas injection pipeline and the first gas injection pipeline, and the pressure of the high-pressure natural gas of the gas reservoir is ensured without passing through the pressure regulating devices of the second gas production pipeline and the first gas production pipeline.
The invention has multiple functions, and can realize the gas injection and production operation process; and secondly, the gas lift induced-flow operation can be carried out, so that the capital cost is effectively saved. Thirdly, the gas lift induced flow operation is carried out by using the method without adopting other resources such as nitrogen and the like, so that the safety is effectively improved. In a word, the equipment has simple process and small occupied space in the station, and the operation and the maintenance are simple and convenient when the equipment is used for injecting, gas production and induced spraying and liquid drainage operation, the operation preparation time and the number of operating personnel are greatly reduced, and the practicability is very strong.
Further, each pressure regulating device arranged on the second gas production line comprises a gas nozzle, and the gas nozzle is used for reducing high-pressure gas in the gas reservoir to a safe range.
Further, in order to ensure the safety in the station, the pressure regulating device arranged on the first gas production pipeline is a labyrinth pressure regulating valve and is used for stabilizing the pressure in the injection and production station in a safety range.
Furthermore, in order to remotely turn off a ground safety valve arranged on a gas production tree in an emergency, a ground safety valve is arranged on a gas production tree pipeline at one end of each gas production tree, which is connected with the corresponding injection production pipeline; the pressure regulating device arranged on each second gas production pipe line further comprises a low-pressure limiting valve; the device also comprises a wellhead control cabinet, and the ground safety valve and the low-pressure limiting valve are both connected with the control cabinet.
Furthermore, the device also comprises an inverse metering pipeline, one end of the inverse metering pipeline is connected to each first gas production pipeline through a corresponding inverse metering control valve, and the other end of the inverse metering pipeline is connected to an inlet of the metering separator; the metering separator is provided with a liquid outlet which is connected with a liquid discharge pipeline.
The beneficial effects of the above technical scheme are:
the injection and production pipeline is respectively communicated with the gas injection manifold, the gas production manifold and the inverse metering pipeline in the injection and production station, the well site process is communicated with the flow in the injection and production station, the switching between the injection and production gas flow and the inverse metering flow is realized, the process flow in the station is adopted, the equipment is simple, the installation is convenient and fast, and the capital cost is effectively saved.
Furthermore, the metering separator is also provided with a first exhaust port and/or a second exhaust port; the first exhaust port is connected with a venting torch; the second exhaust port is connected with downstream gas production process equipment so that separated gas enters a downstream gas production process; the metering separator is also provided with a liquid level meter for monitoring the liquid level in the metering separator.
The beneficial effects of the above technical scheme are:
when the gas lift induced-flow operation is carried out by using the method, natural gas is combusted through the emptying torch after shaft induced-flow, or enters the gas injection compressor unit through the gas inlet pipeline of the gas injection compressor unit to be pressurized to enter a downstream gas production process in the gas injection production process, so that the problem of environmental pollution is reduced. In addition, the metering separator is provided with the liquid level meter, so that the metering separator can be effectively prevented from operating at a super liquid level.
Further, pressure transmitters are arranged on the injection and production pipeline, the gas production manifold, the gas injection manifold, the first gas production pipeline and the gas tree; and temperature transmitters are arranged on the injection production pipeline, the first gas production pipeline and the gas production tree.
Furthermore, an emergency cut-off track type ball valve and a single well flowmeter are also arranged on the injection and production pipeline; a double-acting intercepting and stopping valve is further arranged on the first gas production pipe line; the gas injection supercharging equipment is provided with an overpressure backflow pneumatic control valve; the device also comprises a vent pipeline, wherein the vent pipeline is connected with the gas injection manifold, and an emergency vent valve is arranged on the vent pipeline.
Further, in order to realize automatic control of data acquisition and production process, the temperature transmitter, the pressure transmitter, the overpressure reflux pneumatic control valve, the emergency cut-off rail type ball valve and the emergency vent valve are respectively connected to the SCADA system and the ESD system.
The invention relates to a induced flow drainage method realized on the basis of an injection and production device of an injection and production well of a gas storage reservoir, which comprises the following steps of:
step 1:
101) opening a gas production control valve and a well-regulated pressure regulating device which are arranged on a second gas production pipeline on a normal gas well pipeline, introducing a high-pressure gas source of a gas production tree of a normal gas well into a corresponding injection production pipeline through the second gas production pipeline on the normal gas well pipeline, closing the gas production control valve on a corresponding first gas production pipeline, opening a bidirectional gas injection control valve on a corresponding first gas injection pipeline, and introducing the high-pressure gas source into a gas injection manifold through the corresponding first gas injection pipeline;
102) opening a two-way gas injection control valve on a first gas injection pipeline on the accumulated liquid gas well pipeline, reintroducing a high-pressure gas source obtained in a gas injection manifold into the corresponding first gas injection pipeline, opening a gas injection control valve on a corresponding second gas injection pipeline, entering the corresponding second gas injection pipeline through the corresponding gas injection and production pipeline, and introducing the accumulated liquid gas well through the corresponding second gas injection pipeline;
step 2: well closing;
and 3, step 3:
301) closing a two-way gas injection control valve on a first gas injection pipeline on a normal gas well pipeline, and closing the two-way gas injection control valve on the first gas injection pipeline on a liquid-accumulating gas well pipeline so as to conduct a gas production induced flow of the liquid-accumulating gas well;
302) the accumulated liquid enters the injection and production station through a second gas production pipeline on the accumulated liquid gas well pipeline and then through the corresponding injection and production pipeline so as to be reintroduced into enterprise separation equipment for gas-liquid separation;
and 4, step 4: and (3) carrying out the processes from the step 1 to the step 3 so as to completely discharge the accumulated liquid.
The beneficial effects of the above technical scheme are:
according to the induced-flow liquid drainage method, high-pressure gas of an adjacent well is introduced into the liquid accumulation well through the injection and production pipeline, the first gas injection pipeline and the gas injection manifold, on one hand, the use of a plurality of devices such as a coiled tubing and a control device is reduced, so that the use of a well site and the peripheral area of the well site is reduced, a sufficient space is provided for gas injection and production operation and production of the well site, the gas injection and production efficiency is improved, and the liquid drainage operation time in a shaft is saved. In addition, the gas lift induced flow operation is carried out by using the method without adopting other resources such as nitrogen and the like, so that the safety is effectively improved.
Further, before the step 1, emergency shutdown system debugging is further included to ensure that the normal well shut-in function and the central control real-time monitoring function under emergency are realized, and the functions of compressor shutdown, compressor overpressure backflow and injection and production gas collecting pipe emptying are realized under overpressure condition.
Drawings
FIG. 1 is a schematic diagram of the in-station process flow of an injection-production station of an injection-production well injection-production device of a gas storage reservoir according to the present invention;
FIG. 2 is a schematic view of the well site process flow of the gas storage injection-production well injection-production device of the present invention.
In the figure: 1. a gas injection compressor set; 1-1, an air inlet pipeline of the gas injection compressor set; 1-2, an exhaust pipeline of the gas injection compressor set; 1-3. an overpressure reflux pneumatic control valve of a gas injection compressor set; 1-4. an overpressure return pipeline of the gas injection compressor set; 1-5. a driving device; 1-6, a first-stage supercharger; 1-7, a two-stage supercharger; 2-gas injection manifold; 3-gas production collecting pipe; 2-1. a pressure transmitter; 3-1. a pressure transmitter; 2-2, an emergency release valve; 3-2, an emergency emptying valve; 2-3, emptying pipeline; 3-3, emptying pipeline; 4. single well injection and production pipelines; 5. single well injection and production pipelines; 4-1, cutting off the track ball valve in emergency; 5-1, cutting off the track ball valve in emergency; 4-2. a temperature transmitter; 5-2. a temperature transmitter; 4-3. a pressure transmitter; 5-3. a pressure transmitter; 4-4. single well flow meter; 5-4, single well flow meter; 4-5, a gas production plug valve; 5-5, a gas production plug valve; 4-6, labyrinth pressure regulating valve; 5-6, labyrinth pressure regulating valve; 4-7. a pressure transmitter; 5-7. a pressure transmitter; 4-8, a double-acting intercepting stop valve; 5-8, a double-acting intercepting stop valve; 4-9 gas injection plug valves; 5-9. a gas injection plug valve; 4-10, gas production plug valve; 5-10, a gas production plug valve; 4-11. single well inverted metering plug valve; 5-11, a single-well inverted metering plug valve; 6. a metering separator; 6-1, a liquid level meter; 6-2, a sewage discharge pipeline; 6-3, a gas flowmeter; 6-4, a plug valve; 6-7, a plug valve; 7. discharging a torch; 11. a single well is inverted to a metering pipeline; 8. gas production trees; 9. gas production trees; 8-1, producing a main valve; 8-4, producing a main valve; 8-2. a wellhead oil pressure transmitter; 9-2. a wellhead oil pressure transmitter; 8-3. a wellhead oil temperature transmitter; 9-3. a wellhead oil temperature transmitter; 8-5, a gas production tree ground safety valve; 9-5, a gas production tree ground safety valve; 8-8, producing a valve on the lateral wing of the gas production tree; 9-8, producing a valve on the lateral wing of the gas production tree; 4-a. a second single-well gas injection line; 5-a. a second single-well gas injection line; 4-b. a second single well gas production line; 5-b. a second single well gas production line; 4-C. air nozzle; 5-C, air nozzle; 4-d. a low pressure limiting valve; 5-D, a low pressure limiting valve; 4-e. a temperature transmitter; 5-E. a temperature transmitter; 10. a wellhead control cabinet; 10-1. hydraulic line.
Detailed Description
An embodiment of an injection and production device of an injection and production well of a gas storage comprises:
the invention relates to an injection and production device for an injection and production well of a gas storage reservoir, which is used for carrying out induced flow drainage and gas injection and production on a liquid accumulation well. The device includes: a gas injection manifold, a gas production manifold and a plurality of injection and production pipelines; the gas injection manifold is connected with gas injection supercharging equipment and used for receiving gas injected by the gas injection supercharging equipment; one end of each injection and production pipeline is connected with the gas injection manifold through a corresponding first gas injection pipeline and is also connected with the gas production manifold through a corresponding first gas production pipeline, and the other end of each injection and production pipeline is connected with a corresponding gas production tree through a corresponding second gas injection pipeline and a corresponding second gas production pipeline which are arranged in parallel; the first gas production pipeline and the second gas production pipeline are both provided with a pressure regulating device and a gas production control valve; the first gas injection pipeline and the second gas injection pipeline are both provided with gas injection control valves, and the gas injection control valves are two-way valves.
In this embodiment, as shown in fig. 1 and fig. 2, preferably, the gas injection control valves disposed on the first gas injection pipeline and the second gas injection pipeline are gas injection stopcock valves, and the gas production control valves disposed on the first gas production pipeline and the second gas production pipeline are gas production stopcock valves, where the gas injection stopcock valves and the gas production stopcock valves are not limited to stopcocks in other possible embodiments. The injection and production pipeline is a single-well injection and production pipeline, the first gas injection pipeline and the second gas injection pipeline are single-well gas injection pipelines and are correspondingly and respectively recorded as a first single-well gas injection pipeline and a second single-well gas injection pipeline, and the first gas production pipeline and the second gas production pipeline are single-well gas production pipelines and are correspondingly and respectively recorded as a first single-well gas production pipeline and a second single-well gas production pipeline. In this embodiment, two injection and production pipelines, such as a single-well injection and production pipeline 4 and a single-well injection and production pipeline 5 in fig. 1, are used to connect gas production trees, such as a gas production tree 8 and a gas production tree 9 in fig. 2, respectively, and the number of the injection and production pipelines and the number of the gas production trees connected correspondingly are not limited in other feasible embodiments. The gas injection pressurizing apparatus includes a multistage pressurizing apparatus driven by a driving device 1-5. The driving device adopts a diesel engine, and preferably adopts a gas engine. The multi-stage supercharging device is a two-stage supercharging device in the embodiment, namely a first supercharger 1-6 and a second supercharger 1-7, wherein the first supercharger 1-6 and the second supercharger 1-7 are arranged through two-stage connecting shafts and driven by a gas engine, so that the first supercharger 1-6 is compressed to a set compression ratio, and the second supercharger 1-7 is compressed to a target compression ratio.
In the present embodiment, the gas injection pressurization device is preferably a gas injection compressor set 1, and is not limited to the gas injection compressor set 1 in other possible embodiments. In this embodiment, the pressure regulating device disposed on the first single-well gas production line is preferably a labyrinth pressure regulating valve. The pressure regulating device arranged on each second single-well gas production pipe line is preferably a gas nozzle and a low-pressure limiting valve.
The gas injection compressor unit 1 is communicated with a gas production tree through a gas injection manifold and a single-well injection and production pipeline. The production valve of the lateral wing of the gas production tree is connected with a second single-well gas injection pipeline and a second single-well gas production pipeline in a well site, the second single-well gas injection pipeline and the second single-well gas production pipeline are connected with a single-well gas injection and production pipeline, and the single-well gas injection and production pipeline of the well site is communicated with a gas injection manifold and a gas production manifold after entering a station of an injection and production station, so that the injection and production well and the gas injection manifold in the station are communicated to perform liquid discharge induced-flow operation.
In order to realize the liquid discharge function, the device also comprises an inverse metering pipeline, one end of the inverse metering pipeline is connected to each first single-well gas production pipeline through a corresponding inverse metering control valve, and the other end of the inverse metering pipeline is connected to an inlet of the metering separator; the inverted metering control valve is preferably an inverted metering plug valve. The metering separator is provided with a liquid outlet which is connected with a liquid discharge pipeline. In the embodiment, the metering separator is also provided with a first exhaust port and a second exhaust port; the first exhaust port is connected with a venting torch; the second exhaust port is connected with downstream gas production process equipment so that the separated gas enters a downstream gas production process. In another possible embodiment, the metering separator is also provided with a first exhaust, which is connected to a flare. In a further possible embodiment, the metering separator is further provided with a second gas outlet, which is connected to the downstream gas production process equipment, so that the separated gas enters the downstream gas production process.
In order to ensure the safety in the station, a gas nozzle 4-C (5-C) is arranged on a well site on a second single-well gas production line 4-B (5-B) connected with a single-well injection and production pipeline 4 (5) and the high-pressure gas of the gas reservoir is reduced to about 13MPa at the well site.
A first single-well gas production pipeline connected with a single-well injection and production pipeline 4 (a single-well injection and production pipeline 5) is internally provided with a labyrinth pressure regulating valve 4-6 (a labyrinth pressure regulating valve 5-6) in an injection and production station, and the pressure in the station is automatically controlled and stabilized between 6MPa and 7.6MPa through two-stage throttling, so that the requirements of safety and process parameters in the station are met.
The gas in the single-well injection and production pipeline is connected with a gas production manifold and a single-well inverted metering pipeline after pressure regulation, the single-well inverted metering pipeline is subjected to gas-liquid separation through a metering separator and measures the single-well liquid production amount, the separated gas in the metering separator is combusted through an emptying torch or enters a downstream gas production process, and the environment pollution is avoided. Furthermore, in order to ensure safety, the metering separator liquid level meter is provided with a high liquid level alarm on a central control upper computer, so that the separator is prevented from operating beyond the liquid level.
In order to deal with emergency risk avoidance, a gas production tree ground safety valve 8-5 (a gas production tree ground safety valve 9-5) arranged on a gas production tree 8 (a gas production tree 9) is connected with a wellhead control cabinet 10 through a hydraulic pipeline 10-1, and a low-pressure limiting valve 4-D (a low-pressure limiting valve 5-D) arranged on a second single-well gas production pipeline is arranged with the wellhead control cabinet in a linkage manner, so that the ground safety valve arranged on the gas production tree is remotely turned off in an emergency, and the remote transmission function of wellhead data and control room data in an injection and production station is realized.
In order to realize the automatic control of the data acquisition and production process of the device, the device also comprises data acquisition equipment which is respectively accessed to the SCADA system and the ESD system. The data acquisition equipment comprises a temperature transmitter and a pressure transmitter; the temperature transmitter is arranged on the injection and production pipeline, the first single-well gas production pipeline and the gas production tree; the pressure transmitter is arranged on the injection and production pipeline, the gas production manifold, the gas injection manifold, the first single-well gas production pipeline and the gas production tree. In order to realize triggering emergency shut-off and emptying when the pipeline is subjected to pressure-holding overpressure and gas leakage in the gas injection process, an emergency shut-off track type ball valve 4-1 (an emergency shut-off track type ball valve 5-1), a pressure transmitter 4-3 (a pressure transmitter 5-3), a pressure-regulating pressure transmitter 4-7 (a pressure transmitter 5-7) arranged on a single well gas production pipeline and an emergency emptying valve 2-2 and an emergency emptying valve 3-2 arranged on a gas injection manifold 2 are interlocked, wherein the emergency shut-off track type ball valve 4-1, the pressure transmitter 4-3 and the pressure transmitter 5-7 are arranged on the single well gas production pipeline 4 (a single well gas production pipeline 5); a pressure transmitter 2-1 arranged at the outlet end of the gas injection manifold 2 is interlocked with an overpressure reflux pneumatic control valve 1-3 (an overpressure reflux pneumatic control valve 1-4) of the gas injection compressor set; the low pressure limiting valve 4-D (low pressure limiting valve 5-D) is interlocked with the wellhead control cabinet 10. The injection and production pipeline 2 is also provided with a single-well flowmeter 4-4 (a single-well flowmeter 5-4); and a gas production plug valve 4-5 (a gas production plug valve 5-5) and a double-acting interception stop valve 4-8 (a double-acting interception stop valve 5-8) are also arranged on the first single-well gas production pipe line.
Specifically, a single-well injection and production pipeline 4 (a single-well injection and production pipeline 5) is respectively connected with a gas production tree 8 (a gas production tree 9) through a second single-well gas injection pipeline 4-A (a second single-well gas injection pipeline 5-A) and a second single-well gas production pipeline 4-B (a second single-well gas production pipeline 5-B) in a well site, the second single-well gas production pipeline 4-B (the second single-well gas production pipeline 5-B) is provided with a gas nozzle 4-C (the gas nozzle 5-C), a low-pressure limiting valve 4-D (the low-pressure limiting valve 5-D) and a temperature transmitter 4-E (the temperature transmitter 5-E), the single-well injection and production pipeline is respectively communicated with a gas injection pipe 2, a gas production manifold 3 and a single-well inverted metering pipeline 11 in an injection and production station, the process is communicated with the flow in the injection and production station, so that the switching between the single-well injection and gas production flows is realized, and the installation of the pipeline in the station is saved.
Specifically, a pressure transmitter 2-1 and an emergency emptying valve 2-2 are arranged on the gas injection manifold 2, a gas production manifold 3 is provided with a pressure transmitter 3-1 and an emergency emptying valve 3-2, the emergency emptying valve 2-2 (the emergency emptying valve 3-2) is connected with an emptying pipeline 2-3 (the emptying pipeline 3-3), a single-well injection and production pipeline 4 (a single-well injection and production pipeline 5) is respectively connected with the gas injection manifold 2 and the gas production manifold 3 in the injection and production station, and a single-well injection and production pipeline in the injection and production station is provided with an emergency cut-off track type ball valve 4-1 (the emergency cut-off track type ball valve 5-1), a pressure transmitter 4-3 (the pressure transmitter 5-3), a pressure transmitter 4-7 (the pressure transmitter 5-7) and a temperature transmitter 4-2 (the temperature transmitter 5-2), The system comprises a single well flowmeter 4-4 (a single well flowmeter 5-4), a gas production plug valve 4-5 (a gas production plug valve 5-5), a labyrinth pressure regulating valve 4-6 (a labyrinth pressure regulating valve 5-6) and a double-acting interception cut-off valve 4-8 (a double-acting interception cut-off valve 5-8). The field instruments such as the temperature transmitter and the pressure transmitter have a remote transmission function, can be monitored in real time in a central control mode, and can find out abnormal working conditions in the field in time.
The embodiment of the induced flow liquid discharging method based on the gas storage injection and production well injection and production device comprises the following steps:
the following describes a process of normal gas injection and production by using the gas storage injection and production well injection and production device of the invention.
In order to facilitate understanding of the technical solution, the normal gas injection process and the normal gas production process are described below by using two injection and production pipelines.
Normal gas injection process: as shown in figure 1, gas is pressurized by a gas injection compressor unit gas inlet pipeline 1-1 through a gas injection compressor unit 1, then enters a gas injection manifold 2 through a gas injection compressor unit gas exhaust pipeline 1-2, high-pressure gas in the gas injection manifold correspondingly enters a single-well injection and production pipeline 4 (a single-well injection and production pipeline 5) through control of a gas injection plug valve 4-9 (a gas injection plug valve 5-9), and the single-well injection and production pipeline 4 (the single-well injection and production pipeline 5) enters a well field in figure 2 and then is communicated with a gas production tree 8 (a gas production tree 9) through a second single-well injection and production pipeline 4-A (a second single-well injection and production pipeline 5-A) to complete gas injection.
The normal gas production process comprises the following steps: as shown in figure 2, after natural gas in a reservoir is produced through a gas production tree 8 (a gas production tree 9), the natural gas enters a single-well injection and production pipeline 4 (a single-well injection and production pipeline 5) through a second single-well gas production pipeline 4-B (a second single-well gas production pipeline 5-B), then enters an injection and production station in figure 1 through the single-well injection and production pipeline, after pressure regulation is controlled through a gas production plug valve 4-5 (a gas production plug valve 5-5) and a labyrinth pressure regulating valve 4-6 (a labyrinth pressure regulating valve 5-6) in the injection and production station in sequence, the natural gas enters a gas production collecting pipe 3 through the control of a gas production plug valve 4-10 (a gas production plug valve 5-10) or enters a metering separator 6 through a single-well inverted metering plug valve 4-11 and a single-well inverted metering plug valve 5-11, and metering of gas production liquid of a single well can be realized through the metering separator.
The following describes the induced-flow operation of the liquid-accumulating well by using the injection-production device of the gas storage injection-production well of the present invention.
More importantly, the invention can also be used for carrying out induced flow drainage operation of the injection and production wells of the gas storage. The high-pressure gas source system comprises two systems, wherein gas can be injected by the gas injection compressor unit 1 in a gas injection period, and high-pressure natural gas in a gas reservoir can be introduced into the liquid collecting well through a single-well injection and production pipeline and a gas injection manifold by using an adjacent well in a gas stopping period or a gas production period. In the gas injection production process, natural gas enters the gas injection compressor unit 1 through a gas inlet pipeline of the gas injection compressor unit 1 for pressurization, and after pressurization, the natural gas enters a gas injection manifold through a compressor outlet pipeline. In the gas storage stopping stage or gas production stage, a high-pressure gas source of an adjacent well can be introduced into a gas injection manifold as a gas injection gas source through the gas injection manifold, the gas injection manifold controls a single-well injection and production pipeline through a gas injection plug valve, an in-station flow of an injection and production station is communicated with a well site gas production tree through the single-well injection and production pipeline, and the high-pressure gas source is injected into a liquid accumulation well shaft through the single-well injection and production pipeline.
The operation steps of the liquid accumulation well induced flow operation by using the method are further described in detail below, wherein the gas production tree 8 is set as a gas production tree of a shaft liquid accumulation gas well, which is referred to as a liquid accumulation gas well for short, and the gas production tree 9 is set as a gas production tree of a normal gas well, which is referred to as a normal gas well for short: a high-pressure air source system: in the gas injection period, gas can be injected by a compressor, the gas is pressurized by the gas injection compressor unit 1 through the gas inlet pipeline 1-1 of the gas injection compressor unit, and then enters the gas injection manifold 2 through the gas exhaust pipeline 1-2 of the gas injection compressor unit. In the gas storage stopping stage or gas production stage, a high-pressure gas source of a normal gas well gas production tree can be used as a gas injection gas source and introduced into a gas injection manifold through a gas injection manifold 2. The specific operation is as follows: and opening a gas production tree ground safety valve 9-5 and a gas production tree flank production valve 9-8 of a normal gas well gas production tree, and a second single-well gas injection pipeline 5-A and a second single-well gas injection pipeline 5 which are connected with a high-pressure gas source in the normal gas well gas production tree through the normal gas well, then entering an injection and production station, and opening an emergency cut-off rail type ball valve 5-1 and a gas injection plug valve 5-9 on a first single-well gas injection pipeline, so that the high-pressure gas source in the normal gas well gas production tree can be introduced into a gas injection manifold 2.
The high-pressure gas source in the gas injection manifold 2 can be introduced into the gas production tree of the liquid-liquid gas well of the shaft as a induced spraying gas source through the gas injection process of the liquid-liquid gas well gas production tree of the shaft. The specific operation is as follows: and opening a gas injection plug valve 4-9 on a first single-well gas injection pipeline connected with the gas production tree of the liquid accumulation gas well, controlling gas to enter the single-well gas injection and production pipeline 4, and introducing gas accumulation pressure natural gas into the gas production tree of the liquid accumulation gas well through a second single-well gas injection pipeline 4-A at a well site. In another aspect, the invention also includes a drainage apparatus, the following describes the drainage operation:
liquid drainage: and (4) discharging liquid by using gas production process equipment of the injection and production well. Gas-liquid mixture produced by a gas production tree of the liquid-liquid gas well of the shaft enters a single-well gas injection pipeline 4 through a second single-well gas production pipeline 4-B, and the single-well gas injection pipeline 4 enters the gas production station and then is controlled to enter a gas production collecting pipe 3 through a gas production plug valve 4-10 on the first single-well gas production pipeline or is controlled to enter a single-well gas production reverse metering pipeline 11 through a single-well reverse metering plug valve 4-11 connected with the gas production plug valve 4-10 in parallel. Gas-liquid mixture produced in the well enters a metering separator 6 through a single-well inverted metering pipeline 11, a liquid level meter 6-1 is arranged outside the metering separator, liquid separated by the metering separator is directly discharged outside through a sewage discharge pipeline 6-2, and the separated gas can enter a discharge torch 7 to be combusted under the control of a plug valve 6-7; or the gas is metered by a gas flowmeter 6-3 and then is controlled to enter a downstream gas production process through a plug valve 6-4, so that the environmental pollution is avoided.
In order to prevent the pressure build-up of the injection and production station process system, the measure needs to test the normal operation of the ESD system before implementation, and the gas production tree 8 is set as a gas production tree of a wellbore liquid-storing gas well, which is referred to as a liquid-storing gas well for short, and the gas production tree 9 is set as a gas production tree of a normal gas well, which is referred to as a normal gas well for short.
I, debugging of an emergency shutdown system.
1) Debugging a wellhead control cabinet 10, checking the gas production tree of the liquid gas well, the underground of the gas production tree of the normal gas well and each corresponding gas production tree ground safety valve, namely the gas production tree ground safety valve 8-5 and the gas production tree ground safety valve 9-5 in the figure 2, after the wellhead control cabinet is opened, performing remote turn-off test on the ground safety valve and the underground safety valve to ensure normal well shut-off under emergency;
2) the method comprises the steps of checking data transmission conditions of a well head oil pressure transmitter 8-2, a well head oil temperature transmitter 8-3, a well field low pressure limiting valve 4-D, a temperature transmitter 4-E, a single well injection and production pipeline pressure transmitter 4-3, a pressure transmitter 4-7, a temperature transmitter 4-2 and the like connected with a liquid accumulation gas well, checking data transmission conditions of a well head oil pressure transmitter 9-2, a well head oil temperature transmitter 9-3, a well field low pressure limiting valve 5-D, a temperature transmitter 5-E, a single well injection and production pipeline pressure transmitter 5-3, a pressure transmitter 5-7, a temperature transmitter 5-2 and the like connected with a normal gas well, and ensuring real-time monitoring of central control;
3) the functions of an overpressure reflux control valve 1-3 of a gas injection compressor set, an emergency cut-off track type ball valve 4-1 on a single-well injection and production pipeline 4 connected with a liquid-accumulated gas well and an emergency cut-off track type ball valve 5-1 connected with a normal gas well are tested in a linkage mode with an emergency emptying valve 2-2 and an emergency emptying valve 3-2 on an injection and production manifold, and therefore the compressor is guaranteed to be stopped under the overpressure condition, and the compressor is guaranteed to perform overpressure reflux and the injection and production manifold is emptied.
II, induced spray and liquid discharge.
If gas is injected through a compressor, a gas injection flow is conducted, a gas injection compressor unit 1 is started, and a gas injection manifold 2 is introduced through a gas exhaust pipeline 1-2 of the gas injection compressor unit; if the total station is in the gas stop period, gas injection is carried out through the gas production tree of the normal gas well, a gas production tree flank production valve 9-8 and a ground second single-well gas injection pipeline 5-A of the gas production tree of the normal gas well are opened, a gas injection plug valve 5-9 on the single-well gas injection pipeline 5 is kept in an open state, a gas production plug valve 5-5, a labyrinth pressure regulating valve 5-6 and a double-acting interception stop valve 5-8 are kept in a closed state in the gas injection and production station, and a high-pressure gas source is introduced into the gas injection manifold 2 through the first gas injection and production pipeline. And then opening the gas injection flow of the gas production tree of the liquid accumulation gas well, opening a gas injection plug valve 4-9 on a first single-well gas injection pipeline connected with the liquid accumulation gas well in an opening state from a high-pressure end to a low-pressure end, pouring high-pressure natural gas in the gas injection manifold 2 into a well site through a single-well injection and production pipeline 4-A, conducting the gas production tree of the liquid accumulation gas well and a second single-well gas injection pipeline 4-A, sequentially conducting a gas production tree flank production wing valve 8-8 and a gas production tree ground safety valve 8-5 of the liquid accumulation gas well, then opening a production main valve 8-1 and a production main valve 8-4 connected with the liquid accumulation gas well, and introducing the high-pressure gas into the oil production tree of the liquid accumulation gas well.
And soaking the well, keeping the flow in the first part unchanged, keeping the soaking time for two hours, extruding the liquid column in the shaft into the reservoir by increasing the pressure of a wellhead oil pressure transmitter 8-2 connected with the liquid accumulation gas well, and simultaneously mixing gas and liquid on the upper part of the liquid column in the shaft.
And thirdly, closing a gas injection plug valve 5-9 on a first single-well gas injection pipeline communicated with a normal gas well gas production tree and a gas injection plug valve 4-9 on a first single-well gas injection pipeline communicated with a liquid accumulation gas well gas production tree, conducting a liquid accumulation gas well gas production induced flow, enabling a liquid drainage system to enter an injection and production station through a gas production tree flank production wing valve 8-8 and a gas production tree ground safety valve 8-5 of the liquid accumulation gas well, through a well site second single-well gas production pipeline 4-B and through a single-well injection and production pipeline 4, enabling gas to enter a single-well inverted metering pipeline 11 through a single-well inverted metering plug valve 4-11, performing gas-liquid separation through a metering separator 6, and controlling the gas to enter an emptying torch 7 through the plug valves 6-7 or controlling the gas to enter a downstream gas production flow through the plug valves 6-4. Gas and liquid in a shaft of the liquid accumulation well are moved upwards, and gas in a reservoir and the lower part of the reservoir is moved upwards and invaded into the liquid on the upper part of the shaft to form a gas-liquid mixed flow state.
And fourthly, guiding the accumulated liquid gas flow into a metering separator 6, keeping a plug valve 6-7 connected with an emptying torch 7 normally open, carrying out gas-liquid separation on the accumulated liquid discharged from the shaft, discharging the well killing liquid through a sewage discharge pipeline, and burning the gas through the emptying torch 7.
Fifthly, the process is repeated, so that the gas-liquid two-phase fluid column is enlarged, the emptying plug valves 6-7 can be closed after the accumulated liquid discharge amount is large and the gas production and liquid drainage are normal, the gas in the metering separator 6 is introduced into the downstream gas production process, and the gas waste is avoided.
And sixthly, after the liquid column is drained, starting reservoir natural gas to enter a shaft for induced flow, and performing self-flow and production recovery.
The gas lift induced-flow operation which can be carried out by the invention fully utilizes the process flow structure in the gas storage station, the gas injection compressor can be used for injecting gas in the gas injection period, and the gas reservoir pressure natural gas can be led into the liquid accumulation well through the gas injection manifold by using the adjacent well in the gas stop period or the gas production period, thereby realizing the cross operation of single-well induced-flow liquid discharge operation and gas injection and production of other injection and production wells of the gas storage; the high-pressure gas is introduced into the liquid accumulation well through a single well pipeline and a gas injection manifold by utilizing the adjacent well high-pressure gas or the gas injection compressor unit 1, on one hand, the use of a plurality of devices such as a coiled tubing, a control device and the like is reduced, so that the use of a well site and the peripheral area of the well site is reduced, a sufficient space is provided for the gas injection and production operation production of the well site, the gas injection and production efficiency is improved, the liquid discharge operation time in a shaft is saved, the gas lift induced flow operation process is simplified, the operation cost is reduced, and the resource is saved; on the other hand, the gas discharged from the shaft can be burned by the flare or enter the downstream gas production process after passing through the separator, so that the gas waste and the environmental pollution are avoided, and the purposes of cost reduction and efficiency improvement are realized on the production management.
The following description is in terms of field examples.
A certain well, 10:45 well opening for injection test in 12 months, 7 days, 11:45 well closing, 16:05 well gas production, 18:05 gas production and gas injection, 21: gas production at 00 r, 0 at 8 days: 20 into gas injection, 3: 00 into gas production, 3: 40 into gas injection, 6: 30 is converted into gas production, after four times of induced flow liquid drainage, the metering separator discharges about 3 square of well killing liquid, the rest well killing liquid is pressed into the stratum, and a 10:15 certain well is normally injected with gas.
The pressure of the wellhead is rapidly reduced to 0 after being released through a production valve pressure gauge of a gas production tree before test injection, the pressure is continuously increased to 20.89MPa in the process of wellhead gas injection after the first gas injection and shut-in, the temperature is increased to 11 ℃, the pressure of the wellhead is gradually increased after the lowest pressure of the wellhead is reduced to 8.9MPa in the first gas production stage, the pressure is stabilized at 17MPa, the temperature is increased to 18.5 ℃, less liquid is produced, and the gas production of the stratum is proved to be gradual. After the second gas injection, the temperature is about 17 ℃, the pressure is increased to 20.89MPa, the pressure drop amplitude is small after the gas injection is finished, the pressure is kept stable after the pressure is reduced to 20MPa, no continuous descending trend is seen, and the temperature of the well head is stabilized at about 18 ℃, so that the pressure building nearby a well near the well zone is proved, the temperature change of the well head oil is mainly influenced by the weather change and has the same change trend with other gas injection wells integrally. The oil pressure and the oil temperature are not changed greatly after the third injection-production induced-flow liquid drainage, which proves that the residual liquid in the oil pipe is less, most of the residual liquid is squeezed into the stratum, and the communication between the periphery of the well and the deep part of the reservoir is not smooth, so that the oil pressure is not reduced obviously. After the fourth gas production, the pressure is reduced to 17MPa and then the stability is kept, the liquid in the near well zone is squeezed into the deep part of the reservoir, and the connectivity between the stratum and the shaft is recovered. 10:15 after formal gas injection, the temperature is gradually increased to about 30 ℃. The oil pressure and the oil temperature of a well mouth of a certain well have a variation trend.
And after four times of injection, production and drainage conversion are carried out on a certain well, the wellhead pressure is 20.87MPa for 12 months and 8 days, the wellhead temperature is 36 ℃, the instantaneous gas quantity of a single-well flowmeter is 9641 square/hour, and the production test injection of the certain well is smoothly finished.
Therefore, the gas injection and gas production operation and the gas lift induced flow operation which can be carried out by using the invention have the advantages of simple equipment and process, small occupied space in a station, simple and convenient operation and simple and convenient maintenance during the gas injection and gas production operation and the induced flow liquid discharge operation, greatly reduce the operation preparation time and the number of operating personnel and have strong practicability.
Claims (10)
1. An injection and production device of an injection and production well of a gas storage comprises a gas injection manifold, wherein the gas injection manifold is connected with gas injection supercharging equipment and used for receiving gas injected by the gas injection supercharging equipment; the method is characterized in that: the device also comprises a gas production manifold and a plurality of injection and production pipelines;
one end of each injection and production pipeline is connected with the gas injection manifold through a corresponding first gas injection pipeline and is also connected with the gas production manifold through a corresponding first gas production pipeline, and the other end of each injection and production pipeline is connected with a corresponding gas production tree through a corresponding second gas injection pipeline and a corresponding second gas production pipeline which are arranged in parallel; the gas injection supercharging equipment comprises multi-stage supercharging equipment driven by a driving device;
the first gas production pipeline and the second gas production pipeline are both provided with a pressure regulating device and a gas production control valve;
the first gas injection pipeline and the second gas injection pipeline are both provided with gas injection control valves, and the gas injection control valves are two-way valves.
2. The gas storage injection-production well injection-production device of claim 1, characterized in that: every pressure regulating device that sets up on second gas production line includes the gas and chews, the gas is chewed and is used for falling gas reservoir high-pressure gas to safety range.
3. The gas storage injection-production well injection-production device according to claim 1 or 2, characterized in that: the pressure regulating device arranged on the first gas production pipeline is a labyrinth pressure regulating valve and is used for stabilizing the pressure in the injection and production station within a safety range.
4. The gas storage injection-production well injection-production device according to claim 3, characterized in that: a ground safety valve is arranged on the gas production tree pipeline at one end of each gas production tree connected with the corresponding injection production pipeline; the pressure regulating device arranged on each second gas production pipe line further comprises a low-pressure limiting valve; the device also comprises a wellhead control cabinet, and the ground safety valve and the low-pressure limiting valve are both connected with the control cabinet.
5. The gas storage injection-production well injection-production device of claim 1, characterized in that: the device also comprises an inverse metering pipeline, wherein one end of the inverse metering pipeline is connected to each first gas production pipeline through a corresponding inverse metering control valve, and the other end of the inverse metering pipeline is connected to an inlet of the metering separator; the metering separator is provided with a liquid outlet which is connected with a liquid discharge pipeline.
6. The gas storage injection-production well injection-production device of claim 5, characterized in that: the metering separator is also provided with a first exhaust port and/or a second exhaust port; the first exhaust port is connected with a venting torch; the second exhaust port is connected with downstream gas production process equipment so that separated gas enters a downstream gas production process; the metering separator is also provided with a liquid level meter for monitoring the liquid level in the metering separator to avoid the separator from operating beyond the liquid level.
7. The gas storage injection-production well injection-production device of claim 1, wherein: pressure transmitters are arranged on the injection and production pipeline, the gas production manifold, the gas injection manifold, the first gas production pipeline and the gas tree; and temperature transmitters are arranged on the injection production pipeline, the first gas production pipeline and the gas production tree.
8. The gas storage injection-production well injection-production device of claim 7, characterized in that: the injection and production pipeline is also provided with an emergency cut-off track type ball valve and a single well flowmeter; a double-acting intercepting and stopping valve is further arranged on the first gas production pipe line; the gas injection supercharging equipment is provided with an overpressure backflow pneumatic control valve; the device also comprises a vent pipeline, wherein the vent pipeline is connected with the gas injection manifold, and an emergency vent valve is arranged on the vent pipeline.
9. The induced-flow liquid discharging method realized on the basis of the gas storage injection-production well injection-production device of claim 1 is characterized in that: the induced spray liquid discharge method comprises the following steps:
step 1:
101) opening a gas production control valve and a well-regulated pressure regulating device which are arranged on a second gas production pipeline on a normal gas well pipeline, introducing a high-pressure gas source of a gas production tree of a normal gas well into a corresponding injection production pipeline through the second gas production pipeline on the normal gas well pipeline, closing the gas production control valve on a corresponding first gas production pipeline, opening a bidirectional gas injection control valve on a corresponding first gas injection pipeline, and introducing the high-pressure gas source into a gas injection manifold through the corresponding first gas injection pipeline;
102) opening a two-way gas injection control valve on a first gas injection pipeline on the accumulated liquid gas well pipeline, reintroducing a high-pressure gas source obtained in a gas injection manifold into the corresponding first gas injection pipeline, opening a gas injection control valve on a corresponding second gas injection pipeline, entering the corresponding second gas injection pipeline through the corresponding gas injection and production pipeline, and introducing the accumulated liquid gas well through the corresponding second gas injection pipeline;
step 2: well closing;
and 3, step 3:
301) closing a two-way gas injection control valve on a first gas injection pipeline on a normal gas well pipeline, and closing the two-way gas injection control valve on the first gas injection pipeline on a liquid-accumulating gas well pipeline so as to conduct a gas production induced flow of the liquid-accumulating gas well;
302) the accumulated liquid enters the injection and production station through a second gas production pipeline on the accumulated liquid gas well pipeline and then through the corresponding injection and production pipeline so as to be introduced into gas-liquid separation equipment for gas-liquid separation;
and 4, step 4: and (3) carrying out the processes from the step 1 to the step 3 so as to completely discharge the accumulated liquid.
10. The induced liquid discharge method according to claim 9, characterized in that: and (3) debugging an emergency shutdown system before the step 1 to ensure that the normal well shut-in function and the central control real-time monitoring function under the emergency condition are realized, and the functions of compressor shutdown, compressor overpressure backflow and injection and production gas collecting pipe emptying are realized under the overpressure condition.
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