CN118009244A - Throttling metering device and process for gas storage injection and production well site - Google Patents
Throttling metering device and process for gas storage injection and production well site Download PDFInfo
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Abstract
The invention discloses a throttling metering device and a throttling metering process for an injection and production well site of a gas storage, which relate to the technical field of injection and production of gas of the gas storage, and in particular relates to a throttling metering device for the injection and production well site of the gas storage, which is arranged between a gas production tree of the injection and production well and a gas production pipeline and comprises a gas injection pipeline, a gas production pipeline and a pipeline III, wherein the inflow end of the gas injection pipeline is communicated with the gas injection and production pipeline; the invention provides a throttling metering device and a throttling metering process for an injection and production well site of a gas storage, and the throttling metering device and the throttling metering process have the advantages of simple process flow, small equipment quantity, wide adaptability, low energy consumption, high localization rate of key equipment and the like. On one hand, the invention simplifies the throttle metering and the process of the gas injection and production in the well site, improves the operation flexibility and the adaptability of the device, and reduces the energy consumption; on the other hand, the number of key equipment is reduced, the localization rate of the key equipment is improved, and engineering investment and maintenance cost are saved, so that the whole technology reaches the advanced level in China.
Description
Technical Field
The invention relates to the technical field of gas storage injection and production, in particular to a throttling metering device and a process for a gas storage injection and production well site.
Background
Through development practice of over 100 years, the process technology of the underground gas storage in all countries of the world is continuously developed, and the gas storage ground process technology with different geological types, different gas conditions, different regional environments and different technical characteristics is formed. The method is characterized in that a well-known brand high-pressure large-displacement fuel gas is usually adopted to drive a reciprocating piston compressor abroad, and a part of motors drive a matched speed regulating mechanism; the gas injection process is mature, and the key valves and control system equipment are all from well known manufacturers; in the aspects of produced gas gathering and transportation and purification treatment, according to different geological types of gas storage, respectively adopting a dehydration process of a low-temperature separation method hydrocarbon, a water dew point control method and a glycol absorption method, and enabling the external gas hydrocarbon and the water dew point to meet the gas transmission requirement. The main process and equipment have complete suppliers and tend to be skid-mounted, integrated and high in automation control degree; the operation parameters of the gas injection and production process, peak shaving and emergency gas supply have strong planning performance and stable operation.
The domestic condensate gas reservoir gas reservoirs represented by the big harbor oil fields and the gold jar rock cavern gas reservoirs mainly adopt electric driving and gas driving reciprocating compressors and are matched with an inlet pressure flow throttling control mode; the natural gas dehydrated hydrocarbon and water dew point control process selects a conventional gas field development water injection hydrate inhibitor throttling refrigeration low-temperature separation method, the process flow is complex, the energy consumption is high, the construction and the application of a gas storage are far from the formation of a technical series and main equipment complete suppliers, and the whole process is in a starting development and lifting stage.
In recent years, the national gas storage is continuously researched and deepened aiming at a well site throttling metering device, and the utility model patent CN104100235A discloses a salt cavern gas storage gas injection and production gas collection and transportation prying device and a process method. The utility model patent CN103510922A discloses an injection-production distribution metering structure for a gas storage, the device is used for switching and metering of multiple wells of the gas storage, the device adopts an angle throttle valve to adjust the pressure of produced gas, and adopts a bidirectional metering flowmeter; the utility model patent CN107701925A discloses a single well injection and production common pipe bidirectional metering device and a metering method for a natural gas underground gas storage, the device calculates the parameters of gas by collecting pressure, temperature and opening data of a throttle valve, and judges flow, and the device adopts the throttle valve to regulate flow, a target flowmeter and an ultrasonic flowmeter to measure flow. The utility model patent CN203685134U discloses a gas storage injection and production distribution metering device, which consists of a gas production manifold sled, a gas injection manifold sled, a metering sled, a gas production throttle valve and a control ball valve, wherein the gas production throttle valve and the control ball valve are arranged on two layers, the device can be used for completing the distribution and metering of injection and production gas, the angle throttle valve is used for meeting the requirement of gas production pressure regulation, the axial flow throttle valve is used for controlling gas injection flow, and the bidirectional flowmeter is used for measuring flow. The utility model patent CN202012324U discloses a gas storage wellhead injection and production integrated module structure, which is used for throttling and metering of a gas storage well site, and adopts an electric axial flow type throttling valve and an electric ball valve to regulate flow and adopts a bidirectional target type flowmeter.
However, the technical schemes shown in the prior art all adopt bidirectional metering and electric angle type throttle valves, are not suitable for well sites which cannot be powered, and the price of the bidirectional metering flowmeter is more than 8 times of that of a common single flowmeter. Compared with the state of the art at home and abroad, the throttle metering device for the gas storage injection and production well site has been used for many years, but a bidirectional flowmeter is adopted, the flowmeter is a channel flowmeter, an on-line ultrasonic flowmeter and an external clamp ultrasonic flowmeter, the flowmeter adopts inlet equipment, the flow regulation adopts an electric angle throttle valve and an axial flow throttle valve, and the valves adopt inlet equipment and have high price. The equipment has wide application under the condition that the well site is provided with an external power supply, but has higher price and limited application. In order to overcome the problems in the prior art, the invention provides a special proposal for solving the problems.
Disclosure of Invention
(One) solving the technical problems
Aiming at the defects of the prior art, the invention provides a throttling metering device and a throttling metering process for an injection and production well site of a gas storage, and solves the problems in the background art.
(II) technical scheme
In order to achieve the above purpose, the invention is realized by the following technical scheme: the throttling metering device for the gas storage injection and production well site is arranged between a gas production tree of the injection and production well and a gas production pipeline and comprises a gas injection pipeline, a gas production pipeline and a pipeline III, wherein the inflow end of the gas injection pipeline is communicated with the gas production pipeline, the outflow end of the gas injection pipeline is communicated with the gas production tree of the injection and production well, the inflow end of the gas production pipeline is communicated with the gas production tree of the injection and production well, and the outflow end of the gas production pipeline is communicated with the gas production pipeline; the gas injection pipeline is communicated with the gas production pipeline through a pipeline III, and a wellhead high-low pressure emergency shutoff valve is arranged at the communication part of the gas injection pipeline and the gas production pipeline; the gas production pipeline is provided with a gas production unidirectional flow meter for measuring gas flow, a front gas production flow meter control valve and a rear gas production flow meter control valve are respectively arranged on two sides of the gas production unidirectional flow meter on the gas production pipeline, one end, close to a gas production tree of the injection and production well, of the gas production pipeline is provided with a gas production manual angle type throttle valve, and three pressure transmitters are arranged on the gas production pipeline; the gas injection pipeline is provided with a gas injection unidirectional flow meter for measuring gas flow, the gas injection pipeline is provided with a gas injection flow meter front control valve and a gas injection flow meter rear control valve respectively positioned on two sides of the gas injection unidirectional flow meter, and the gas injection pipeline is provided with a fourth pressure transmitter.
Optionally, the gas production pipeline comprises a first pipeline and a fourth pipeline, wherein the inflow end of the first pipeline is communicated with a gas production tree of the injection and production well, the outflow end of the first pipeline is communicated with one end of the third pipeline, and the other end of the third pipeline is communicated with the inflow end of the fourth pipeline; and the wellhead high-low pressure emergency shut-off valve is arranged on the third pipeline.
Optionally, the front control valve of the gas production flowmeter, the gas production unidirectional flowmeter and the rear control valve of the gas production flowmeter are sequentially arranged on a pipeline IV from an inflow end to an outflow end, and a filter is arranged on the pipeline IV.
Optionally, the three pressure transmitters are a first pressure transmitter, a second pressure transmitter and a third pressure transmitter respectively; the first pressure transmitter and the second pressure transmitter are both arranged on the fourth pipeline, the first pressure transmitter and the second pressure transmitter are respectively positioned on two sides of the gas production unidirectional flow meter, the third pressure transmitter is arranged on the first pipeline, and the first pipeline is provided with a hydrate inhibitor control valve and an L-shaped flow direction three-way structure gas flow limiting device.
Optionally, the gas injection pipeline comprises a pipeline five and a pipeline two, the inflow end of the pipeline five is communicated with the gas injection and production pipeline, the outflow end of the pipeline five is communicated with the inflow end of the pipeline two through a pipeline three, and the outflow end of the pipeline two is communicated with the gas production tree of the injection and production well.
Optionally, the front control valve of the gas injection flowmeter, the gas injection unidirectional flowmeter, the fourth pressure transmitter and the rear control valve of the gas injection flowmeter are sequentially arranged on the pipeline five from the inflow end to the outflow end; and an axial flow check valve is arranged on the second pipeline.
The throttling metering process for the gas storage injection and production well site comprises a gas injection metering emergency shutdown process and a gas production throttling metering emergency shutdown process; the gas injection metering emergency shutdown process comprises the following steps,
A: sequentially closing a wellhead gate valve, a gas production manual angle throttle valve, a front control valve of a gas production flowmeter and a rear control valve of the gas production flowmeter of the gas production tree of the injection and production well, wherein a gas production pipeline is in a closed state;
b: sequentially opening a front control valve of the gas injection flowmeter, a rear control valve of the gas injection flowmeter and a wellhead gate valve at the gas injection end of a gas production tree of the gas injection and production well, wherein a gas injection pipeline is in an open state;
c: high-pressure natural gas of the gathering injection station flows into the gas injection pipeline through the gas injection and production pipeline; measuring natural gas flow in the gas injection period through a gas injection unidirectional flow meter, monitoring gas injection pressure through a fourth pressure transmitter, and injecting high-pressure natural gas into an underground gas storage through a gas injection pipeline and a gas production tree of a gas injection production well in sequence;
d: in the gas injection process in the gas injection period, when the wellhead of the injection and production well and the injection and production gas pipeline fail, the wellhead high-low pressure emergency shutoff valve is closed remotely according to pressure or manpower.
The gas production throttling metering emergency shutdown process comprises the following steps of:
A: sequentially closing a front control valve of the gas injection flowmeter, a rear control valve of the gas injection flowmeter and a wellhead gate valve at the gas injection end of a gas production tree of the gas injection and production well, wherein a gas injection pipeline is in a closed state;
b: sequentially opening a wellhead gate valve, a gas production manual angle throttle valve, a front control valve of a gas production flowmeter and a rear control valve of the gas production flowmeter of the gas production tree of the injection and production well, wherein a gas production pipeline is in an open state;
C: natural gas in the gas storage flows through a gas production tree of the injection and production well and a gas production pipeline and then enters the injection and production pipeline; the natural gas is subjected to first-stage throttling and flow limiting through a gas production manual angle type throttling valve, and is subjected to second-stage throttling and flow limiting through a gas flow limiting device with an L-shaped flow direction three-way structure; monitoring the pressure of each section of gas on the gas production pipeline by using three pressure transmitters; measuring natural gas flow in the gas production period by using a gas production unidirectional flow meter;
D: in the gas production process in the gas production period, when the wellhead of the injection production well and the injection production gas pipeline fail, the wellhead high-low pressure emergency shutoff valve is closed remotely according to pressure or manpower;
E: in the early stage of gas production, a vehicle-mounted hydrate filling sled is used for injecting a hydrate inhibitor into a gas production pipeline through a hydrate inhibitor control valve, and gas reserved in a pipeline can be discharged through a root valve of a pressure transmitter in the sled, so that a gas nozzle is replaced.
(III) beneficial effects
The invention provides a throttling metering device and a throttling metering process for an injection and production well site of a gas storage, and the throttling metering device and the throttling metering process have the following beneficial effects:
1. The invention provides a throttling metering device and a throttling metering process for an injection and production well site of a gas storage, and the throttling metering device and the throttling metering process have the advantages of simple process flow, small equipment quantity, wide adaptability, low energy consumption, high localization rate of key equipment and the like. On one hand, the invention simplifies the throttle metering and the process of the gas injection and production in the well site, improves the operation flexibility and the adaptability of the device, and reduces the energy consumption; on the other hand, the number of key equipment is reduced, the localization rate of the key equipment is improved, and engineering investment and maintenance cost are saved, so that the whole technology reaches the advanced level in China.
2. The process flow is simple: the technological process meets the operation and safety protection measures, and according to the operation characteristics of the gas storage, the pressure separation is carried out on the natural gas through front and rear control valves of each gas meter (or front and rear control valves of each gas injection flowmeter) and splayed blind plates arranged on the front and rear control valves of each gas injection flowmeter, so that the number of process facilities and operation valves is optimized, and redundant and oversrotected facilities are optimized.
3. The number of equipment is reduced: according to the operation characteristics and the operation mode of the gas storage, the high-low pressure emergency shut-off valves of the gas injection pipeline and the gas production pipeline are integrated, the number of equipment is reduced, and meanwhile, the design pressure of the flowmeter, the filter and other equipment can be selected according to the gas production pressure, so that the number of high-pressure equipment is reduced.
4. The adaptability is wide: the device integrally meets different operation working conditions of the gas storage, selects special equipment according to harsh design conditions, adopts a throttling device with a replaceable air nozzle, meets different working condition requirements, and improves the applicability of equipment.
5. The system has less matching and high new energy utilization ratio: the electric equipment of the well site does not need an external power supply, and the electricity of the well site control system can be provided by a wind-solar complementary device arranged in the well site, so that the utilization ratio of new energy sources is reduced by external matching.
6. Localization of key equipment: the key equipment, the control valve and the system of the injection well site all realize localization.
7. The production device is modularized: the equipment and facilities of the injection well site are modularized, an integrated and skid-mounted scheme is made, the field engineering quantity is reduced, and the engineering investment is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a pipeline connection structure of a throttling metering device for an injection and production well site of a gas storage.
In the figure: 1. a gas production tree of the injection and production well; 2. manual angle throttle valve for gas production; 3. an axial flow check valve; 4. the wellhead high-low pressure emergency shut-off valve; 5. front control valve of gas production flowmeter; 6. the front splayed blind plate of the gas meter; 7. a first pressure transmitter; 8. a filter; 9. a gas production one-way flowmeter; 10. a second pressure transmitter; 11. a splayed blind plate behind the gas production flowmeter; 12. a rear control valve of the gas production flowmeter; 13. a hydrate inhibitor control valve; 14. an L-shaped flow direction three-way structure gas flow limiting device; 15. a third pressure transmitter; 16. a rear control valve of the gas injection flowmeter; 17. injection and production flow switching splayed blind plates; 18. a fourth pressure transmitter; 19. a gas injection one-way flowmeter; 20. a front control valve of the gas injection flowmeter; 21. a fifth pipeline; 22. a first pipeline; 23. a second pipeline; 24. a third pipeline; 25. a fourth pipeline; 26. a first three-way joint; 27. a second three-way joint; 28. a third tee joint; 29. and (5) an injection and production gas pipeline.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
Referring to fig. 1, the present invention provides the following technical solutions: the throttle metering device for the gas storage injection and production well site is installed at the gas storage injection and production well site in specific implementation and is used for injecting and producing gas at the gas storage injection and production well site and metering gas flow of gas injection and production.
Natural gas injection period: the gas from the gathering station flows through the gas injection and production pipeline 29 into the throttling metering device for the gas storage injection and production well site, and then natural gas is injected into the underground gas storage through the gas injection and production well gas production tree 1.
Natural gas production phase: natural gas enters the throttling metering device for the gas storage injection and production well site created by the invention through the injection and production well gas production tree 1, and then the natural gas flows out to the market through the injection and production gas pipeline 29.
The throttle metering device for the gas storage injection and production well site is arranged between the gas injection and production well gas production tree 1 and the gas injection and production pipeline 29 and comprises a gas injection pipeline, a gas production pipeline and a pipeline III 24. The inflow end of the gas injection pipeline is communicated with the gas injection and production pipeline 29, the outflow end of the gas injection pipeline is communicated with the gas production tree 1 of the gas injection and production well, the inflow end of the gas production pipeline is communicated with the gas production tree 1 of the gas injection and production well, and the outflow end of the gas production pipeline is communicated with the gas injection and production pipeline 29.
Wherein the gas injection pipeline is used for conveying the incoming gas in the gas injection pipeline 29 to the gas production tree 1 of the gas injection well. The gas production line is used for conveying the incoming gas in the gas production tree 1 of the injection and production well to the injection and production gas line 29.
The gas injection pipeline is mutually communicated with the gas production pipeline through a pipeline III 24, and a wellhead high-low pressure emergency shutoff valve 4 is arranged at the communication part of the gas injection pipeline and the gas production pipeline.
Because there is time difference between the gas injection period and the gas production period, that is, gas injection and gas production cannot be carried out simultaneously, the middle parts of the gas injection pipeline and the gas production pipeline are communicated with each other, and an independent wellhead high-low pressure emergency shutoff valve 4 is arranged at the communication position, and emergency cutting of the two pipelines is realized by utilizing the independent wellhead high-low pressure emergency shutoff valve 4. Namely, the high-low pressure emergency shut-off valve 4 of the wellhead of the gas injection pipeline and the gas production pipeline is arranged in a combined way, so that the number of equipment is reduced.
The gas production pipeline is provided with a gas production unidirectional flow meter 9 for measuring gas flow, and a gas production flow meter front control valve 5 and a gas production flow meter rear control valve 12 are respectively arranged on the gas production pipeline and positioned on two sides of the gas production unidirectional flow meter 9. Wherein, the front control valve 5 of the gas production flowmeter is provided with a front splayed blind plate 6 of the gas production flowmeter. The rear control valve 12 of the gas production flowmeter is provided with a rear splayed blind plate 11 of the gas production flowmeter. One end of the gas production pipeline, which is close to the gas production tree 1 of the injection and production well, is provided with a gas production manual angle type throttle valve 2, and three pressure transmitters are arranged on the gas production pipeline.
Wherein, the gas production unidirectional flow meter 9 is used for measuring the natural gas flow on the gas production pipeline. The front control valve 5 of the gas production flowmeter and the rear control valve 12 of the gas production flowmeter are used for controlling the on-off of a gas production pipeline. The three pressure transmitters are used for monitoring the natural gas pressure in the gas production pipeline.
Specifically, the gas production pipeline comprises a first pipeline 22 and a fourth pipeline 25, the inflow end of the first pipeline 22 is communicated with the gas production tree 1 of the injection and production well, the outflow end of the first pipeline 22 is communicated with one end of a third pipeline 24 through a first three-way joint 26, and the other end of the third pipeline 24 is communicated with the inflow end of the fourth pipeline 25 through a second three-way joint 27. The wellhead high-low pressure emergency shut-off valve 4 is mounted on a third pipeline 24. The front control valve 5 of the gas production flowmeter, the gas production unidirectional flowmeter 9 and the rear control valve 12 of the gas production flowmeter are sequentially arranged on a pipeline IV 25 from an inflow end to an outflow end, and a filter 8 is arranged on the pipeline IV 25.
Wherein, the front control valve 5 of the gas production flowmeter and the rear control valve 12 of the gas production flowmeter are used for controlling the on-off of the pipeline IV 25 at the upstream and downstream. The invention adopts the gas production unidirectional flowmeter 9, avoids adopting foreign channel type flowmeter, on-line ultrasonic flowmeter and external clamp type ultrasonic flowmeter, and greatly reduces the equipment cost.
More specifically, the three pressure transmitters are the first pressure transmitter 7, the second pressure transmitter 10, and the third pressure transmitter 15, respectively; the first pressure transmitter 7 and the second pressure transmitter 10 are both installed on a pipeline IV 25, the first pressure transmitter 7 and the second pressure transmitter 10 are respectively positioned on two sides of the gas production unidirectional flow meter 9, the third pressure transmitter 15 is installed on a pipeline I22, and the hydrate inhibitor control valve 13 and the L-shaped flow direction three-way structure gas flow limiting device 14 are installed on the pipeline I22.
Wherein the natural gas pressure of the section where the filter 8 is located is monitored by means of a first pressure transmitter 7. The gas production pressure of the gas production line is monitored by a second pressure transmitter 10. The natural gas pressure of the section where the wellhead high-low pressure emergency shut-off valve 4 is located is monitored through the third pressure transmitter 15, so that the monitoring of the shut-off state of the wellhead high-low pressure emergency shut-off valve 4 is realized. The first pipe 22 is mounted with the vehicle-mounted hydrate filling skid through the hydrate inhibitor control valve 13, and the first pipe 22 is communicated with the vehicle-mounted hydrate filling skid. The vehicle-mounted hydrate filling sled is used for adding a hydrate inhibitor to the gas production pipeline. In the initial stage of gas production, hydrate inhibitor can be injected into the first pipeline 22 through the vehicle-mounted hydrate filling sled, and gas reserved in the pipeline can be discharged through a root valve of a pressure transmitter in the sled, so that the replacement of the splayed blind plate 11 behind the gas production flowmeter and the splayed blind plate 6 in front of the gas production flowmeter is realized, and meanwhile, the replacement of a gas nozzle is realized. The L-shaped flow direction three-way structure gas flow limiting device 14 adopts an L-shaped flow direction three-way structure gas flow limiting device disclosed by the utility model patent CN207018714U, adopts a sonic nozzle to control gas flow, realizes stable depressurization and flow control of high-pressure gas, is convenient to detach and replace, and is suitable for different flow and pressure ranges of natural gas.
The gas injection pipeline is provided with a gas injection unidirectional flow meter 19 for measuring the gas flow, the gas injection pipeline is provided with a gas injection flow meter front control valve 20 and a gas injection flow meter rear control valve 16 respectively at two sides of the gas injection unidirectional flow meter 19, and the gas injection pipeline is provided with a fourth pressure transmitter 18.
The gas injection unidirectional flow meter 19 is used for measuring the natural gas flow in the gas injection pipeline, and the gas injection flow meter front control valve 20 and the gas injection flow meter rear control valve 16 are used for controlling the on-off of the gas injection pipeline in a segmented mode. The fourth pressure transmitter 18 is used to monitor the natural gas pressure of the gas injection line.
Specifically, the gas injection pipeline comprises a pipeline five 21 and a pipeline two 23, the inflow end of the pipeline five 21 is communicated with the gas injection and production pipeline 29 through a third three-way joint 28, the outflow end of the pipeline five 21 is communicated with the inflow end of the pipeline two 23 through a pipeline three 24, and the outflow end of the pipeline two 23 is communicated with the gas production tree 1 of the gas injection and production well.
Wherein the outflow end of the fifth pipeline 21 is communicated with the third pipeline 24 through a second three-way joint 27. The outflow end of the third pipe 24 communicates with the second pipe 23 via a first three-way connection 26.
More specifically, the gas injection flow meter front control valve 20, the gas injection one-way flow meter 19, the fourth pressure transmitter 18, and the gas injection flow meter rear control valve 16 are mounted on the pipe five 21 in this order from the inflow end to the outflow end. The second pipe 23 is provided with an axial flow check valve 3. The rear control valve 16 of the gas injection flowmeter is provided with a splayed blind plate 17 for flow switching of gas injection and production.
The axial flow check valve 3 is used for preventing natural gas in the gas production tree 1 of the injection and production well from flowing back through the second pipeline 23. The front control valve 20 of the gas injection flowmeter and the rear control valve 16 of the gas injection flowmeter are used for controlling the on-off of the internal flow passage of the pipeline five 21 at the upstream and downstream of the pipeline five 21 (or the upstream and downstream of the gas injection unidirectional flowmeter 19). The fourth pressure transmitter 18 is used to monitor the injection pressure.
The throttle metering process for the gas storage injection and production well site comprises a gas injection metering emergency shutdown process and a gas production throttle metering emergency shutdown process.
The gas injection metering emergency shutdown process comprises the following steps: a: sequentially closing a wellhead gate valve, a gas production manual angle throttle valve 2, a front control valve 5 of a gas production flowmeter and a rear control valve 12 of the gas production flowmeter of the gas production tree 1 of the injection and production well, wherein the gas production pipeline is in a closed state;
b: sequentially opening a front control valve 20 of the gas injection flowmeter, a rear control valve 16 of the gas injection flowmeter and a wellhead gate valve at the gas injection end of the gas production tree 1 of the gas injection and production well, wherein a gas injection pipeline is in an open state;
c: high pressure natural gas from the centralized injection station flows through the injection and production gas line 29 into the gas injection line; the natural gas flow in the gas injection period is measured by a gas injection unidirectional flow meter 19, the gas injection pressure is monitored by a fourth pressure transmitter 18, and the high-pressure natural gas sequentially flows through a gas injection pipeline and a gas injection and production well gas production tree 1 and is injected into an underground gas storage;
d: in the gas injection process in the gas injection period, when the wellhead of the injection and production well and the injection and production gas pipeline 29 fail, the wellhead high-low pressure emergency shutoff valve 4 is remotely closed according to pressure or people.
The gas production throttling metering emergency shutdown process comprises the following steps of:
a: sequentially closing a front control valve 20 of the gas injection flowmeter, a rear control valve 16 of the gas injection flowmeter and a wellhead gate valve at the gas injection end of the gas production tree 1 of the gas injection and production well, wherein a gas injection pipeline is in a closed state;
b: sequentially opening a wellhead gate valve, a gas production manual angle throttle valve 2, a gas production flowmeter front control valve 5 and a gas production flowmeter rear control valve 12 at the gas production end of a gas production tree 1 of the injection and production well, wherein a gas production pipeline is in an open state;
C: the natural gas in the gas storage flows through the gas production tree 1 of the injection and production well and the gas production pipeline and then enters the injection and production pipeline 29; the natural gas is subjected to first-stage throttling and flow limiting through a gas production manual angle type throttle valve 2, and is subjected to second-stage throttling and flow limiting through a gas flow limiting device 14 with an L-shaped flow direction three-way structure; monitoring the pressure of each section of gas on the gas production pipeline by using three pressure transmitters; measuring natural gas flow in the gas production period by using a gas production unidirectional flow meter 9;
D: in the gas production process in the gas production period, when the wellhead of the injection production well and the injection production gas pipeline 29 are in fault, the wellhead high-low pressure emergency shutoff valve 4 is closed remotely according to pressure or manpower;
E: in the early stage of gas production, a vehicle-mounted hydrate filling sled is used for injecting hydrate inhibitor into a gas production pipeline through a hydrate inhibitor control valve 13, and gas reserved in a pipeline can be discharged through a root valve of a pressure transmitter in the sled, so that a gas nozzle is replaced.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (8)
1. The utility model provides a gas storage annotates and adopts well site with throttle metering device, its setting is annotating and is adopted well gas production tree (1) and annotate and adopt gas pipeline (29), its characterized in that: the gas injection pipeline, the gas production pipeline and the pipeline III (24), wherein the inflow end of the gas injection pipeline is communicated with a gas injection and production pipeline (29), the outflow end of the gas injection pipeline is communicated with a gas production tree (1) of a gas injection and production well, the inflow end of the gas production pipeline is communicated with the gas production tree (1) of the gas injection and production well, and the outflow end of the gas production pipeline is communicated with the gas injection and production pipeline (29);
The gas injection pipeline is communicated with the gas production pipeline through a pipeline III (24), and a wellhead high-low pressure emergency shutoff valve (4) is arranged at the communication part of the gas injection pipeline and the gas production pipeline;
The gas production pipeline is provided with a gas production unidirectional flow meter (9) for measuring gas flow, a gas production flow meter front control valve (5) and a gas production flow meter rear control valve (12) are respectively arranged on two sides of the gas production unidirectional flow meter (9) on the gas production pipeline, one end, close to a gas production tree (1) of a gas injection and production well, of the gas production pipeline is provided with a gas production manual angle type throttle valve (2), and three pressure transmitters are arranged on the gas production pipeline;
The gas injection pipeline is provided with a gas injection unidirectional flow meter (19) for measuring gas flow, a gas injection flow meter front control valve (20) and a gas injection flow meter rear control valve (16) are respectively arranged on two sides of the gas injection unidirectional flow meter (19) on the gas injection pipeline, and a fourth pressure transmitter (18) is arranged on the gas injection pipeline.
2. A gas storage injection well site is with throttle metering device according to claim 1, wherein: the gas production pipeline comprises a first pipeline (22) and a fourth pipeline (25), wherein the inflow end of the first pipeline (22) is communicated with a gas production tree (1) of the injection and production well, the outflow end of the first pipeline (22) is communicated with one end of a third pipeline (24), and the other end of the third pipeline (24) is communicated with the inflow end of the fourth pipeline (25); the wellhead high-low pressure emergency shut-off valve (4) is arranged on a pipeline III (24).
3. A gas storage injection well site is with throttle metering device according to claim 2, wherein: the front control valve (5), the unidirectional gas production flowmeter (9) and the rear control valve (12) of the gas production flowmeter are sequentially arranged on a pipeline IV (25) from an inflow end to an outflow end, and a filter (8) is arranged on the pipeline IV (25).
4. A gas storage injection well site throttle metering device as claimed in claim 3, wherein: the three pressure transmitters are respectively a first pressure transmitter (7), a second pressure transmitter (10) and a third pressure transmitter (15); the first pressure transmitter (7) and the second pressure transmitter (10) are both arranged on a pipeline IV (25), the first pressure transmitter (7) and the second pressure transmitter (10) are respectively arranged on two sides of the gas production unidirectional flow meter (9), the third pressure transmitter (15) is arranged on a pipeline I (22), and a hydrate inhibitor control valve (13) and an L-shaped flow direction three-way structure gas flow limiting device (14) are arranged on the pipeline I (22).
5. A gas storage injection well site is with throttle metering device according to claim 1, wherein: the gas injection pipeline comprises a pipeline five (21) and a pipeline two (23), wherein the inflow end of the pipeline five (21) is communicated with a gas injection and production pipeline (29), the outflow end of the pipeline five (21) is communicated with the inflow end of the pipeline two (23) through a pipeline three (24), and the outflow end of the pipeline two (23) is communicated with a gas injection and production tree (1) of the injection and production well.
6. The throttling metering device for the gas storage injection and production well site according to claim 5, wherein the throttling metering device comprises the following components: the front control valve (20), the gas injection unidirectional flow meter (19), the fourth pressure transmitter (18) and the rear control valve (16) of the gas injection flow meter are sequentially arranged on the pipeline five (21) from the inflow end to the outflow end; and an axial flow check valve (3) is arranged on the second pipeline (23).
7. A throttling metering process for a gas storage injection and production well site, which is applicable to the throttling metering device for the gas storage injection and production well site according to any one of claims 1 to 6, and is characterized by comprising a gas injection metering emergency shutdown process and a gas production throttling metering emergency shutdown process;
the gas injection metering emergency shutdown process comprises the following steps,
A: sequentially closing a wellhead gate valve at the gas production end of a gas production tree (1) of the injection and production well, a gas production manual angle throttle valve (2), a front control valve (5) of a gas production flowmeter and a rear control valve (12) of the gas production flowmeter, wherein the gas production pipeline is in a closed state;
b: sequentially opening a front control valve (20) of the gas injection flowmeter, a rear control valve (16) of the gas injection flowmeter and a wellhead gate valve at the gas injection end of a gas production tree (1) of the gas injection well, wherein a gas injection pipeline is in an open state;
c: high-pressure natural gas of the gathering injection station flows into the gas injection pipeline through the gas injection and production pipeline (29); the natural gas flow in the gas injection period is metered through a gas injection unidirectional flow meter (19), the gas injection pressure is monitored through a fourth pressure transmitter (18), and the high-pressure natural gas sequentially flows through a gas injection pipeline and a gas production tree (1) of a gas injection production well and is injected into an underground gas storage;
d: in the gas injection process in the gas injection period, when the wellhead of the injection and production well and the injection and production gas pipeline (29) fail, the wellhead high-low pressure emergency shutoff valve (4) is closed remotely according to pressure or people.
8. The throttling metering process for the gas storage injection and production well site, as recited in claim 7, is characterized in that the gas production throttling metering emergency shutdown process comprises the following steps:
A: sequentially closing a front control valve (20) of the gas injection flowmeter, a rear control valve (16) of the gas injection flowmeter and a wellhead gate valve at the gas injection end of a gas production tree (1) of the gas injection well, wherein a gas injection pipeline is in a closed state;
B: sequentially opening a wellhead gate valve at the gas production end of a gas production tree (1) of the injection and production well, a gas production manual angle throttle valve (2), a front control valve (5) of a gas production flowmeter and a rear control valve (12) of the gas production flowmeter, wherein the gas production pipeline is in an open state;
C: natural gas in the gas storage flows through a gas production tree (1) of the injection and production well and a gas production pipeline and then enters into an injection and production gas pipeline (29); the natural gas is subjected to first-stage throttling and flow limiting through a gas production manual angle type throttling valve (2), and is subjected to second-stage throttling and flow limiting through a gas flow limiting device (14) with an L-shaped flow direction three-way structure; monitoring the pressure of each section of gas on the gas production pipeline by using three pressure transmitters; measuring the natural gas flow in the gas production period by using a gas production unidirectional flow meter (9);
d: in the gas production process in the gas production period, when the wellhead of the injection production well and the injection production gas pipeline (29) are in fault, the wellhead high-low pressure emergency shutoff valve (4) is closed remotely according to pressure or manpower;
E: in the early stage of gas production, a vehicle-mounted hydrate filling sled is used for injecting a hydrate inhibitor into a gas production pipeline through a hydrate inhibitor control valve (13), and gas reserved in a pipeline can be discharged through a root valve of a pressure transmitter in the sled, so that a gas nozzle is replaced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410282396.7A CN118009244A (en) | 2024-03-12 | 2024-03-12 | Throttling metering device and process for gas storage injection and production well site |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410282396.7A CN118009244A (en) | 2024-03-12 | 2024-03-12 | Throttling metering device and process for gas storage injection and production well site |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118009244A true CN118009244A (en) | 2024-05-10 |
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ID=90948432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410282396.7A Pending CN118009244A (en) | 2024-03-12 | 2024-03-12 | Throttling metering device and process for gas storage injection and production well site |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118009244A (en) |
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2024
- 2024-03-12 CN CN202410282396.7A patent/CN118009244A/en active Pending
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