Multi-well metering system for gas well group

Abstract

The utility model discloses a multi-well metering system for a gas well group, and belongs to the technical field of gas well group multi-well metering. The multi-well metering system for the gas well group comprises the well group, a metering loop, a separation assembly and a PLC control cabinet, the metering loop comprises a pair of pipelines, first one-way valves are installed outside the pair of pipelines, first electric switch valves are installed at the positions, located on one sides of the first one-way valves, outside the pair of pipelines, and branch pipes are connected to the exteriors of the pair of pipelines; second electric switch valves are installed outside the pair of branch pipes, a manifold is connected between one ends of the pair of branch pipes, a pressure transmitter is installed outside the manifold, a control system is arranged in the PLC control cabinet, and the control system comprises a control module, a switching control module, a data acquisition module, a metering module, a data processing module and a communication module. And the control module, the switching control module, the data acquisition module, the metering module, the data processing module and the communication module are in signal transmission connection.

Description

Technical Field

[0001] The utility model relates to the technical field of multi-well metering of a gas well group, in particular to a multi-well metering system for a gas well group. Background Art

[0002] During gas well production, gas and liquid production are not only production parameters but also crucial process parameters. Accurate, real-time measurement of individual well gas and liquid production is crucial for developing precise drainage gas production plans and optimizing process parameters in real time.

[0003] Based on the above, the inventors have found the following problems: currently, during gas well production, only single wells can be metered, and the cost of single well metering is high and the metering accuracy is low, which is not convenient for on-site application in gas well production.

[0004] Therefore, in view of this, the existing structure and deficiencies are studied and improved, and a multi-well metering system for a gas well group is provided in order to achieve a purpose with greater practical value. Utility Model Content

[0005] The purpose of the utility model is to provide a multi-well metering system for a gas well group to solve the problems raised in the above background technology.

[0006] In view of the above problems, the technical solution proposed by the present invention is:

[0007] A multi-well metering system for a gas well group includes a well group, a metering circuit, a separation component and a PLC control cabinet. The metering circuit includes a pair of pipelines, each of which is equipped with a first one-way valve, and each of which is equipped with a first electric switch valve on the outside of the pair of pipelines and located on one side of the first one-way valve. The pair of pipelines are each connected to a branch pipe on the outside, and each of which is equipped with a second electric switch valve on the outside. A manifold is connected between one end of the pair of branch pipes, and a pressure transmitter is installed on the outside of the manifold. A control system is provided inside the PLC control cabinet. The control system includes a control module, a switching control module, a data acquisition module, a metering module, a data processing module and a communication module. Signal transmission is connected between the control module, the switching control module, the data acquisition module, the metering module, the data processing module and the communication module.

[0008] Furthermore, the well group includes a first gas well and a second gas well, and the first gas well and the second gas well are respectively connected to one end of a pair of pipes away from the first electric switch valve, and a compressed air inlet pipe is connected between the ends of the pair of pipes away from the well group.

[0009] The beneficial effect of adopting the above further solution is that, by providing a compressed air inlet pipe, it is convenient to connect the compressed air inlet pipe to the compressor, thereby performing gas lift production.

[0010] Furthermore, the separation component includes a two-phase separator, the bottom and upper ends of the two-phase separator are respectively connected to a liquid flow pipe and a gas flow pipe, the outside of the liquid flow pipe and the gas flow pipe are respectively installed with a liquid metering pump and a gas flow meter, and a second one-way valve is installed on the outside of the end of the liquid flow pipe and the gas flow pipe away from the two-phase separator, and a liquid level meter is installed on the outer wall of the two-phase separator.

[0011] The beneficial effect of adopting the above-mentioned further scheme is that by installing a two-phase separator, gas-liquid separation can be carried out on natural gas with liquid. Due to the different specific gravities of gas and liquid, when the liquid flows with the gas, it will be affected by gravity and produce a downward speed, while the gas still flows in the original direction. The liquid and gas tend to separate in the gravitational field, so that the separated gas and liquid are discharged through the gas circulation pipe and the liquid circulation pipe respectively. By installing a liquid metering pump and a gas flow meter, the liquid flow in the liquid circulation pipe and the gas flow in the gas circulation pipe are monitored respectively. By installing a second one-way valve, the backflow of liquid and gas in the liquid circulation pipe and the gas circulation pipe is avoided. At the same time, the liquid circulation pipe and the gas circulation pipe are connected to the external transmission pipeline.

[0012] Furthermore, the control module includes a touch screen and a central control automatic controller, and the input and output ends of the central control automatic controller are communicatively connected with the input and output ends of the liquid metering pump, the gas flow meter and the pressure transmitter.

[0013] The beneficial effect of adopting the above-mentioned further scheme is that by setting up a touch screen, the operator can conveniently perform timing and control work through the touch screen, and through the communication connection between the input and output ends of the central control automatic controller and the input and output ends of the liquid metering pump, gas flow meter and pressure transmitter, the flow data monitored by the liquid metering pump and gas flow meter and the gas injection pressure data monitored by the pressure transmitter are displayed through the touch screen. The time interval can be set for the central control automatic controller through the touch screen to facilitate the timely issuance of control signals.

[0014] Furthermore, the input and output ends of the switching control module are both communicatively connected with the input and output ends of the first electric switching valve and the second electric switching valve.

[0015] The beneficial effect of adopting the above further scheme is that when the set time is reached, the central control automatic controller sends a control signal, switching the control module to close the first electric switch valve and the second electric switch valve on the metering circuit connected to the first gas well, and open the first electric switch valve and the second electric switch valve on the metering circuit connected to the second gas well, thereby realizing time-sharing metering of the well group.

[0016] Furthermore, the metering module includes a liquid metering calculation module and a gas metering calculation module.

[0017] The beneficial effect of adopting the above further scheme is that, through the metering module, the central control automatic controller transmits data to the data acquisition module to collect the liquid flow and gas flow. The collected data are respectively input into the metering module, and the liquid-gas ratio of the liquefied natural gas is calculated through the liquid metering calculation module and the gas metering calculation module.

[0018] Furthermore, the data processing module includes a coprocessor, a control unit, a logic operation unit and a storage unit, and the communication module is wirelessly connected to the data analysis platform.

[0019] The beneficial effect of adopting the above further scheme is that, through the data processing module, the data is processed through the coordinated use of the coprocessor, control unit, logic operation unit and storage unit, thereby improving the data processing efficiency. At the same time, the processed data is remotely transmitted to the data analysis platform through the communication module, and then the data analysis platform automatically generates reports and curves for subsequent use in process parameter analysis.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows: when the multi-well metering system for a gas well group is used for gas-liquid separation and metering of the natural gas with liquid in the first gas well, a compressed air inlet pipe is provided, thereby facilitating the connection of the compressed air inlet pipe with the compressor, thereby performing gas lift production, so that the natural gas with liquid enters the interior of the two-phase separator through the pipeline, branch pipe and manifold, and by installing the two-phase separator, the natural gas with liquid can be separated into gas and liquid. By providing a touch screen, the operator can conveniently perform timing and control work through the touch screen, and the input and output ends of the central control automatic controller are communicated with the input and output ends of the liquid metering pump, the gas flow meter and the pressure transmitter, so that the flow data monitored by the liquid metering pump and the gas flow meter and the gas injection pressure data monitored by the pressure transmitter are displayed through the touch screen. The time interval can be set for the central control automatic controller through the touch screen so that the control signal can be sent out at regular intervals. When the set time is reached, At a certain time, the central control automatic controller sends a control signal to switch the control module to close the first electric switch valve and the second electric switch valve on the metering circuit connected to the first gas well, and open the first electric switch valve and the second electric switch valve on the metering circuit connected to the second gas well, thereby realizing time-sharing metering of the well group. Through the metering module, the central control automatic controller transmits data to the data acquisition module to collect liquid flow and gas flow. The collected data are respectively input into the metering module, and the liquid-gas ratio of the liquefied natural gas is calculated through the liquid metering calculation module and the gas metering calculation module. The data is processed by the data processing module. The coordinated use of the coprocessor, control unit, logical operation unit and storage unit improves the data processing efficiency. At the same time, the processed data is remotely transmitted to the data analysis platform through the communication module, and the data analysis platform automatically generates reports and curves for subsequent process parameter analysis. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of a flow chart of a multi-well metering system for a gas well group provided by the utility model;

[0022] Figure 2 A well group block diagram of a multi-well metering system for a gas well group provided by the utility model;

[0023] Figure 3 This is a metering circuit block diagram for a multi-well metering system for a gas well group provided by the utility model;

[0024] Figure 4 A block diagram of a separation component for a multi-well metering system for a gas well group provided by the utility model;

[0025] Figure 5 This is a module block diagram of a control system for a multi-well metering system in a gas well group provided by the utility model.

[0026] In the figure: 100, well group; 1001, first gas well; 1002, second gas well; 200, metering circuit; 2001, pipeline; 2002, first one-way valve; 2003, first electric on-off valve; 2004, branch pipe; 2005, second electric on-off valve; 2006, manifold; 2007, pressure transmitter; 300, separation component; 3001, two-phase separator; 3002, liquid circulation pipe; 3003, liquid metering pump; 3004, gas circulation pipe; 3005, gas flow meter; 3006, second one-way valve; 3007, liquid level gauge; 400, PLC control cabinet; 500, control system; 600, compressed air inlet pipe. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] See also Figure 1-Figure 5 The utility model provides a technical solution: a multi-well metering system for a gas well group, comprising a well group 100, a metering circuit 200, a separation component 300 and a PLC control cabinet 400, wherein the metering circuit 200 comprises a pair of pipes 2001, each of which is provided with a first one-way valve 2002 on the outside of the pair of pipes 2001, and each of which is provided with a first electric switch valve 2003 on the outside of the pair of pipes 2001 and located on one side of the first one-way valve 2002, and each of which is provided with a branch pipe 2004 on the outside of the pair of pipes 2001, and each of which is provided with a second electric switch valve 2005 on the outside of the pair of branch pipes 2004, and each of which is provided with a manifold 2006 between one end of the pair of branch pipes 2004, and a pressure transmitter 2007 on the outside of the manifold 2006, and the interior of the PLC control cabinet 400. The part is provided with a control system 500, which includes a control module, a switching control module, a data acquisition module, a metering module, a data processing module and a communication module. The control module, the switching control module, the data acquisition module, the metering module, the data processing module and the communication module are connected for signal transmission. When gas-liquid separation and metering of the liquefied natural gas in the first gas well 1001 are performed, a compressed air inlet pipe 600 is provided to facilitate the connection of the compressed air inlet pipe 600 with the compressor, thereby performing gas lift production, so that the liquefied natural gas enters the interior of the two-phase separator 3001 through the pipeline 2001, the branch pipe 2004 and the manifold 2006. The switching control module is provided to facilitate subsequent switching and metering of the first gas well 1001 and the second gas well 1002.

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] See also Figure 1-Figure 5 , the utility model provides a technical solution: the well group 100 includes a first gas well 1001 and a second gas well 1002, the first gas well 1001 and the second gas well 1002 are respectively connected to one end of a pair of pipes 2001 away from the first electric switch valve 2003, a compressed air inlet pipe 600 is connected between the ends of the pair of pipes 2001 away from the well group 100, the separation component 300 includes a two-phase separator 3001, the bottom end and the upper end of the two-phase separator 3001 are respectively connected to a liquid circulation pipe 3002 and a gas circulation pipe 3004, a liquid metering pump 3003 and a gas flow meter 3005 are respectively installed on the outside of the liquid circulation pipe 3002 and the gas circulation pipe 3004, and a second one-way valve 3006 is installed on the outside of the end of the liquid circulation pipe 3002 and the gas circulation pipe 3004 away from the two-phase separator 3001, and a liquid level meter 3007 is installed on the outer wall of the two-phase separator 3001. By installing a two-phase separator 3001, gas-liquid separation can be performed on natural gas with liquid. Due to the different specific gravities of gas and liquid, the liquid will be affected by gravity when flowing with the gas, generating a downward velocity, while the gas still flows in the original direction. The liquid and gas tend to separate in the gravitational field, thereby facilitating the discharge of the separated gas and liquid through the gas circulation pipe 3004 and the liquid circulation pipe 3002 respectively. By installing a liquid metering pump 3003 and a gas flow meter 3005, the flow rates of liquid in the liquid circulation pipe 3002 and gas in the gas circulation pipe 3004 are monitored respectively. By installing a second one-way valve 3006, backflow of liquid and gas in the liquid circulation pipe 3002 and the gas circulation pipe 3004 is avoided. At the same time, the liquid circulation pipe 3002 and the gas circulation pipe 3004 are connected to the external transmission pipeline. By installing a liquid level meter 3007, the liquid level is easily monitored.

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] See also Figure 1-Figure 5 The utility model provides a technical solution: the control module includes a touch screen and a central control automatic controller, the input and output ends of the central control automatic controller are communicated with the input and output ends of the liquid metering pump 3003, the gas flow meter 3005 and the pressure transmitter 2007, the input and output ends of the switching control module are communicated with the input and output ends of the first electric switch valve 2003 and the second electric switch valve 2005, the metering module includes a liquid metering calculation module and a gas metering calculation module, the data processing module includes a coprocessor, a control unit, a logic operation unit and a storage unit, and the communication module is wirelessly connected to the data analysis platform. By setting a touch screen, it is convenient for operators to perform timing and control work through the touch screen. Through the communication connection between the input and output ends of the central control automatic controller and the input and output ends of the liquid metering pump 3003, the gas flow meter 3005 and the pressure transmitter 2007, the flow data monitored by the liquid metering pump 3003 and the gas flow meter 3005 and the gas injection pressure data monitored by the pressure transmitter 2007 are displayed through the touch screen, and the touch screen can be used for the central control automatic controller. The controller sets a time interval so that a control signal is periodically issued. When the set time is reached, the central control automatic controller issues a control signal, causing the switching control module to close the first electric on-off valve 2003 and the second electric on-off valve 2005 on the metering circuit 200 connected to the first gas well 1001, and open the first electric on-off valve 2003 and the second electric on-off valve 2005 on the metering circuit 200 connected to the second gas well 1002, thereby achieving time-sharing metering of the well group 100. Through the metering module, the central control automatic controller transmits data to the data acquisition module to collect liquid flow and gas flow. The collected data is input into the metering module respectively. The liquid metering calculation module and the gas metering calculation module calculate the liquid-to-gas ratio of the natural gas with liquid. The data is processed by the data processing module. The coordinated use of the coprocessor, control unit, logical operation unit, and storage unit improves data processing efficiency. At the same time, the processed data is remotely transmitted to the data analysis platform via the communication module. The data analysis platform then automatically generates reports and curves for subsequent process parameter analysis.

[0033] Specifically, the working principle of the multi-well metering system for a gas well group is as follows: when using, when the gas-liquid separation and metering of the liquefied natural gas in the first gas well 1001 is carried out, by setting the compressed air inlet pipe 600, it is convenient to connect the compressed air inlet pipe 600 with the compressor, so as to carry out gas lift production, so that the liquefied natural gas enters the interior of the two-phase separator 3001 through the pipeline 2001, the branch pipe 2004 and the manifold 2006. By installing the two-phase separator 3001, the liquefied natural gas can be separated into gas and liquid. Due to the different specific gravities of gas and liquid, the liquid will be affected by gravity when flowing with the gas, generating a downward speed, while the gas still flows in the original direction. The liquid and gas tend to separate in the gravitational field. Thereby, the separated gas and liquid are discharged through the gas circulation pipe 3004 and the liquid circulation pipe 3002 respectively. By installing the liquid metering pump 3003 and the gas flow meter 3005, the liquid in the liquid circulation pipe 3002 and the gas flow in the gas circulation pipe 3004 are monitored respectively. By installing the second one-way valve 3006, the backflow of liquid and gas in the liquid circulation pipe 3002 and the gas circulation pipe 3004 is avoided. At the same time, the liquid circulation pipe 3002 and the gas circulation pipe 3004 are connected to the external transmission pipeline. By installing the liquid level meter 3007, it is convenient to monitor the liquid level. By setting the touch screen, the operator can perform timing and control work through the touch screen, and the input and output ports of the central control automatic controller are controlled. The communication connection between the input and output ends of the liquid metering pump 3003, the gas flow meter 3005 and the pressure transmitter 2007 facilitates the display of the flow data monitored by the liquid metering pump 3003 and the gas flow meter 3005 and the gas injection pressure data monitored by the pressure transmitter 2007 through the touch screen. The time interval can be set for the central control automatic controller through the touch screen so as to send out the control signal at a fixed time. When the set time is reached, the central control automatic controller sends out a control signal to switch the control module to close the first electric switch valve 2003 and the second electric switch valve 2005 on the metering circuit 200 connected to the first gas well 1001, and open the first electric switch valve 200 on the metering circuit 200 connected to the second gas well 1002. The closing valve 2003 and the second electric switch valve 2005 are used to realize the time-sharing metering of the well group 100. Through the metering module, the central control automatic controller transmits the data to the data acquisition module to collect the liquid flow and gas flow. The collected data are respectively input into the metering module, and the liquid-gas ratio of the liquefied natural gas is calculated through the liquid metering calculation module and the gas metering calculation module. The data is processed by the data processing module. The coordinated use of the coprocessor, the control unit, the logical operation unit and the storage unit improves the data processing efficiency. At the same time, the processed data is remotely transmitted to the data analysis platform through the communication module, and the data analysis platform automatically generates reports and curves for subsequent use in process parameter analysis.

Claims

1. A multi-well metering system for a gas well group, characterized in that: The invention comprises a well group (100), a metering circuit (200), a separation component (300) and a PLC control cabinet (400), wherein the metering circuit (200) comprises a pair of pipes (2001), the outside of each of the pair of pipes (2001) is provided with a first one-way valve (2002), and the outside of each of the pair of pipes (2001) is provided with a first electric switch valve (2003) located on one side of the first one-way valve (2002), and the outside of each of the pair of pipes (2001) is connected to a branch pipe (2004), and the outside of each of the pair of branch pipes (2004) is provided with a A second electric switch valve (2005) is provided, and a manifold (2006) is connected between one end of a pair of branch pipes (2004), a pressure transmitter (2007) is installed on the outside of the manifold (2006), a control system (500) is provided inside the PLC control cabinet (400), and the control system (500) includes a control module, a switching control module, a data acquisition module, a metering module, a data processing module and a communication module, and signal transmission is connected between the control module, the switching control module, the data acquisition module, the metering module, the data processing module and the communication module.

2. A multi-well metering system for a gas well group according to claim 1, characterized in that: The well group (100) comprises a first gas well (1001) and a second gas well (1002), wherein the first gas well (1001) and the second gas well (1002) are respectively connected to one end of a pair of pipes (2001) away from the first electric switch valve (2003), and a compressed air inlet pipe (600) is connected between the ends of the pair of pipes (2001) away from the well group (100).

3. The multi-well metering system for a gas well group according to claim 1, characterized in that: The separation assembly (300) includes a two-phase separator (3001), wherein the bottom end and the upper end of the two-phase separator (3001) are respectively connected to a liquid circulation pipe (3002) and a gas circulation pipe (3004), and a liquid metering pump (3003) and a gas flow meter (3005) are respectively installed on the outside of the liquid circulation pipe (3002) and the gas circulation pipe (3004), and a second one-way valve (3006) is installed on the outside of the end of the liquid circulation pipe (3002) and the gas circulation pipe (3004) away from the two-phase separator (3001), and a liquid level meter (3007) is installed on the outer wall of the two-phase separator (3001).

4. The multi-well metering system for a gas well group according to claim 1, characterized in that: The control module includes a touch screen and a central control automatic controller, and the input and output ends of the central control automatic controller are communicatively connected with the input and output ends of the liquid metering pump (3003), the gas flow meter (3005) and the pressure transmitter (2007).

5. A multi-well metering system for a gas well group according to claim 4, characterized in that: The input and output ends of the switching control module are both communicatively connected to the input and output ends of the first electric switching valve (2003) and the second electric switching valve (2005).

6. A multi-well metering system for a gas well group according to claim 5, characterized in that: The metering module includes a liquid metering calculation module and a gas metering calculation module.

7. A multi-well metering system for a gas well group according to claim 6, characterized in that: The data processing module includes a coprocessor, a control unit, a logic operation unit and a storage unit, and the communication module is connected to the data analysis platform through wireless communication.

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