Gas lift control method for circulating gas lift pipe network and adjacent well gas injection

Abstract

The invention provides a circulation gas lift pipe network and a gas lift control method for adjacent well gas injection, the circulation gas lift pipe network comprises a gas source well, a plurality of gas lift wells, an automatic gas lift control assembly and a well group energy pipeline, the gas source well is provided with an oil pipe pipeline and a sleeve pipeline; the gas-lifted well is provided with an oil pipe pipeline and a sleeve pipeline; the well group energy pipeline is connected with the gas source well and is externally connected to the gated gas-lifted well in the plurality of gas-lifted wells through the automatic gas lift control assembly, and the gas source well injects gas into an oil pipe pipeline or a sleeve pipeline of the gated gas-lifted well through the oil pipe pipeline or the sleeve pipeline of the gas source well; and the gas injection gas lift of the gated gas lift well is realized. By means of the scheme, the technical problems that an existing gas injection gas lift is low in efficiency and high in cost are solved, and the technical effects that the cost of the gas injection gas lift is effectively reduced, and the gas injection efficiency is improved are achieved.

Description

Technical Field

[0001] The present application belongs to the technical field of oil and gas exploration, and in particular relates to a circulating gas lift pipeline network and a gas lift control method for gas injection into adjacent wells. Background Art

[0002] Shale gas resources are very rich, with large recoverable reserves. However, in the middle and late stages of shale gas well development, as the degree of recovery increases and the formation pressure decreases, production is often accompanied by the invasion of edge and bottom water and condensate oil, which is harmful to the exploitation of gas sources, leading to reduced gas production, and causing problems such as wellbore liquid accumulation and water flooding.

[0003] When the wellhead pressure approaches 3Mpa~4MPa, it is close to the lower limit of the application of the main drainage and production processes such as plunger and bubble drainage. In order to further drain the liquid and stabilize the production, for this situation of shale gas wells, gas reinjection (gas lift) is generally used to replenish the gas well energy and assist the plunger and bubble drainage process in drainage. Among them, gas lift is to achieve the purpose of lifting the accumulated liquid in the well by injecting high-pressure gas into the wellbore for a short period of time. This method is suitable for flooded well resumption of production, drainage assistance and gas reservoir drainage. The wellbore generally includes: an oil pipe and a casing arranged outside the oil pipe. An annular space is formed between the casing and the oil pipe. When gas is injected into the annular space, the liquid level in the annular space is squeezed downward to make the liquid level in the oil pipe rise, thereby achieving the purpose of low-pressure production of shale gas wells.

[0004] The existing method is generally to collect shale gas with high production and high pressure in the early stage of gas well exploitation through a vehicle-mounted compressor, and pressurize the shale gas. For the later stage of exploitation, it is generally injected into the annulus of the oil pipe and casing to make the wellhead pressure rise to a stable level. However, this operation method is relatively costly. The gas source for gas lift of some shale gas platform wells is provided by nitrogen input from a nitrogen generator, and the nitrogen is injected into the gas well. However, the nitrogen input from the nitrogen generator directly affects the gas production quality of the gas well, and the gas produced in the gas lift process needs to be vented and incinerated for a long time, which not only affects the production efficiency of the shale gas platform wells, but also causes waste of resources and environmental pollution. Furthermore, this gas production method will have a long period of shut-in, re-pressurization and resumption of production, and the injection of foaming agents requires separate operation of single wells, which affects the production efficiency of the shale gas platform wells, and the operation cost is relatively high.

[0005] To address the above problems, no effective solution has been proposed yet. Summary of the invention

[0006] The purpose of the present application is to provide a gas lift control method for a circulating gas lift pipeline network and gas injection in adjacent wells, so as to achieve the purpose of simple and efficient gas lift.

[0007] The present application provides a gas lift control method for a circulating gas lift pipeline network and gas injection in adjacent wells, which is implemented as follows:

[0008] A circulating gas lift pipeline network includes: a gas source well, a plurality of gas-lifted wells, an automatic gas lift control assembly, and a well group energy pipeline, wherein:

[0009] The gas source well is provided with an oil pipe and a casing pipe;

[0010] The gas-lifted well is provided with an oil pipe and a casing pipe;

[0011] The energy pipeline of the well group is connected to the gas source well, and is externally connected to the selected gas-lifted well among the multiple gas-lifted wells through the automatic gas lift control assembly. Gas is injected from the gas source well into the oil pipe or casing pipe of the selected gas-lifted well through the oil pipe or casing pipe of the gas source well, thereby realizing gas injection and gas lift of the selected gas-lifted well.

[0012] In one embodiment, the automatic gas lift control assembly is provided with: a wireless receiver, a circulating gas lift controller, and a solenoid valve, wherein:

[0013] The wireless receiver is used to receive the wellhead parameters of each gas-lifted wellhead;

[0014] The circulating gas lift controller is connected to the wireless receiver and is used to determine the selected gas lift wells and the opening of the corresponding solenoid valves according to the wellhead parameters of each gas lift well;

[0015] The solenoid valve is connected to the circulating gas lift controller and is used to control the opening degree under the control of the circulating gas lift controller to achieve control of the gas injection flow rate.

[0016] In one embodiment, a first oil pipe flow regulator is provided at the oil pipe of the gas-lifted well, and a second oil pipe flow regulator is provided at the casing pipe of the gas-lifted well, wherein the first oil pipe flow regulator and the second oil pipe flow regulator are solenoid valve structures with remote transmission and remote control functions, which are used to collect pressure data and temperature data at the wellhead, and transmit the collected pressure data and temperature data to the automatic gas lift control assembly, and are also used to control the switch and opening of the solenoid valve according to the feedback instructions of the automatic gas lift control assembly.

[0017] In one embodiment, the oil pipe of the gas source well is connected to the oil pipe of the gas-lifted well through the well group energy pipeline, or the casing of the gas source well is connected to the casing of the gas-lifted well through the well group energy pipeline.

[0018] In one embodiment, the oil pipeline of the gas source well is a gas tree structure, which is connected to the casing pipeline of the gas source well, and the oil pipeline of the gas-lifted well is a gas tree structure, which is connected to the casing pipeline of the gas-lifted well.

[0019] A gas lift control method for gas injection into adjacent wells based on a circulating gas lift pipeline network, comprising:

[0020] Acquire wellhead parameters of each gas-lifted well among a plurality of gas-lifted wells;

[0021] According to the wellhead parameters of each of the plurality of gas-lifted wells, determining whether there is a gas-lifted well whose wellhead parameter is lower than a preset threshold;

[0022] The gas-lifted wells whose wellhead parameters are lower than a preset threshold are regarded as the selected gas-lifted wells;

[0023] Gas is injected into the selected gas-lift well through the gas source well to achieve gas injection and gas lift of the selected gas-lift well.

[0024] In one embodiment, the wellhead parameters include at least one of the following: changes in gas well production and gas well liquid carrying capacity, wherein the changes in gas well production include at least one of the following: changes in daily production of the gas well, changes in instantaneous gas production of the gas well, and the gas well liquid carrying capacity may include at least one of the following: casing pressure, shut-in oil casing pressure difference, and critical liquid carrying flow rate of the gas well.

[0025] In one embodiment, the process of injecting gas into the selected gas lift well through the gas source well includes:

[0026] Gradually increasing the opening of the electromagnetic valve of the first tubing flow regulator provided at the tubing pipeline of the selected gas lift well or the second tubing flow regulator provided at the casing pipeline to increase the gas injection volume;

[0027] Determining the gas pressure required for normal production of the selected gas lift well;

[0028] Determining whether the selected gas-lift well reaches the gas pressure required for normal production;

[0029] When it is determined that the required gas pressure is reached, the opening of the solenoid valve of the first tubing flow regulator or the second tubing flow regulator provided at the casing pipeline of the selected gas lift well is adjusted to 0 to stop gas injection.

[0030] In one embodiment, determining the gas pressure required for normal production of the selected gas lift well includes:

[0031] Obtaining the shut-in oil casing pressure difference of the selected gas-lifted well;

[0032] Calculating the amount of liquid accumulated in the wellbore according to the shut-in oil-casing pressure difference;

[0033] Determine the bottom hole flow pressure required for lifting the liquid according to the amount of liquid accumulated in the wellbore;

[0034] The wellhead pressure is determined according to the bottom hole flow pressure, and the determined wellhead pressure is used as the gas pressure required for normal production of the selected gas lift well.

[0035] A computer-readable storage medium stores a computer program / instruction, which implements the steps of the above method when executed by a processor.

[0036] The circulating gas lift pipeline network provided by the present application includes: a gas source well, multiple gas-lifted wells, an automatic gas lift control assembly, and a well group energy pipeline, wherein the gas source well is provided with an oil pipe and a casing pipe, and the gas-lifted well is also provided with an oil pipe and a casing pipe; it is connected to the gas source well through the well group energy pipeline, and is externally connected to the selected gas-lifted well among the multiple gas-lifted wells through the automatic gas lift control assembly, and the gas source well injects gas into the oil pipe or casing pipe of the selected gas-lifted well through the oil pipe or casing pipe of the gas source well, thereby realizing gas injection and gas lift of the selected gas-lifted well. The above scheme realizes the purpose of gas injection in adjacent wells and gas injection from high-pressure wells to low-pressure wells, solves the technical problems of low efficiency and high cost of existing gas injection and gas lift, and achieves the technical effect of effectively reducing the cost of gas injection and gas lift and improving gas injection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0038] Figure 1 It is a structural diagram of the circulating gas lift network provided by this application;

[0039] Figure 2 This is a method flow chart of an embodiment of a gas lift control method for gas injection in adjacent wells provided by the present application;

[0040] Figure 3 It is a structural schematic diagram of a circulating gas lift network for a high-pressure well to lift a low-pressure well provided by the present application;

[0041] Figure 4 It is a hardware structure block diagram of an electronic device of a gas lift control method for gas injection in an adjacent well provided by the present application;

[0042] Figure 5 It is a schematic diagram of the module structure of an embodiment of a gas lift control device for gas injection in adjacent wells provided in the present application. DETAILED DESCRIPTION

[0043] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this application.

[0044] In this case, the mode of injecting gas from high-pressure wells on the same platform to low-pressure wells is adopted to realize the comprehensive utilization of the energy of the platform well group and realize the gas lift operation from a single gas source well to multiple wells, thereby solving the problems of low production efficiency, high operating costs, and environmental pollution caused by gas lift by nitrogen generators on existing shale gas platforms. Figure 1 As shown, a circulating gas lift pipeline network is provided, including: a gas source well 101, a plurality of gas-lifted wells 102, an automatic gas lift control assembly 103, and a well group energy pipeline 104, wherein:

[0045] The gas source well 101 is provided with an oil pipe pipeline and a casing pipeline;

[0046] The gas-lifted well 102 is provided with a tubing pipeline and a casing pipeline;

[0047] The well group energy pipeline 104 is connected to the gas source well 101, and is externally connected to the selected gas-lifted well among the multiple gas-lifted wells through the automatic gas-lift control assembly 103. Gas is injected from the gas source well into the oil pipe or casing pipe of the selected gas-lifted well through the oil pipe or casing pipe of the gas source well, thereby realizing gas injection and gas lift of the selected gas-lifted well.

[0048] Specifically, the automatic gas lift control assembly 103 may be provided with: a wireless receiver, a circulating gas lift controller, and a solenoid valve, wherein: the wireless receiver is used to receive the wellhead parameters of each gas-lifted wellhead; the circulating gas lift controller is connected to the wireless receiver, and is used to determine the selected gas-lifted wells and the opening of the corresponding solenoid valve according to the wellhead parameters of each gas-lifted wellhead; the solenoid valve is connected to the circulating gas lift controller, and is used to control the opening under the control of the circulating gas lift controller to achieve control of the gas injection flow rate.

[0049] In order to control the timing and amount of gas injection, a flow regulator can be set in the injected gas well. For example, a first oil pipe flow regulator is set at the oil pipe of the gas lift well, and a second oil pipe flow regulator is set at the casing pipe of the gas lift well. The first oil pipe flow regulator and the second oil pipe flow regulator are solenoid valve structures with remote transmission and remote control functions, which are used to collect pressure data and temperature data at the wellhead, and transmit the collected pressure data and temperature data to the automatic gas lift control assembly, and are also used to control the switch and opening of the solenoid valve according to the feedback instructions of the automatic gas lift control assembly.

[0050] The oil pipe pipeline of the gas source well can be connected to the oil pipe pipeline of the gas-lifted well through the well group energy pipeline, or the casing pipeline of the gas source well can be connected to the casing pipeline of the gas-lifted well through the well group energy pipeline, that is, when actually injecting gas, the casing pipeline can be selected as the gas injection pipeline, or the oil pipe pipeline can be selected as the gas injection pipeline. Specifically, the oil pipe pipeline of the gas source well can be a gas tree structure, connected to the casing pipeline of the gas source well, and the oil pipe pipeline of the gas-lifted well can also be a gas tree structure, connected to the casing pipeline of the gas-lifted well.

[0051] In the above example, by setting up a well group energy pipeline, the gas source well is connected to multiple gas-lifted wells. When there is a demand, gas can be injected into the gas-lifted wells through the gas source well, and the connection and gas injection control can be achieved through the automatic gas lift control assembly.

[0052] Based on the above-mentioned circulating gas lift pipeline network, a gas lift control method for gas injection in adjacent wells is provided in this example. Figure 2 It is a method flow chart of an embodiment of the gas lift control method for gas injection in adjacent wells provided by the present application. Although the present application provides method operation steps or device structures as shown in the following embodiments or drawings, more or fewer operation steps or module units may be included in the method or device based on routine or no creative labor. In the steps or structures where there is no necessary causal relationship logically, the execution order of these steps or the module structure of the device is not limited to the execution order or module structure described in the embodiments of the present application and shown in the drawings. When the method or module structure described is applied to an actual device or terminal product, it can be connected according to the method or module structure shown in the embodiments or drawings for sequential execution or parallel execution (for example, a parallel processor or a multi-threaded processing environment, or even a distributed processing environment).

[0053] Specifically, Figure 2 As shown, the above-mentioned gas lift control method for gas injection in adjacent wells may include the following steps:

[0054] Step 201: Acquire wellhead parameters of each gas-lifted well among a plurality of gas-lifted wells;

[0055] Among them, the wellhead parameters may include but are not limited to at least one of the following: changes in gas well production and gas well liquid carrying capacity, wherein the gas well production changes may include but are not limited to at least one of the following: changes in the daily output of the gas well, changes in the instantaneous gas production of the gas well, and the gas well liquid carrying capacity may include but is not limited to at least one of the following: casing pressure, shut-in oil casing pressure difference, and critical liquid carrying flow rate of the gas well.

[0056] Step 202: determining whether there is a gas-lifted well whose wellhead parameter is lower than a preset threshold value according to the wellhead parameters of each gas-lifted well among the plurality of gas-lifted wells;

[0057] Specifically, the wellhead parameters may be normalized, that is, a weight may be set for each parameter, and a normalized value of a specific wellhead parameter may be obtained by weighted accumulation, and then the normalized wellhead parameter value may be compared with a preset threshold.

[0058] Step 203: The gas-lifted wells whose wellhead parameters are lower than a preset threshold are selected as the gas-lifted wells;

[0059] Step 204: injecting gas into the selected gas-lift well through the gas source well to achieve gas injection and gas lift of the selected gas-lift well.

[0060] That is, the timing of gas lift intervention is determined by recording the wellhead parameters of the gas-lifted well and the wellhead parameters obtained in real time, and the wellhead parameters of the actual gas-lifted well are collected through the regulator at the wellhead and compared with the preset threshold value, and the comparison result is fed back to the automatic gas lift control assembly; if the wellhead parameter of a gas-lifted well is lower than the preset threshold value, the automatic gas lift control assembly controls the opening of the regulator of the oil pipe or casing pipeline of the corresponding gas-lifted well to start gas injection.

[0061] In the process of injecting gas into the selected gas-lift well through the gas source well, the opening of the solenoid valve of the first tubing flow regulator set at the tubing pipeline of the selected gas-lift well or the second tubing flow regulator set at the casing pipeline can be gradually increased to increase the gas injection volume; determine the gas pressure required for normal production of the selected gas-lift well; determine whether the selected gas-lift well reaches the gas pressure required for normal production; when it is determined that the required gas pressure is reached, adjust the opening of the solenoid valve of the first tubing flow regulator set at the tubing pipeline of the selected gas-lift well or the second tubing flow regulator set at the casing pipeline to 0 to stop gas injection.

[0062] Among them, determining the gas pressure required for normal production of the selected gas-lifted well may include: obtaining the shut-in casing pressure difference of the selected gas-lifted well; calculating the amount of liquid accumulated in the wellbore according to the shut-in casing pressure difference; determining the bottom hole flow pressure required for lifting the liquid according to the amount of liquid accumulated in the wellbore; determining the wellhead pressure according to the bottom hole flow pressure, and using the determined wellhead pressure as the gas pressure required for normal production of the selected gas-lifted well.

[0063] That is, by setting up a well group energy pipeline, the gas source well is connected to multiple gas-lifted wells, the oil pipe and casing are connected through the pipeline, and flow regulators are set at the wellheads of the oil pipe and casing. Positive lift or reverse lift can be selected according to actual needs, and the valve opening can be controlled according to the liquid accumulation and water flooding of the gas-lifted well to achieve precise control of the gas injection volume. Among them, the wellhead process of the gas source well and the gas-lifted well is the same. The gas source well is connected to multiple gas-lifted wells through the well group energy pipeline, and the gas lift process is selected according to actual needs. At the same time, the flow regulator is opened to achieve inter-well gas injection on the platform.

[0064] The gas lift control method for gas injection in adjacent wells provided in the above example can be used when the formation pressure of a gas well decreases in the middle and late stages, and liquid accumulation affects gas production, so that a low-pressure well needs to be lifted by a high-pressure well on the same platform. By using the high-pressure well as a gas source well, gas is injected to supplement the wellbore energy of the low-pressure well, thereby achieving liquid drainage and gas production in the low-pressure well, providing an efficient water drainage and gas production process method for the effective development of platform gas wells.

[0065] The above method is described below in conjunction with a specific embodiment. However, it should be noted that this specific embodiment is only for better illustrating the present application and does not constitute an improper limitation on the present application.

[0066] In this example, a circulating gas lift method and equipment for injecting gas into adjacent wells on the same shale gas platform are provided. By injecting gas from high-pressure wells to low-pressure wells on the same platform, comprehensive utilization of the energy of the platform well group is achieved, and gas lift operations from a single gas source well to multiple wells are realized, thereby solving the problems of low production efficiency, high operating costs, and environmental pollution caused by gas lift by nitrogen generators on existing shale gas platforms.

[0067] Specifically, a circulating gas lift pipeline network is provided for lifting low-pressure wells from high-pressure wells on the same platform of shale gas, wherein the circulating gas lift pipeline network includes: a flow regulator, a production pipeline, a well group energy pipeline, and an automatic gas lift control assembly; a gas source well and a plurality of gas-lifted wells can be connected through the circulating gas lift pipeline network, and oil pipes, casing pipes and production pipelines are provided in the gas source well and the gas-lifted wells.

[0068] Among them, the oil pipe pipeline and the casing pipeline are connected, and gas lifting can be performed through the oil pipe pipeline or the casing pipeline. There are multiple flow regulators, and the oil pipe pipeline and the casing pipeline are respectively arranged at the wellheads of the gas source well and the gas-lifted well, and are connected with the wellheads of the gas source well and the gas-lifted well through the flow regulators. The oil pipe pipeline and the casing pipeline of the gas source well are connected with the oil pipe pipelines and the casing pipelines of multiple gas-lifted wells through the automatic gas lift control assembly and pipelines to form a well group energy pipeline. The well group energy pipeline connects the gas source well with multiple gas-lifted wells and is controlled by the automatic gas lift control assembly to realize the switch of gas lift, the adjustment of gas source flow, and the function of high-pressure well gas lifting low-pressure well.

[0069] Based on the above-mentioned circulating gas lift pipeline network, a method for determining the timing of gas lift intervention and the amount of gas injection is also provided in this example, including:

[0070] S1: Determine the timing of gas lift intervention based on the wellhead parameters of the gas-lifted well, where the wellhead parameters may include: changes in gas well production and gas well liquid carrying capacity. The timing of gas lift intervention can be analyzed and determined through the wellhead parameters. The changes in gas well production may include: changes in daily production of gas wells, changes in instantaneous gas production of gas wells, and the analysis of gas well liquid carrying capacity may include casing pressure, shut-in oil casing pressure difference, and critical liquid carrying flow rate of gas wells, and thresholds are set for these wellhead parameters;

[0071] S2: The actual wellhead parameters of the gas-lifted well are collected through the regulator at the wellhead, and compared with the preset threshold value, and the comparison result is fed back to the automatic gas lift control assembly;

[0072] S3: If the wellhead parameter of a gas-lifted well is lower than a preset threshold, the automatic gas-lift control assembly controls to open the regulator of the tubing or casing pipeline of the corresponding gas-lifted well to start gas injection;

[0073] When injecting gas, the amount of gas injected can be determined in the following manner: by increasing the valve opening step by step to control, and under the premise of ensuring that the gas injection pressure meets the pressure required for lifting the liquid, adjusting the regulator of the oil pipe or casing pipeline to increase the valve opening step by step to increase the gas injection amount, so as to achieve the gas pressure required for normal production of the gas-lifted well; wherein, the gas pressure required for normal production of the gas-lifted well can be determined in the following manner: first, the amount of liquid accumulated in the wellbore is calculated by reverse calculation from the shut-in oil-casing pressure difference, and then the bottom hole flow pressure required for lifting the liquid is calculated, and reverse calculation is made to the wellhead pressure, so as to obtain the gas pressure required for normal production of the gas-lifted well;

[0074] S4: Real-time monitoring of the wellhead parameters of the gas-lifted well. When the wellhead parameters are higher than the set threshold, that is, the gas well resumes normal production, the results are fed back to the automatic gas lift control assembly to stop gas injection in the gas-lifted well, that is, the controller stops gas injection in the gas source well.

[0075] The above-mentioned automatic gas lift control assembly can be arranged between a gas source well and a plurality of gas-lifted wells, and the control assembly can determine which well to start the gas injection process according to the real-time wellhead parameters of the gas-lifted wells. Specifically, it can include:

[0076] S1: The gas injection switch + opening adjustment + remote transmission and remote control are realized through the regulator of the wellhead pipeline of the gas source well;

[0077] S2: The automatic gas lift control assembly in the middle of the pipeline receives the wellhead parameters collected by the wellhead regulators of each gas-lifted well to determine the gas-lifted well;

[0078] S3: The automatic gas lift control assembly only opens the pipeline of the gas-lifted well according to the judgment result.

[0079] In the above example, by setting up a circulating gas lift pipeline network for high-pressure wells to lift low-pressure wells on the same shale gas platform, the gas lift operation from a single gas source well to multiple wells was completed, and the comprehensive and efficient utilization of the energy of the well group was achieved. The problems of low production efficiency, high operating costs, and environmental pollution caused by gas lift by nitrogen-generating trucks on existing shale gas platforms were solved, the comprehensive utilization rate of the platform well group energy was improved, the arbitrary adjustment of the tubing gas injection and casing gas injection modes was realized, and the operational convenience of circulating gas lift was improved.

[0080] Specifically, Figure 3 The diagram shows the structure of the circulating gas lift network for high-pressure wells to lift low-pressure wells, which is used to realize gas injection between production wells on the same platform to supplement the wellbore energy of the gas-lifted wells and discharge the wellbore liquid. The circulating gas lift network for high-pressure wells to lift low-pressure wells may include: tubing 1, casing 2, collection tree valve 3, tubing flow regulator 4, casing flow regulator 5, well group energy pipeline 6, production pipeline 7 and switch controller 8, wherein the tubing 1 may be a gas tree structure, connected to the casing pipeline, and positive lift or reverse lift may be selected according to actual needs; the casing pipeline 2 may also be a ... The original structure of the gas tree is connected to the oil pipeline, and positive lift or reverse lift can be selected according to actual needs; the oil pipeline flow regulator 4 and the casing flow regulator 5 can be solenoid valve structures with remote transmission and remote control functions, which are used to collect pressure and temperature data at the wellhead, and transmit the collected data to the automatic gas lift control assembly, and control the valve switch and adjust the opening according to the feedback instruction; the well group energy pipeline 6 is a newly added pipeline, which is a circulating gas lift channel pipeline. The well group energy pipeline 6 is connected to the oil pipeline or casing pipeline of the gas-lifted well through the automatic gas lift control assembly to realize gas injection and gas lift in adjacent wells.

[0081] Specifically, the above-mentioned tubing flow regulator 4 and casing flow regulator 5 can be solenoid valve structures with remote transmission and remote control functions, which are used to collect pressure and temperature data at the wellhead, transmit them to the automatic gas lift control assembly, and control the valve switch and adjust the opening according to feedback instructions.

[0082] Among them, the above-mentioned automatic gas lift control assembly can be a system for remotely controlling the intelligent switch of the solenoid valve. The selection of the gas lift process is determined in real time by the automatic gas lift control assembly, and the control assembly determines which well to open the gas injection process according to the real-time wellhead parameters of the gas-lifted well. The automatic gas lift control assembly may include: a wireless receiver, a circulating gas lift controller, a solenoid valve and other components, among which the wireless receiver can be connected to the circulating gas lift controller through a communication protocol based on RS-485+MODBUS and TCP / IP. The wireless receiver inputs the signal into the circulating gas lift controller through the communication protocol, and performs logical calculations through the circulating gas lift controller to output digital signals and analog signals. The output signal wirelessly controls the electric valve at the wellhead.

[0083] Among them, a solenoid valve for controlling the switch and opening is provided at each wellhead and control assembly to ensure that the gas lift path can be switched arbitrarily. Among them, the automatic gas lift control assembly is provided with: sensors and solenoid valves, through which flow regulation can be achieved. The solenoid valve is responsible for switching, and the sensor is responsible for collecting and transmitting data such as wellhead pressure and instantaneous gas production.

[0084] Specifically, the automatic gas lift control assembly may include:

[0085] 1) Metal housing of automatic gas lift control assembly: used to support the entire tool, with waterproof and explosion-proof functions;

[0086] 2) Automatic gas lift control circuit board, used for welding and installing discharger components to achieve the connection between various components. The circuit board is connected by screws around;

[0087] 3) Sensor power positive terminal: The sensor requires a DC6V power supply. This terminal is the positive pole, which is welded to the circuit board, and the power line is led from this terminal to the positive pole of the power supply.

[0088] 4) Sensor signal terminal: The control assembly sends a signal when it detects that the metal has moved to the set position. The signal is transmitted to the controller through the line at this terminal and is welded to the automatic gas lift control circuit board;

[0089] 5) Controller common terminal, which is the common terminal of power supply and signal, and the wires are connected to the negative pole of power supply and the negative terminal of sensor signal terminal respectively. The module is welded with the automatic gas lift control circuit board;

[0090] 6) Sensor signal processing unit, which is used to filter and process the collected signals and then output them to the signal terminal, and is integrated on the automatic gas lift control circuit board;

[0091] 7) Sensor power control unit, which mainly provides stable power supply for the sensor to prevent external voltage fluctuations from causing sensor instability. This part is integrated on the automatic gas lift control circuit board through different capacitors;

[0092] 8) Sensor signal acquisition unit, which forms a special environment through its own components and can detect whether a metal object is operating in this environment. It can effectively collect the operation signal of the plunger and integrate it on the automatic gas lift control circuit board through different electronic components.

[0093] In this case, the tubing is connected to the casing through a pipeline, and a flow regulator is set at the wellhead of the tubing and the casing. Positive lift or reverse lift can be selected according to actual needs, and the valve opening can be controlled according to the liquid accumulation and water flooding of the gas-lifted well to achieve precise control of the gas injection volume. Among them, the wellhead process of the gas source well and the gas-lifted well is the same. The gas source well is connected to multiple gas-lifted wells through the well group energy pipeline. The gas lift process is selected according to actual needs, and the flow regulator is opened at the same time to achieve inter-well gas injection on the platform. Through the established method for determining the timing of gas lift intervention and the amount of gas injection, the timing and amount of gas injection can be accurately determined. Compared with the existing vehicle-mounted gas lift, it has the advantages of rapid implementation and timely suspension, which can further save high-pressure gas sources and improve gas lift efficiency. Through the setting of the automatic gas lift control assembly, the automatic distribution and automatic switching of gas lift volume from a single gas source well to multiple wells can be realized, which improves the accuracy of gas lift control and the utilization rate of gas sources, reduces resource waste, realizes the effects of remote transmission, remote control and automatic switching, and improves the intelligence level of gas lift in shale gas collection.

[0094] The method embodiments provided in the above embodiments of the present application can be executed in a mobile terminal, a computer terminal or a similar computing device. Taking running on an electronic device as an example, Figure 4 This is a hardware structure block diagram of an electronic device for a gas lift control method for gas injection in an adjacent well provided in this application. Figure 4 As shown, the electronic device 10 may include one or more (only one is shown in the figure) processors 02 (the processor 02 may include but is not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA), a memory 04 for storing data, and a transmission module 06 for communication functions. It can be understood by those skilled in the art that Figure 4 The structure shown is only for illustration and does not limit the structure of the above electronic device. Figure 4 More or fewer components as shown, or with Figure 4 Different configurations are shown.

[0095] The memory 04 can be used to store software programs and modules of application software, such as program instructions / modules corresponding to the gas lift control method for gas injection in adjacent wells in the embodiment of the present application. The processor 02 executes various functional applications and data processing by running the software programs and modules stored in the memory 04, that is, the gas lift control method for gas injection in adjacent wells of the above-mentioned application program is realized. The memory 04 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 04 may further include a memory remotely arranged relative to the processor 02, and these remote memories may be connected to the electronic device 10 via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0096] The transmission module 06 is used to receive or send data via a network. The specific example of the above network may include a wireless network provided by a communication provider of the electronic device 10. In one example, the transmission module 06 includes a network adapter (Network Interface Controller, NIC), which can be connected to other network devices through a base station so as to communicate with the Internet. In one example, the transmission module 06 can be a radio frequency (Radio Frequency, RF) module, which is used to communicate with the Internet wirelessly.

[0097] At the software level, the gas lift control device for the above-mentioned adjacent well gas injection can be Figure 5 As shown, including:

[0098] An acquisition module 501 is used to acquire wellhead parameters of each gas-lifted well among a plurality of gas-lifted wells;

[0099] A determination module 502 is used to determine whether there is a gas-lifted well whose wellhead parameter is lower than a preset threshold value according to the wellhead parameters of each gas-lifted well among the plurality of gas-lifted wells;

[0100] A selection module 503 is used to select the gas-lifted wells whose wellhead parameters are lower than a preset threshold as the selected gas-lifted wells;

[0101] The control module 504 is used to inject gas into the selected gas-lift well through the gas source well to achieve gas injection and gas lift of the selected gas-lift well.

[0102] In one embodiment, the wellhead parameters may include but are not limited to at least one of the following: changes in gas well production and the liquid carrying capacity of the gas well, wherein the changes in gas well production may include but are not limited to at least one of the following: changes in the daily production of the gas well, changes in the instantaneous gas production of the gas well, and the liquid carrying capacity of the gas well may include but is not limited to at least one of the following: casing pressure, shut-in oil casing pressure difference, and critical liquid carrying flow rate of the gas well.

[0103] In one embodiment, the control module 504 can gradually increase the opening of the solenoid valve of the first tubing flow regulator set at the tubing pipeline of the selected gas lift well or the second tubing flow regulator set at the casing pipeline during the process of injecting gas into the selected gas lift well through the gas source well to increase the gas injection volume; determine the gas pressure required for normal production of the selected gas lift well; determine whether the selected gas lift well reaches the gas pressure required for normal production; and when it is determined that the required gas pressure is reached, adjust the opening of the solenoid valve of the first tubing flow regulator set at the tubing pipeline of the selected gas lift well or the second tubing flow regulator set at the casing pipeline to 0 to stop gas injection.

[0104] In one embodiment, determining the gas pressure required for normal production of the selected gas-lifted well may include: obtaining the shut-in casing pressure difference of the selected gas-lifted well; calculating the amount of liquid accumulated in the wellbore based on the shut-in casing pressure difference; determining the bottomhole flow pressure required for lifting the liquid based on the amount of liquid accumulated in the wellbore; determining the wellhead pressure based on the bottomhole flow pressure, and using the determined wellhead pressure as the gas pressure required for normal production of the selected gas-lifted well.

[0105] The embodiments of the present application also provide a specific implementation of an electronic device capable of implementing all the steps in the gas lift control method for gas injection in adjacent wells in the above embodiments, and the electronic device specifically includes the following contents: a processor, a memory, a communication interface, and a bus; wherein the processor, the memory, and the communication interface communicate with each other through the bus; the processor is used to call a computer program in the memory, and when the processor executes the computer program, all the steps in the gas lift control method for gas injection in adjacent wells in the above embodiments are implemented. For example, when the processor executes the computer program, the following steps are implemented:

[0106] Step 1: obtaining wellhead parameters of each gas-lifted well among multiple gas-lifted wells;

[0107] Step 2: determining whether there is a gas-lifted well whose wellhead parameter is lower than a preset threshold value according to the wellhead parameters of each gas-lifted well among the plurality of gas-lifted wells;

[0108] Step 3: The gas-lifted wells whose wellhead parameters are lower than the preset threshold are selected as the gas-lifted wells;

[0109] Step 4: injecting gas into the selected gas-lift well through the gas source well to achieve gas injection and gas lift of the selected gas-lift well.

[0110] The embodiments of the present application also provide a computer-readable storage medium capable of implementing all the steps of the gas lift control method for gas injection in adjacent wells in the above embodiments. The computer-readable storage medium stores a computer program. When the computer program is executed by a processor, all the steps of the gas lift control method for gas injection in adjacent wells in the above embodiments are implemented. For example, when the processor executes the computer program, the following steps are implemented:

[0111] Step 1: obtaining wellhead parameters of each gas-lifted well among multiple gas-lifted wells;

[0112] Step 2: determining whether there is a gas-lifted well whose wellhead parameter is lower than a preset threshold value according to the wellhead parameters of each gas-lifted well among the plurality of gas-lifted wells;

[0113] Step 3: The gas-lifted wells whose wellhead parameters are lower than the preset threshold are selected as the gas-lifted wells;

[0114] Step 4: injecting gas into the selected gas-lift well through the gas source well to achieve gas injection and gas lift of the selected gas-lift well.

[0115] From the above description, it can be seen that the embodiment of the present application realizes gas injection and gas lift of the selected gas lift well by externally connecting the automatic gas lift control assembly to the selected gas lift well among the multiple gas lift wells, and injecting gas from the gas source well to the oil pipe or casing pipe of the gas source well through the oil pipe or casing pipe of the gas source well, thereby realizing gas injection and gas lift of the selected gas lift well. The above scheme realizes the purpose of gas injection in adjacent wells and gas injection from high-pressure wells to low-pressure wells, solves the technical problems of low efficiency and high cost of existing gas injection and gas lift, and achieves the technical effect of effectively reducing the cost of gas injection and gas lift and improving gas injection efficiency.

[0116] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the hardware + program embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0117] The above is a description of a specific embodiment of the specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0118] Although the present application provides method operation steps as described in the embodiments or flowcharts, more or fewer operation steps may be included based on conventional or non-creative labor. The order of steps listed in the embodiments is only one way of executing the order of many steps and does not represent the only execution order. When the actual device or client product is executed, it can be executed in the order of the method shown in the embodiments or the drawings or in parallel (for example, in a parallel processor or multi-threaded processing environment).

[0119] Although the present specification embodiment provides the method operation steps as described in the embodiment or flow chart, more or less operation steps may be included based on conventional or non-creative means. The order of steps listed in the embodiment is only one way in the order of execution of many steps, and does not represent a unique execution order. When the device or terminal product in practice is executed, it can be executed in sequence or in parallel (such as a parallel processor or a multi-threaded processing environment, or even a distributed data processing environment) according to the method shown in the embodiment or the accompanying drawings. The term "include", "comprise" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, product or equipment including a series of elements not only includes those elements, but also includes other elements not clearly listed, or also includes elements inherent to such process, method, product or equipment. In the absence of more restrictions, it is not excluded that there are other identical or equivalent elements in the process, method, product or equipment including the elements.

[0120] For the convenience of description, the above devices are described in various modules according to their functions. Of course, when implementing the embodiments of this specification, the functions of each module can be implemented in the same or more software and / or hardware, or the module implementing the same function can be implemented by a combination of multiple sub-modules or sub-units. The device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0121] Those skilled in the art also know that, in addition to implementing the controller in a purely computer-readable program code, the controller can be made to implement the same function in the form of logic gates, switches, application-specific integrated circuits, programmable logic controllers, and embedded microcontrollers by logically programming the method steps. Therefore, such a controller can be considered as a hardware component, and the devices for implementing various functions included therein can also be considered as structures within the hardware component. Or even, the devices for implementing various functions can be considered as both software modules for implementing the method and structures within the hardware component.

[0122] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0123] Those skilled in the art will appreciate that the embodiments of this specification may be provided as methods, systems or computer program products. Therefore, the embodiments of this specification may take the form of complete hardware embodiments, complete software embodiments or embodiments combining software and hardware. Moreover, the embodiments of this specification may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0124] The present specification embodiments may be described in the general context of computer-executable instructions executed by a computer, such as program modules. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform specific tasks or implement specific abstract data types. The present specification embodiments may also be practiced in distributed computing environments where tasks are performed by remote processing devices connected through a communication network. In a distributed computing environment, program modules may be located in local and remote computer storage media, including storage devices.

[0125] Each embodiment in this specification is described in a progressive manner, and the same and similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment. In the description of this specification, the description of the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of this specification. In this specification, the schematic representation of the above terms does not necessarily target the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, in the absence of contradiction, a person skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0126] The above is only an example of the embodiment of the present specification and is not intended to limit the embodiment of the present specification. For those skilled in the art, the embodiment of the present specification may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiment of the present specification shall be included in the scope of the claims of the embodiment of the present specification.

Claims

1. A circulating gas lift network, characterized in that: include: Gas source well, multiple gas-lifted wells, automatic gas-lift control assembly, well group energy pipelines, including: The gas source well is provided with an oil pipe and a casing pipe; The gas-lifted well is provided with an oil pipe and a casing pipe; The energy pipeline of the well group is connected to the gas source well, and is externally connected to the selected gas-lifted well among the multiple gas-lifted wells through the automatic gas lift control assembly. Gas is injected from the gas source well into the oil pipe or casing pipe of the selected gas-lifted well through the oil pipe or casing pipe of the gas source well, thereby realizing gas injection and gas lift of the selected gas-lifted well.

2. The circulating gas lift pipeline network according to claim 1, characterized in that: The automatic gas lift control assembly is provided with: a wireless receiver, a circulating gas lift controller, and a solenoid valve, wherein: The wireless receiver is used to receive the wellhead parameters of each gas-lifted wellhead; The circulating gas lift controller is connected to the wireless receiver and is used to determine the selected gas lift wells and the opening of the corresponding solenoid valves according to the wellhead parameters of each gas lift well; The solenoid valve is connected to the circulating gas lift controller and is used to control the opening degree under the control of the circulating gas lift controller to achieve control of the gas injection flow rate.

3. The circulating gas lift network according to claim 1, characterized in that: A first oil pipe flow regulator is provided at the oil pipe of the gas-lifted well, and a second oil pipe flow regulator is provided at the casing pipe of the gas-lifted well, wherein the first oil pipe flow regulator and the second oil pipe flow regulator are solenoid valve structures with remote transmission and remote control functions, which are used to collect pressure data and temperature data at the wellhead, and transmit the collected pressure data and temperature data to the automatic gas lift control assembly, and are also used to control the switch and opening of the solenoid valve according to the feedback instructions of the automatic gas lift control assembly.

4. The circulating gas lift pipeline network according to claim 1, characterized in that: The oil pipe pipeline of the gas source well is connected to the oil pipe pipeline of the gas-lifted well through the well group energy pipeline, or the casing pipeline of the gas source well is connected to the casing pipeline of the gas-lifted well through the well group energy pipeline.

5. The circulating gas lift pipeline network according to claim 1, characterized in that: The oil pipe pipeline of the gas source well is a gas tree structure, which is communicated with the casing pipeline of the gas source well. The oil pipe pipeline of the gas-lifted well is a gas tree structure, which is communicated with the casing pipeline of the gas-lifted well.

6. A gas lift control method for gas injection into adjacent wells based on the circulating gas lift pipeline network according to any one of claims 1 to 5, characterized in that: include: Acquire wellhead parameters of each gas-lifted well among a plurality of gas-lifted wells; According to the wellhead parameters of each of the plurality of gas-lifted wells, determining whether there is a gas-lifted well whose wellhead parameter is lower than a preset threshold; The gas-lifted wells whose wellhead parameters are lower than a preset threshold are regarded as the selected gas-lifted wells; Gas is injected into the selected gas-lift well through the gas source well to achieve gas injection and gas lift of the selected gas-lift well.

7. The method according to claim 6, characterized in that The wellhead parameters include at least one of the following: changes in gas well production and gas well liquid carrying capacity, wherein the changes in gas well production include at least one of the following: changes in daily production of the gas well, changes in instantaneous gas production of the gas well, and the gas well liquid carrying capacity includes at least one of the following: casing pressure, shut-in oil casing pressure difference, and critical liquid carrying flow rate of the gas well.

8. The method according to claim 6, characterized in that The process of injecting gas into the selected gas lift well through the gas source well includes: Gradually increasing the opening of the electromagnetic valve of the first tubing flow regulator provided at the tubing pipeline of the selected gas lift well or the second tubing flow regulator provided at the casing pipeline to increase the gas injection volume; Determining the gas pressure required for normal production of the selected gas lift well; Determining whether the selected gas-lift well reaches the gas pressure required for normal production; When it is determined that the required gas pressure is reached, the opening of the solenoid valve of the first tubing flow regulator or the second tubing flow regulator provided at the casing pipeline of the selected gas lift well is adjusted to 0 to stop gas injection.

9. The method according to claim 8, characterized in that Determining the gas pressure required for normal production of the selected gas lift well includes: Obtaining the shut-in oil casing pressure difference of the selected gas-lifted well; Calculating the amount of liquid accumulated in the wellbore according to the shut-in oil-casing pressure difference; Determine the bottom hole flow pressure required for lifting the liquid according to the amount of liquid accumulated in the wellbore; The wellhead pressure is determined according to the bottom hole flow pressure, and the determined wellhead pressure is used as the gas pressure required for normal production of the selected gas lift well.

10. A computer-readable storage medium having a computer program / instruction stored thereon, characterized in that: When the computer program / instructions are executed by a processor, the steps of the method according to any one of claims 6 to 9 are implemented.

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