Underground wireless layered water injection treatment method, device and equipment and storage medium

Abstract

The invention discloses an underground wireless layered water injection treatment method, device and equipment and a storage medium. The method comprises the following steps: determining current water injection layer data of a current water injection layer section to which an underground water distributor belongs; a first valve unit in the current underground water distributor is closed, the first valve unit is used for generating different water injection flows in the water injection layer section by conducting gradual adjustment on different opening degrees continuously and repeatedly in a one-way mode, and the water injection flow change triggered by opening degree adjustment each time is smaller than a first flow change threshold value; and pressure pulse data corresponding to the current water injection layer data are sent to a wellhead communication controller through the switching action of a second valve unit in the current underground water distributor at the two specified opening degrees, and the water injection flow change triggered when the second valve unit is switched at the two specified opening degrees every time is larger than a second flow change threshold value. According to the technical scheme, through combination of the water distribution water nozzle and the communication water nozzle, fine water injection of wireless communication is achieved, and the water injection efficiency of wireless communication is improved.

Description

Technical Field

[0001] This invention relates to the field of oilfield stratified water injection technology, and in particular to a downhole wireless stratified water injection treatment method, apparatus, equipment and storage medium. Background Technology

[0003] Oilfields are characterized by multi-layered and heterogeneous structures. Indiscriminate water injection can lead to single-layer surges. Therefore, stratified water injection is widely adopted and is a key and effective means to improve waterflood recovery. To further enhance the effectiveness of stratified water injection, a cable-controlled approach can be used to achieve continuous monitoring of downhole stratification parameters and automatic control of stratification flow rates. However, cable-controlled systems require pre-installed cables outside the tubing to transmit data to the surface, resulting in complex construction, high costs, and limited applicability. Summary of the Invention

[0004] This invention provides a method, apparatus, electronic device, and storage medium for downhole wireless stratified water injection. It changes the current practice of using a single water nozzle for communication and water distributor strategy adjustment to a combination of two water nozzles: a water distribution nozzle and a communication nozzle. By combining the water distribution nozzle and the communication nozzle, the problem of low efficiency in wireless communication in water injection wells is solved, thereby improving the water injection efficiency and user experience of wireless stratified water injection.

[0005] According to one aspect of the present invention, a downhole wireless stratified water injection treatment method is provided, applied to a downhole wireless stratified water injection treatment device, wherein the downhole wireless stratified water injection treatment device is disposed in each layer of a water injection well; the method includes:

[0006] Determine the current injection layer data of the current injection layer segment to which the current downhole water distributor belongs;

[0007] The first valve unit in the current downhole water distributor is closed. The first valve unit is used to gradually adjust to different opening degrees in one direction multiple times to generate different water injection flow rates in the water injection layer. The change in water injection flow rate triggered by each opening degree adjustment is less than the first flow rate change threshold.

[0008] The pressure pulse data corresponding to the current water injection layer data is sent to the wellhead communication controller by the switching action of the second valve unit in the current downhole water distributor at two specified opening degrees. The pressure pulse data is used to describe the tubing pressure pulse change generated by the second valve unit in the current downhole water distributor. The pressure pulse data is characterized by the tubing pressure change transmitted to the wellhead pressure fluctuation change. The water injection flow rate change triggered by the second valve unit switching at two specified opening degrees each time is greater than the second flow rate change threshold. The first flow rate change threshold is much smaller than the second flow rate change threshold.

[0009] According to another aspect of the present invention, a downhole wireless stratified water injection treatment device is provided, configured in a downhole wireless stratified water injection treatment equipment, wherein the downhole wireless stratified water injection treatment equipment is disposed in each layer of the injection well; the device includes:

[0010] The data determination module is used to determine the current injection layer data of the current injection layer segment to which the current downhole water distributor belongs;

[0011] The first valve control module is used to close the first valve unit in the current downhole water distributor. The first valve unit is used to gradually adjust to different opening degrees in one direction multiple times to generate different water injection flow rates in the water injection layer. The change in water injection flow rate triggered by each opening degree adjustment is less than the first flow rate change threshold.

[0012] The second valve control module is used to send pressure pulse data corresponding to the current water injection layer data to the wellhead communication controller through the switching action of the second valve unit in the current downhole water distributor at two specified opening degrees. The pressure pulse data is used to describe the tubing pressure pulse change generated by the second valve unit in the current downhole water distributor. The pressure pulse data is characterized by the tubing pressure change transmitted to the wellhead pressure fluctuation change. The water injection flow rate change triggered by the second valve unit switching at two specified opening degrees each time is greater than the second flow rate change threshold, and the first flow rate change threshold is much smaller than the second flow rate change threshold.

[0013] According to another aspect of the present invention, an electronic device is provided, the electronic device comprising:

[0014] At least one processor; and

[0015] A memory communicatively connected to the at least one processor; wherein,

[0016] The memory stores a computer program that can be executed by the at least one processor, which enables the at least one processor to perform the downhole wireless stratified water injection treatment method according to any embodiment of the present invention.

[0017] According to another aspect of the present invention, a computer-readable storage medium is provided, the computer-readable storage medium storing computer instructions for causing a processor to execute and implement the downhole wireless stratified water injection method according to any embodiment of the present invention.

[0018] The technical solution of this invention changes the current practice of using a single water tap for both communication and water distribution to a combination of two water taps: a water distribution tap and a communication tap. By combining the water distribution tap and the communication tap, the problem of low efficiency in wireless communication of water injection wells is solved, thereby improving the water injection efficiency and user experience of wireless stratified water injection.

[0019] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a flowchart of a downhole wireless stratified water injection treatment method provided by an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the core water distributor provided according to an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of a conventional layered water injection process provided by an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the parallel structure of an electric water distribution nozzle and a pulse switch nozzle in a downhole water distributor according to an embodiment of the present invention;

[0025] Figure 5 This is a specific communication workflow diagram provided according to an embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the structure of a downhole wireless stratified water injection treatment device according to an embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram of the structure of an electronic device that implements the downhole wireless stratified water injection treatment method according to an embodiment of the present invention. Detailed Implementation

[0028] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0029] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0030] Figure 1 This invention provides a flowchart of a downhole wireless stratified water injection method, applicable to downhole wireless stratified water injection situations. The method can be executed by a downhole wireless stratified water injection device, which can be implemented in hardware and / or software and can be configured in any electronic device with network communication capabilities. Figure 1 As shown, the method includes:

[0031] S110. Determine the current water injection layer data of the current water injection layer segment to which the current downhole water distributor belongs.

[0032] In this embodiment, taking water-driven oilfield development as an example, the downhole water distributor is a specialized downhole tool used for quantitative water injection into each oil layer during stratified water injection. See [link to relevant documentation]. Figure 2 The diagram shows the core water distributor structure, which consists of a lower connector, a water distribution body, an electric water nozzle, an adapter, a pulse switch, and an upper connector. The two sets of water nozzles are connected in parallel inside the water distributor. Water enters from the right side and enters the formation through the electric water nozzle and the pulse switch nozzle. The arrows indicate the direction of entry and exit. The upper connector connects to the upper oil pipe, and the lower connector connects to the lower oil pipe. The electric water nozzle is used for water distribution and water volume adjustment. The pulse switch is used for communication and can be opened within 1.5 seconds.

[0033] See Figure 3A schematic diagram of a conventional layered water injection process is shown, in which the injection well contains n layers, each equipped with a packer and a distributor. The packer is a device used between layers in the well, primarily for isolating the producing layer or the target layer to prevent interference between fluids and pressures.

[0034] As an optional but not limited implementation, the current water injection layer data includes the water injection pressure and water injection flow rate of the current water injection layer to which the current downhole water distributor belongs.

[0035] In this embodiment of the application, it should be noted that the current water injection layer data includes the water injection pressure and water injection flow rate of the target layer. Subsequently, two-way communication between the surface and the well will be carried out based on the two values ​​of water injection pressure and water injection flow rate.

[0036] As an optional but not limited implementation method, determining the injection layer data of the injection layer to which the downhole water distributor belongs includes the following steps A1-A2:

[0037] Step A1: Receive the water injection layer data query command sent by the wellhead communication controller through the current downhole water distributor.

[0038] Step A2: If a response to the water injection layer data query command is detected in the current downhole water distributor, the current water injection layer data of the current water injection layer segment to which the current downhole water distributor belongs is determined.

[0039] In this embodiment, it should be noted that each downhole water distributor is equipped with a signal receiving function capable of receiving data commands sent by the surface wellhead communication controller. Each water distributor receives the same signal. The controller compresses the command data for the target injection layer into a pulse signal and sends it to the water distributors of each layer. The water distributors receive the command data containing the target injection layer. If the current injection layer is the same as the target injection layer, the downhole water distributor for the current layer responds to the command, thus determining the specific injection layer and indicating that the current injection layer is the target injection layer. If the current injection layer is different from the target injection layer, the downhole water distributor for the current layer does not respond and remains unchanged, indicating that the current injection layer is not the target injection layer.

[0040] As an optional but not limited implementation, before determining the current injection layer data of the current injection layer segment to which the current downhole water distributor belongs, the following steps B1-B2 are also included:

[0041] Step B1: Decode the received water injection layer data query command on the current downhole water distributor.

[0042] Step B2: If the decoding result indicates that the current water injection layer data of the current water injection layer segment to which the current downhole water distributor belongs should be transmitted, then it is determined that the current downhole water distributor should respond to the water injection layer data query command.

[0043] In this embodiment, it should be noted that the technical solution is a wavecode-based wireless technology. Surface wellhead parameters are transmitted wirelessly to the downhole, and downhole parameters are transmitted wirelessly to the surface. Each downhole water distributor is equipped with a decoder capable of decoding the received pulse signals. If the decoding result includes the target injection layer parameters, the downhole water distributor for the current target injection layer responds, opening the target layer's water nozzle, and the surface controller transmits water to the target injection layer.

[0044] S120. Close the first valve unit in the current downhole water distributor. The first valve unit is used to gradually adjust to different opening degrees in one direction multiple times to generate different water injection flow rates in the water injection layer. The change in water injection flow rate triggered by each opening degree adjustment is less than the first flow rate change threshold.

[0045] In this embodiment, it should be noted that each downhole water distributor has two nozzles: an electrically operated nozzle and a pulse-switch nozzle. The first valve unit refers to the electrically operated nozzle, and the opening degree refers to the valve opening angle. In water-driven oilfield development, the adjustment speed of the wireless wavecode water distributor nozzle is required to ensure more stable water flow adjustment and achieve precise water injection. Therefore, the electrically operated nozzle in this technology can control the continuously adjustable opening angle from 0-100%, thus covering any positive rational number water injection flow rate range. It is understood that each water injection adjustment of the electrically operated nozzle at different opening angles results in a small change in angle and a relatively smooth change in the initial water injection flow rate.

[0046] S130. The pressure pulse data corresponding to the current water injection layer data is sent to the wellhead communication controller through the switching action of the second valve unit in the current downhole water distributor at two specified opening degrees. The pressure pulse data is used to describe the tubing pressure pulse change generated by the second valve unit in the current downhole water distributor. The pressure pulse data is characterized by the tubing pressure change transmitted to the wellhead pressure fluctuation change. The water injection flow rate change triggered by the second valve unit switching at two specified opening degrees each time is greater than the second flow rate change threshold. The first flow rate change threshold is much smaller than the second flow rate change threshold.

[0047] In this embodiment, it should be noted that the second valve unit refers to a pulse-switched water nozzle. In water-driven oilfield development, communication requires rapid nozzle switching action, short stroke, and quick generation of pressure pulses. Therefore, in this technology, the pulse-switched water nozzle only specifies two opening degrees: valve open and valve closed. This is a non-continuous angle adjustment, similar to the opening and closing state of a solenoid valve. When it is necessary to feed downhole signals back to the surface controller, the electric water distribution nozzle closes, and the communication nozzle completes a rapid switching action. At this time, the second water injection flow rate changes significantly, generating pressure pulse data. It is understood that the first flow rate change threshold range is small, the second flow rate change threshold range is large, and the first flow rate change threshold is much smaller than the second flow rate change threshold.

[0048] As an optional but not limited implementation, the first pressure change corresponding to the first valve unit is much smaller than the second pressure change corresponding to the second valve unit. The first pressure change is represented by the pressure fluctuation change amplitude generated at the wellhead by the first water injection volume change. The first water injection volume change is the water injection flow rate change in the water injection layer triggered by each opening adjustment when the first valve unit is unidirectionally and continuously adjusted to different opening degrees multiple times. The second pressure change is represented by the pressure fluctuation change amplitude generated at the wellhead by the second water injection volume change. The second water injection volume change is the water injection flow rate change in the water injection layer triggered by the switching action between the two specified opening degrees when the second valve unit switches between the two specified opening degrees.

[0049] In this embodiment, it should be noted that the water distribution nozzle adjusts slowly and has a stable flow rate, resulting in a gradual change in the injection flow rate. In contrast, the pulse switch nozzle adjusts quickly and has a rapid flow rate, leading to a significant change in the injection flow rate. The first pressure change is the pressure value generated by the change in the injection flow rate during water distribution, while the second pressure change is the pressure value generated by the change in the injection flow rate during communication. Therefore, the first pressure change is much smaller than the second pressure change. The pressure change pulse signal generated downhole is transmitted to the wellhead on the surface, displaying the pressure fluctuation amplitude. It is understood that the amplitude of the first pressure fluctuation is much smaller than the amplitude of the second pressure fluctuation.

[0050] As an optional but not limited implementation, a downhole water distributor is configured for each water injection zone. The first valve unit and the second valve unit in the downhole water distributor are connected in parallel to the downhole tubing of the water injection zone to which the downhole water distributor belongs. When the first valve unit is open, the second valve unit is closed; when the first valve unit is closed, the second valve unit is open.

[0051] In the embodiments of this application, see Figure 4The diagram illustrates a parallel connection between the electric water distribution nozzle and the pulse switch nozzle in the downhole water distributor. Each injection layer has such a dual-nozzle parallel structure. During water distribution, the electric water distribution nozzle is open, while the pulse switch nozzle is closed. For communication, the water distribution nozzle is closed, and the pulse switch nozzle completes an open / close action, enabling wireless communication. It should be noted that even if the downhole quick switch fails to open properly, water can still be injected normally through the nozzles.

[0052] As an optional but not limited implementation, the first adjustment stroke corresponding to the first valve unit is much larger than the second adjustment stroke corresponding to the second valve unit. The first adjustment stroke is the adjustment stroke required to make the first valve unit meet the preset conduction condition by unidirectionally and continuously adjusting to different opening degrees multiple times. The second adjustment stroke is the adjustment stroke required to make the second valve unit meet the preset conduction condition after switching between two opening degrees.

[0053] In this embodiment, the valve adjustment stroke refers to the distance the valve opening angle moves from one position to another. It should be noted that the electric water distribution faucet becomes fully conductive after being adjusted to its maximum opening degree through multiple unidirectional adjustments, while the pulse electric faucet becomes fully conductive after being adjusted between two opening and closing degrees.

[0054] As an optional but not limited implementation, after sending the pressure pulse data corresponding to the current water injection layer data to the wellhead communication controller through the switching action of the second valve unit in the current downhole water distributor at two specified opening degrees, the following steps C1-C2 are also included:

[0055] Step C1: Close the second valve unit in the current downhole water distributor.

[0056] Step C2: Open the first valve unit in the current downhole water distributor, and gradually adjust the opening degree of the first valve unit according to the current injection layer data cached before closing the first valve unit in the current downhole water distributor, so that the current injection layer segment to which the current downhole water distributor belongs is restored to the injection pressure and injection flow rate corresponding to the current injection layer data.

[0057] In this embodiment, during the interaction process, after the surface wellhead communication controller receives the pressure pulse data generated by the change in flow rate of the pulse switch nozzle in the injection layer, the wellhead controller closes the pulse switch nozzle, controls the electric water distribution nozzle to open upon receiving the command, and adjusts the opening angle of the water distribution nozzle valve. Prior to this, the injection pressure and flow rate data of the target injection layer have been cached in the memory. The injection flow rate is controlled to be injected smoothly until the target injection layer data recovers to the cached data value. See [link to relevant documentation]. Figure 5The specific communication process is illustrated.

[0058] This invention discloses a method for wireless stratified water injection in wells. The method includes: determining the current injection layer data of the current injection layer segment to which the current well water distributor belongs; closing a first valve unit in the current well water distributor, the first valve unit being used to generate different injection flow rates in the injection layer segment by unidirectional, continuous, and multiple adjustments to different opening degrees, with each opening degree adjustment triggering an injection flow rate change less than a first flow rate change threshold; and sending pressure pulse data corresponding to the current injection layer data to the wellhead communication controller through a second valve unit in the current well water distributor switching between two specified opening degrees, with each switching action of the second valve unit triggering an injection flow rate change greater than a second flow rate change threshold. The technical solution of this invention, moving from using a single water nozzle for communication and water distributor strategy adjustment to a combination of two water nozzles—a water distribution nozzle and a communication nozzle—solves the problem of low wireless communication efficiency in water injection wells, improving the injection efficiency and user experience of wireless stratified water injection.

[0059] Figure 6 This is a schematic diagram of a downhole wireless stratified water injection treatment device provided in an embodiment of the present invention. Figure 6 As shown, the device includes:

[0060] The data module 610 is used to determine the current injection layer data of the current injection layer segment to which the current downhole water distributor belongs;

[0061] The first valve control module 620 is used to close the first valve unit in the current downhole water distributor. The first valve unit is used to gradually adjust to different opening degrees in one direction multiple times to generate different water injection flow rates in the water injection layer. The change in water injection flow rate triggered by each opening degree adjustment is less than the first flow rate change threshold.

[0062] The second valve control module 630 is used to send pressure pulse data corresponding to the current water injection layer data to the wellhead communication controller through the switching action of the second valve unit in the current downhole water distributor at two specified opening degrees. The pressure pulse data is used to describe the tubing pressure pulse change generated by the second valve unit in the current downhole water distributor. The pressure pulse data is characterized by the tubing pressure change transmitted to the wellhead pressure fluctuation change. The water injection flow rate change triggered by the second valve unit switching at two specified opening degrees each time is greater than the second flow rate change threshold, and the first flow rate change threshold is much smaller than the second flow rate change threshold.

[0063] Optionally, determining the data module 610 includes the following steps A1-A2:

[0064] Step A1: Receive the water injection layer data query command sent by the wellhead communication controller through the current downhole water distributor.

[0065] Step A2: If a response to the water injection layer data query command is detected in the current downhole water distributor, the current water injection layer data of the current water injection layer segment to which the current downhole water distributor belongs is determined.

[0066] Optionally, before determining the current injection layer data of the current injection layer segment to which the current downhole water distributor belongs, the following steps B1-B2 are also included:

[0067] Step B1: Decode the received water injection layer data query command on the current downhole water distributor.

[0068] Step B2: If the decoding result indicates that the current water injection layer data of the current water injection layer segment to which the current downhole water distributor belongs should be transmitted, then it is determined that the current downhole water distributor should respond to the water injection layer data query command.

[0069] Optionally, the first pressure change corresponding to the first valve unit is much smaller than the second pressure change corresponding to the second valve unit. The first pressure change is represented by the pressure fluctuation change amplitude generated at the wellhead by the first water injection volume change. The first water injection volume change is the water injection flow rate change in the water injection layer triggered by each opening adjustment when the first valve unit is unidirectionally and continuously adjusted to different opening degrees multiple times. The second pressure change is represented by the pressure fluctuation change amplitude generated at the wellhead by the second water injection volume change. The second water injection volume change is the water injection flow rate change in the water injection layer triggered by the switching action between the two specified opening degrees when the second valve unit switches between the two specified opening degrees.

[0070] Optionally, a downhole water distributor is provided for each water injection zone. The first valve unit and the second valve unit in the downhole water distributor are connected in parallel to the downhole tubing of the water injection zone to which the downhole water distributor belongs. When the first valve unit is open, the second valve unit is closed; when the first valve unit is closed, the second valve unit is open.

[0071] Optionally, the first adjustment stroke corresponding to the first valve unit is much larger than the second adjustment stroke corresponding to the second valve unit. The first adjustment stroke is the adjustment stroke required to make the first valve unit meet the preset conduction condition by unidirectionally and continuously adjusting to different opening degrees multiple times. The second adjustment stroke is the adjustment stroke required to make the second valve unit meet the preset conduction condition after switching between two opening degrees.

[0072] Optionally, after sending the pressure pulse data corresponding to the current injection layer data to the wellhead communication controller through the switching action of the second valve unit in the current downhole water distributor at two specified opening degrees, the following steps C1-C2 are further included:

[0073] Step C1: Close the second valve unit in the current downhole water distributor.

[0074] Step C2: Open the first valve unit in the current downhole water distributor, and gradually adjust the opening degree of the first valve unit according to the current injection layer data cached before closing the first valve unit in the current downhole water distributor, so that the current injection layer segment to which the current downhole water distributor belongs is restored to the injection pressure and injection flow rate corresponding to the current injection layer data.

[0075] The downhole wireless stratified water injection treatment device provided in the embodiments of the present invention can perform the downhole wireless stratified water injection treatment method provided in any of the embodiments of the present invention, and has the corresponding functions and beneficial effects of performing the downhole wireless stratified water injection treatment method. For detailed process, please refer to the relevant operations of the downhole wireless stratified water injection treatment method in the foregoing embodiments.

[0076] Figure 7 A schematic diagram of an electronic device 10 that can be used to implement embodiments of the present invention is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processors, cellular phones, smartphones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the invention described and / or claimed herein.

[0077] like Figure 7 As shown, the electronic device 10 includes at least one processor 11 and a memory, such as a read-only memory (ROM) 12 or a random access memory (RAM) 13, communicatively connected to the at least one processor 11. The memory stores computer programs executable by the at least one processor. The processor 11 can perform various appropriate actions and processes based on the computer program stored in the ROM 12 or loaded from storage unit 18 into the RAM 13. The RAM 13 may also store various programs and data required for the operation of the electronic device 10. The processor 11, ROM 12, and RAM 13 are interconnected via a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0078] Multiple components in electronic device 10 are connected to I / O interface 15, including: input unit 16, such as keyboard, mouse, etc.; output unit 17, such as various types of displays, speakers, etc.; storage unit 18, such as disk, optical disk, etc.; and communication unit 19, such as network card, modem, wireless transceiver, etc. Communication unit 19 allows electronic device 10 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0079] Processor 11 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. Processor 11 performs the various methods and processes described above, such as method downhole stratified water injection.

[0080] In some embodiments, the method of downhole stratified water injection can be implemented as a computer program tangibly contained in a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program can be loaded and / or mounted on electronic device 10 via ROM 12 and / or communication unit 19. When the computer program is loaded into RAM 13 and executed by processor 11, one or more steps of the method of downhole stratified water injection described above can be performed. Alternatively, in other embodiments, processor 11 can be configured to perform the method of downhole stratified water injection by any other suitable means (e.g., by means of firmware).

[0081] Various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), systems-on-a-chip (SoCs), payload-programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the at least one output device.

[0082] Computer programs used to implement the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when executed by the processor, the computer programs cause the functions / operations specified in the flowcharts and / or block diagrams to be performed. The computer programs may be executed entirely on a machine, partially on a machine, or as a standalone software package, partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0083] In the context of this invention, a computer-readable storage medium can be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, apparatus, or device. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination thereof. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0084] To provide interaction with a user, the systems and techniques described herein can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user provides input to the electronic device. Other types of devices can also be used to provide interaction with the user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including sound input, voice input, or tactile input).

[0085] The systems and technologies described herein can be implemented in computing systems that include backend components (e.g., as data servers), or computing systems that include middleware components (e.g., application servers), or computing systems that include frontend components (e.g., user computers with graphical user interfaces or web browsers through which users can interact with implementations of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected via digital data communication of any form or medium (e.g., communication networks). Examples of communication networks include local area networks (LANs), wide area networks (WANs), blockchain networks, and the Internet.

[0086] A computing system can include clients and servers. Clients and servers are generally located far apart and typically interact through communication networks. The client-server relationship is created by computer programs running on the respective computers and having a client-server relationship with each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a hosting product within the cloud computing service system to address the shortcomings of traditional physical hosts and VPS services, such as high management difficulty and weak business scalability.

[0087] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0088] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A method for downhole wireless stratified water injection, characterized in that, The downhole tubing contains multiple water injection layers, and each water injection layer is equipped with a downhole water distributor. The method includes: Determine the current injection layer data of the current injection layer segment to which the current downhole water distributor belongs; The first valve unit in the current downhole water distributor is closed. The first valve unit is used to gradually adjust to different opening degrees in one direction multiple times to generate different water injection flow rates in the water injection layer. The change in water injection flow rate triggered by each opening degree adjustment is less than the first flow rate change threshold. The pressure pulse data corresponding to the current water injection layer data is sent to the wellhead communication controller by the switching action of the second valve unit in the current downhole water distributor at two specified opening degrees. The pressure pulse data is used to describe the tubing pressure pulse change generated by the second valve unit in the current downhole water distributor. The pressure pulse data is characterized by the tubing pressure change transmitted to the wellhead pressure fluctuation change. The water injection flow rate change triggered by the second valve unit switching at two specified opening degrees each time is greater than the second flow rate change threshold. The first flow rate change threshold is much smaller than the second flow rate change threshold.

2. The method according to claim 1, characterized in that, Determine the injection layer data of the injection zone to which the downhole water distributor belongs, including: Receive water injection layer data query instructions sent by the wellhead communication controller through the current downhole water distributor; If a response is detected to a query command for water injection layer data specified in the current downhole water distributor, the current water injection layer data of the current water injection layer segment to which the current downhole water distributor belongs is determined.

3. The method according to claim 2, characterized in that, Before determining the current injection layer data of the current injection layer segment to which the current downhole water distributor belongs, the following steps are also included: The current downhole water distributor decodes the received water injection layer data query command; If the decoding result indicates that the current injection layer data of the current injection layer segment to which the current downhole water distributor belongs should be transmitted, then it is determined that the current downhole water distributor should respond to the injection layer data query command.

4. The method according to claim 1, characterized in that, The first pressure change corresponding to the first valve unit is much smaller than the second pressure change corresponding to the second valve unit. The first pressure change is represented by the pressure fluctuation change amplitude generated at the wellhead by the first water injection volume change. The first water injection volume change is the water injection flow rate change in the water injection layer triggered by each opening adjustment when the first valve unit is unidirectionally and continuously adjusted to different opening degrees multiple times. The second pressure change is represented by the pressure fluctuation change amplitude generated at the wellhead by the second water injection volume change. The second water injection volume change is the water injection flow rate change in the water injection layer triggered by the switching action between the two specified opening degrees when the second valve unit switches between the two specified opening degrees.

5. The method according to claim 1, characterized in that, Each water injection zone is equipped with a downhole water distributor. The first valve unit and the second valve unit in the downhole water distributor are connected in parallel to the downhole tubing of the water injection zone to which the downhole water distributor belongs. When the first valve unit is open, the second valve unit is closed; when the first valve unit is closed, the second valve unit is open.

6. The method according to claim 1, characterized in that, The first adjustment stroke corresponding to the first valve unit is much larger than the second adjustment stroke corresponding to the second valve unit. The first adjustment stroke is the adjustment stroke required to make the first valve unit meet the preset conduction condition by unidirectionally and continuously adjusting to different opening degrees multiple times. The second adjustment stroke is the adjustment stroke required for the second valve unit to meet the preset conduction condition after switching between two opening degrees.

7. The method according to claim 1, characterized in that, After the second valve unit in the current downhole water distributor sends the pressure pulse data corresponding to the current injection layer data to the wellhead communication controller through the switching action of the two specified opening degrees, it also includes: Close the second valve unit in the current downhole water distributor; The first valve unit in the current downhole water distributor is opened, and the opening degree of the first valve unit is gradually adjusted according to the current water injection layer data cached before the first valve unit in the current downhole water distributor is closed, so that the current water injection layer segment to which the current downhole water distributor belongs is restored to the water injection pressure and water injection flow rate corresponding to the current water injection layer data.

8. The method according to any one of claims 1 to 7, characterized in that, The current injection layer data includes the injection pressure and injection flow rate of the current injection layer to which the current downhole water distributor belongs.

9. A downhole wireless stratified water injection treatment device, characterized in that, include: The data determination module is used to determine the current injection layer data of the current injection layer segment to which the current downhole water distributor belongs; The first valve control module is used to close the first valve unit in the current downhole water distributor. The first valve unit is used to gradually adjust to different opening degrees in one direction multiple times to generate different water injection flow rates in the water injection layer. The change in water injection flow rate triggered by each opening degree adjustment is less than the first flow rate change threshold. The second valve control module is used to send pressure pulse data corresponding to the current water injection layer data to the wellhead communication controller through the switching action of the second valve unit in the current downhole water distributor at two specified opening degrees. The pressure pulse data is used to describe the tubing pressure pulse change generated by the second valve unit in the current downhole water distributor. The pressure pulse data is characterized by the tubing pressure change transmitted to the wellhead pressure fluctuation change. The water injection flow rate change triggered by the second valve unit switching at two specified opening degrees each time is greater than the second flow rate change threshold, and the first flow rate change threshold is much smaller than the second flow rate change threshold.

10. An electronic device, characterized in that, The electronic device includes: At least one processor; and A memory communicatively connected to the at least one processor; wherein, The memory stores a computer program that can be executed by the at least one processor, the computer program being executed by the at least one processor to enable the at least one processor to perform the downhole wireless stratified water injection treatment method according to any one of claims 1-8.

11. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that cause a processor to execute the downhole wireless stratified water injection method according to any one of claims 1-8.

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