Water distribution and adjustment method for oil-containing water injection well and related equipment

Abstract

The application discloses a kind of oil-containing water injection well water distribution measurement and related equipment, it is related to oil and gas production field, mainly to solve the current method of water distribution measurement and regulation for oil-containing water injection well is not accurate enough.The method comprises: obtaining the change value of surface flowmeter and pressure gauge, wherein the change value is used to judge the leakage point condition of water injection string;In the case that the water injection string has no leakage point, the water injection pressure value of each injection interval water distributor corresponding wellhead is obtained respectively, wherein the water distributor is in the full open and single water injection state of water nozzle;Based on the maximum value in the water injection pressure value of each injection interval water distributor corresponding wellhead, single-layer regulation is carried out.The application is used for the process of water distribution measurement and regulation of oil-containing water injection well.

Description

Technical Field

[0001] This invention relates to the field of oil and gas production, and in particular to a method for measuring and adjusting water distribution in oil-bearing water injection wells and related equipment. Background Technology

[0002] In the mid-to-late stages of water-injection oilfield development, uneven water absorption occurs in each layer during the vertical multi-segment water injection process, due to differences in permeability, leading to uneven utilization of reservoir reserves. To address this, layered water injection technology has emerged. After years of development, the main water injection processes in domestic oilfields are still bridge-type concentric and bridge-type eccentric. The main characteristic of these two water well water injection processes is continuous cable measurement and adjustment, enabling simultaneous measurement and adjustment, and real-time data reading. Bridge-type concentric and bridge-type eccentric water injection technologies involve wellbore water injection tools. Their injection principle utilizes water injection packers to isolate layers, and water distributors to inject water into each layer.

[0003] To achieve accurate water volume allocation for each injection target layer, ground-based electric measurement and adjustment are mainly relied upon. The key to the accuracy of water volume allocation is that the inner wall of the flow test channel and the inner wall of the oil pipe must be free of oil and impurities. However, it is difficult to achieve the above ideal conditions in the well shaft of the water injection site. Once oil and impurities are present, the water flow channel in the flow test channel becomes smaller, causing the flow velocity measured by the probe to change, which in turn leads to inaccurate instantaneous flow. Summary of the Invention

[0004] In view of the above problems, the present invention provides a method and related equipment for measuring and adjusting water distribution in oil-bearing water injection wells, the main purpose of which is to solve the problem that the current methods for measuring and adjusting water distribution in oil-bearing water injection wells are not accurate enough.

[0005] To solve at least one of the above-mentioned technical problems, in a first aspect, the present invention provides a method for measuring and adjusting water distribution in oil-bearing water injection wells, the method comprising:

[0006] Obtain the change values ​​of the ground flow meter and pressure meter, wherein the change values ​​are used to determine the leakage point of the water injection pipe string;

[0007] Under the condition that there are no leaks in the water injection string, the water injection pressure value of the wellhead corresponding to the water distributor of each injection section is obtained respectively, wherein the water distributor is in a state of full opening of the water nozzle and single water injection.

[0008] Single-layer allocation is performed based on the maximum value of the injection pressure at the wellhead corresponding to each injection layer distributor.

[0009] Optionally, obtaining the change values ​​of the surface flow meter and pressure meter includes:

[0010] With all water taps closed, obtain the changes in the flow rate and pressure gauge readings on the ground.

[0011] Optionally, obtaining the change values ​​of the surface flow meter and pressure meter includes:

[0012] If the instantaneous flow rate of the ground flow meter is zero and the pressure values ​​of the first pressure gauge and the second pressure gauge are consistent, it is determined that there is no leak in the water injection pipe string.

[0013] If the instantaneous flow rate value of the ground flow meter is not zero, and the pressure value of the first pressure gauge is less than that of the second pressure gauge, then a leak is determined to exist in the water injection pipe string.

[0014] The first pressure gauge is located at the rear end of the flow meter and is used to measure the pressure at the wellhead of the water injection pipeline, while the second pressure gauge is located at the front end of the flow meter and is used to measure the pressure of the incoming water main.

[0015] Optionally, in the case that there are no leaks in the injection tubing, obtaining the injection pressure value at the wellhead corresponding to the water distributor of each injection section includes:

[0016] Once the injection pressure value of the wellhead corresponding to the water distributor of the target injection zone is obtained, all water nozzles of the water distributors except for the target injection zone are closed.

[0017] Optionally, in the case that there are no leaks in the injection tubing, obtaining the injection pressure value at the wellhead corresponding to the water distributor of each injection section includes:

[0018] With the injection pressure value of the wellhead corresponding to the water distributor of the target injection layer obtained, the surface flow meter is adjusted based on the daily water injection volume;

[0019] After the ground flow meter has been stable for a preset time, the pressure value of the first pressure gauge is obtained;

[0020] The water injection pressure value is determined when the pressure value of the first pressure gauge is stable.

[0021] Optionally, the single-layer allocation based on the maximum value of the injection pressure values ​​at the wellheads corresponding to the water distributors of each injection layer includes:

[0022] The water injection pressure is adjusted in a single layer based on the maximum value of the water injection pressure at the wellhead corresponding to each water injection section distributor, so that the water injection pressure at the wellhead corresponding to each water injection section distributor is always the maximum value.

[0023] Optionally, the single-layer allocation based on the maximum value of the injection pressure values ​​at the wellheads corresponding to the water distributors of each injection layer includes:

[0024] Adjust the water distributor of the injection section with the highest water injection pressure value so that the water nozzle of the water distributor of the injection section with the highest water injection pressure value is fully open and the water injection pressure value is the maximum value;

[0025] When the water distributor of the injection section with the largest injection pressure value has been adjusted, the opening of the nozzle of the target injection section water distributor is further controlled to meet the total water distribution of the current and adjusted injection sections, and the injection pressure value of the target injection section is the maximum value. The target injection section water distributor is the injection section water distributor other than the injection section water distributor with the largest injection pressure value.

[0026] Adjust the target injection section water distributors until all injection section water distributors have been adjusted.

[0027] Secondly, embodiments of the present invention also provide a water distribution measurement and adjustment device for oil-bearing water injection wells, comprising:

[0028] The first acquisition unit is used to acquire the change values ​​of the ground flow meter and pressure meter, wherein the change values ​​are used to determine the leakage of the water injection pipe string.

[0029] The second acquisition unit is used to acquire the water injection pressure value of the wellhead corresponding to the water distributor of each injection section when there is no leakage in the water injection tubing, wherein the water distributor is in a state of full opening of the water nozzle and single water injection.

[0030] The allocation unit is used to allocate water to a single layer based on the maximum value of the water injection pressure value of the wellhead corresponding to each water distributor of each injection layer.

[0031] To achieve the above objectives, a third aspect of the present invention includes a computer-readable storage medium comprising a stored program, wherein, when the program is executed by a processor, the steps of the above-described method for measuring and adjusting water distribution in an oil-bearing water injection well are implemented.

[0032] To achieve the above objectives, a fourth aspect of the present invention includes an electronic device comprising at least one processor and at least one memory connected to the processor; wherein the processor is configured to invoke program instructions in the memory to execute the steps of the above-described method for measuring and adjusting water distribution in oil-bearing injection wells.

[0033] By employing the above technical solution, the water distribution measurement and adjustment method and related equipment for oil-bearing water injection wells provided by this invention address the problem of insufficient accuracy in current methods for water distribution measurement and adjustment of oil-bearing water injection wells. This invention, by closing all water distributor nozzles, determines the presence of leaks in the injection tubing based on changes in surface flow and pressure gauge readings. If no leaks are found, the invention calculates the corresponding wellhead injection pressure for each injection layer under single-injection conditions with all nozzles fully open. Using the calculated highest single-layer injection pressure as a fixed standard, single-layer adjustments are performed to ensure that the wellhead pressure remains a fixed highest injection pressure value after each layer's adjustment. Based on the testing principle of existing integrated electric measurement and adjustment instruments, this solution abandons the flow measurement function and instead utilizes the surface flow and pressure gauges of the water well, achieving precise measurement and adjustment of water wells under complex conditions such as oil-bearing wells.

[0034] Correspondingly, the oil-containing water injection well water distribution measurement and adjustment device, equipment, and computer-readable storage medium provided in the embodiments of the present invention also have the above-mentioned technical effects.

[0035] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and in order to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0036] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0037] Figure 1 A schematic flowchart of a water distribution measurement and adjustment method for an oil-bearing water injection well provided by an embodiment of the present invention is shown;

[0038] Figure 2 This image shows a wellhead returning heavy oil during a water well operation, as provided in an embodiment of the present invention.

[0039] Figure 3 This image shows a wellhead returning thin oil during a water well operation, as provided in an embodiment of the present invention.

[0040] Figure 4 The image shown is of the integrated electric flow measurement device provided in this embodiment of the invention before it is blocked by oil in the water well tubing.

[0041] Figure 5 The image shown is of the integrated electric flow measurement device provided in this embodiment of the invention after it was blocked by oil in the water well tubing.

[0042] Figure 6 This diagram illustrates a bridge-type concentric three-layer stratified water injection well according to an embodiment of the present invention.

[0043] Figure 7 This diagram illustrates the composition of a water distribution measurement and adjustment device for an oil-bearing water injection well according to an embodiment of the present invention.

[0044] Figure 8 This diagram illustrates the composition of an electronic device for measuring and adjusting water distribution in an oil-bearing water injection well, as provided in an embodiment of the present invention. Detailed Implementation

[0045] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0046] To address the inaccuracy of current methods for water distribution measurement and adjustment in oil-bearing water injection wells, this invention provides a method for water distribution measurement and adjustment in oil-bearing water injection wells, such as... Figure 1 As shown, taking a bridge-type concentric three-layer water injection well as an example, the water injection layers are defined from top to bottom as the upper layer, middle layer, and lower layer. The method includes:

[0047] S101. Obtain the change values ​​of the ground flow meter and pressure meter, wherein the change values ​​are used to determine the leakage point of the water injection pipe string;

[0048] The leakage point information is used to characterize whether there is a leakage point in the water injection tubing.

[0049] The steps in S101 above also include S1011 and S1012:

[0050] S1011. With all water taps closed, obtain the change values ​​of the ground flow meter and pressure gauge.

[0051] For example, this application uses an integrated electric measuring and adjusting instrument to close the water nozzles of the three concentric water distributors downhole and observe the changes in the values ​​of the surface flow meter and pressure gauge.

[0052] S1012. If the instantaneous flow rate of the ground flow meter is zero and the pressure values ​​of the first pressure gauge and the second pressure gauge are consistent, it is determined that there is no leak in the water injection pipe string.

[0053] If the instantaneous flow rate value of the ground flow meter is not zero, and the pressure value of the first pressure gauge is less than that of the second pressure gauge, then a leak is determined to exist in the water injection pipe string.

[0054] The first pressure gauge is located at the rear end of the flow meter and is used to measure the pressure at the wellhead of the water injection pipeline, while the second pressure gauge is located at the front end of the flow meter and is used to measure the pressure of the incoming water main.

[0055] Furthermore, if the instantaneous flow rate of the ground flow meter is 0, and the pressure gauge value at the back end of the flow meter is consistent with the pressure gauge value at the front end of the flow meter, it proves that there is no leak in the water injection pipe string, and the next step can be carried out.

[0056] If the instantaneous flow rate of the ground flow meter is not 0, and the pressure gauge value at the back end of the flow meter is less than the pressure gauge value at the front end of the flow meter, it proves that there is a leak in the water injection pipe column, which needs to be rectified and adjusted before retesting.

[0057] It can be understood that the first pressure gauge is set at the rear end of the flow meter to measure the pressure at the wellhead of the water injection pipeline, which is referred to as oil pressure on site, and the first pressure gauge can also be called an oil pressure gauge; the second pressure gauge is set at the front end of the flow meter to measure the incoming water pressure value, which can also be understood as the incoming water main pressure.

[0058] S102. If there are no leaks in the water injection string, obtain the water injection pressure value of the wellhead corresponding to the water distributor of each injection layer, wherein the water distributor is in a state of full opening of the water nozzle and single water injection.

[0059] In the step of obtaining the water injection pressure value of the wellhead corresponding to each water distributor in each injection layer, it should be noted that the water injection pressure value of the wellhead corresponding to each water distributor in each injection layer is obtained when injecting water at the corresponding injection volume.

[0060] The steps in S102 above also include S1021 and S1022:

[0061] S1021. After obtaining the water injection pressure value of the wellhead corresponding to the water distributor of the target injection layer, close all water nozzles of the water distributors except for the target injection layer.

[0062] S1022. After obtaining the injection pressure value of the wellhead corresponding to the water distributor of the target injection layer, adjust the surface flow meter based on the daily water injection volume.

[0063] After the ground flow meter has been stable for a preset time, the pressure value of the first pressure gauge is obtained;

[0064] The water injection pressure value is determined when the pressure value of the first pressure gauge is stable.

[0065] Based on the above scheme, the injection pressure value of the first pressure gauge at the wellhead of each injection section water distributor is obtained under the condition of single injection and full opening of the water nozzle.

[0066] For example, taking the determination of the injection pressure value of the first pressure gauge at the wellhead corresponding to the lower water distributor in the state of single water injection and full opening of the water nozzle as an example, when the water nozzles of the upper and middle concentric water distributors are completely closed, the water nozzle of the lower water distributor is fully opened, the ground flow meter is adjusted to the daily water injection volume (the flow meter displays the instantaneous flow rate, the unit is: cubic meters / hour, and its value is equal to the daily water injection volume divided by 24), and after stabilizing for a preset time, the pressure value of the first pressure gauge is read. If the pressure is not stable, the observation and waiting time needs to be extended, and finally the injection pressure value is determined as the injection pressure value.

[0067] It can be understood that the above preset time can be half an hour, or it can be determined according to the specific circumstances, and no specific limitation is made here.

[0068] Similarly, after closing the upper and lower layers, calculate the corresponding injection pressure value for the middle layer; after closing the middle and lower layers, calculate the corresponding injection pressure value for the upper layer.

[0069] S103. Single-layer allocation is performed based on the maximum value of the water injection pressure value of the wellhead corresponding to each water distributor of each injection layer.

[0070] The steps in S103 above also include S1031 and S1032:

[0071] S1031. Based on the maximum value of the water injection pressure value of the wellhead corresponding to each water distribution unit in each injection layer, single-layer adjustment is performed so that the water injection pressure value of the wellhead corresponding to each water distribution unit in each injection layer is always the maximum value.

[0072] S1032. Adjust the water distributor of the injection section with the highest injection pressure value so that the water nozzle opening of the water distributor of the injection section with the highest injection pressure value is fully open and the injection pressure value is the maximum value; when the water distributor of the injection section with the highest injection pressure value has been adjusted, further control the water nozzle opening of the target injection section water distributor to meet the total water distribution volume of the current and already adjusted injection sections, and the injection pressure value of the target injection section is the maximum value, wherein the target injection section water distributor is the injection section water distributor other than the injection section water distributor with the highest injection pressure value; adjust the target injection section water distributor until all injection section water distributors have been adjusted.

[0073] Based on the above scheme, the highest single-layer injection pressure value obtained by the above scheme is used as a fixed standard for single-layer allocation to ensure that the wellhead pressure after each layer allocation is always a fixed highest injection pressure value.

[0074] For example, assume the upper layer receives 30 cubic meters of water per day at a pressure of 9 MPa; the middle layer receives 40 cubic meters per day at a pressure of 7 MPa; and the lower layer receives 50 cubic meters per day at a pressure of 11 MPa. Since the lower layer has the highest injection pressure at 11 MPa, this is used as the standard for single-layer distribution. First, fully open the water nozzles of the lower layer distributor (while the upper and middle layer distributors are fully closed). At this point, when the ground flow meter is adjusted to a daily water injection volume of 50 cubic meters, the corresponding oil pressure gauge reading should be 11 MPa. If the middle layer is to be adjusted next (while the upper layer distributor nozzles are fully closed and the lower layer distributor nozzles are fully open), the ground flow meter needs to be adjusted to 90 cubic meters (50 + 40 = 90), and the opening and closing of the middle layer distributor nozzles should be fine-tuned until the ground oil pressure gauge reading is 11 MPa and remains stable. Finally, the upper layer water distribution is tested and adjusted (at this point, the lower layer water distributor nozzles are fully open, while the middle layer water distributor nozzles remain unchanged). The ground flow meter needs to be adjusted to 120 cubic meters (50+40+30=120), and the opening and closing of the upper layer water distributor nozzles should be finely adjusted until the ground oil pressure gauge reading is 11 MPa and remains stable. At this point, the water distribution testing and adjustment for all three layers is complete.

[0075] In the above scheme, for the layer with the highest injection pressure value, the water distributor nozzles should be fully open during testing and adjustment, while the nozzles of the water distributors for other layers should be less than 100%. That is, the nozzle opening of the water distributor for the layer with the highest pressure during a single injection should be 100%, while the nozzle opening of the other water distributors should be less than 100%. Specifically, the opening of the nozzles of the other water distributors should be adjusted to ensure that the surface flow meter value equals the total water volume of the layer being adjusted and the layer that has already been adjusted, ultimately achieving a wellhead pressure gauge value equal to the maximum pressure value.

[0076] By employing the above technical solution, the water distribution and adjustment method for oil-bearing water injection wells provided by this invention addresses the problem of insufficient accuracy in current methods for water distribution and adjustment of oil-bearing water injection wells. This invention closes all water distributor nozzles and determines whether there are leaks in the injection tubing based on changes in the values ​​of the surface flow meter and pressure gauge. If no leaks are found, the invention calculates the corresponding wellhead injection pressure for each injection layer's water distributor under single injection with all nozzles fully open. Using the calculated highest single-layer injection pressure value as a fixed standard, single-layer adjustments are performed to ensure that the wellhead pressure remains a fixed highest injection pressure value after each layer's adjustment. Based on the testing principle of existing integrated electric adjustment instruments, this solution abandons the use of their flow measurement function and instead comprehensively utilizes the surface flow meter and pressure gauge of the water well, achieving precise adjustment of water wells under complex conditions such as oil-bearing wells.

[0077] The above-mentioned scheme achieves high accuracy in single-layer water distribution in oil-bearing stratified water injection wells, with water volume errors controlled within ±10%, meeting geological development requirements. It is suitable for water wells prone to sand discharge, oil sludge return, poor water quality, or poor-quality injection tubing, where suspended oil and impurities easily form within the injection tubing. By using surface flow meters and pressure gauges to distribute water volume across underground injection layers, the scheme overcomes the impact of the complex well environment on the accuracy of the electric flow meter. Furthermore, the use of a simple electric downhole nozzle ensures high success rate and low maintenance costs, making it a promising solution for widespread application.

[0078] Furthermore, as a response to the above Figure 1 In addition to the implementation of the method shown, this embodiment of the invention also provides a water distribution measurement and adjustment device for oil-bearing water injection wells, used for the above-mentioned... Figure 1 The method shown is implemented accordingly. This device embodiment corresponds to the foregoing method embodiment. For ease of reading, this device embodiment will not repeat the details of the foregoing method embodiment, but it should be clear that the device in this embodiment can implement all the contents of the foregoing method embodiment. Figure 7 As shown, the device includes: a first acquisition unit 21, a second acquisition unit 22, and a distribution unit 23, wherein...

[0079] The first acquisition unit 21 is used to acquire the change values ​​of the ground flow meter and pressure meter, wherein the change values ​​are used to determine the leakage of the water injection pipe string.

[0080] The second acquisition unit 22 is used to acquire the water injection pressure value of the wellhead corresponding to the water distributor of each injection layer when there is no leakage in the water injection tubing, wherein the water distributor is in a state of full opening of the water nozzle and single water injection.

[0081] The allocation unit 23 is used to allocate water to a single layer based on the maximum value of the water injection pressure value of the wellhead corresponding to each water distribution unit of each injection layer.

[0082] The processor contains a kernel, which retrieves the corresponding program units from memory. One or more kernels can be configured, and by adjusting kernel parameters, a method for measuring and adjusting water distribution in oil-bearing water injection wells can be implemented, addressing the current problem of insufficient accuracy in water distribution measurement and adjustment methods for oil-bearing water injection wells.

[0083] This invention provides a computer-readable storage medium including a stored program that, when executed by a processor, implements the method for measuring and adjusting water distribution in an oil-bearing water injection well.

[0084] This invention provides a processor for running a program, wherein the program executes the method for measuring and adjusting water distribution in an oil-bearing water injection well.

[0085] This invention provides an electronic device, which includes at least one processor and at least one memory connected to the processor; wherein the processor is used to call program instructions in the memory to execute the water distribution measurement and adjustment method for oil-bearing water injection wells as described above.

[0086] This invention provides an electronic device 30, such as... Figure 8 As shown, the electronic device includes at least one processor 301, and at least one memory 302 and bus 303 connected to the processor; wherein, the processor 301 and the memory 302 communicate with each other through the bus 303; the processor 301 is used to call program instructions in the memory to execute the above-mentioned method for measuring and adjusting water distribution in oil-bearing water injection wells.

[0087] The smart electronic devices mentioned in this article can be PCs, tablets, mobile phones, etc.

[0088] This application also provides a computer program product that, when executed on a process management electronic device, is suitable for executing a program that initializes the above-described steps of the oil-containing water injection well water distribution measurement and adjustment method.

[0089] It should be noted that the descriptions of each embodiment in the above embodiments have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0090] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0091] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create a machine for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0092] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0093] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0094] This application also provides a computer program product, which includes computer software instructions that, when executed on a processing device, cause the processing device to perform actions such as... Figure 1 The control flow of the memory in the corresponding embodiment.

[0095] A computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the flow or function according to the embodiments of this application is generated. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium may be any available medium that a computer can store or a data storage device such as a server or data center that integrates one or more available media. The available medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid-state disk (SSD)).

[0096] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0097] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, or indirect coupling or communication connection between apparatuses or units, and may be electrical, mechanical, or other forms.

[0098] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0099] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0100] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0101] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A method for measuring and adjusting water distribution in oil-bearing water injection wells, characterized in that, include: Obtain the change values ​​of the ground flow meter and pressure meter, wherein the change values ​​are used to determine the leakage point of the water injection pipe string; Under the condition that there are no leaks in the water injection string, the water injection pressure value of the wellhead corresponding to the water distributor of each injection section is obtained respectively, wherein the water distributor is in a state of full opening of the water nozzle and single water injection. Single-layer allocation is performed based on the maximum value of the injection pressure at the wellhead corresponding to each injection layer distributor.

2. The method according to claim 1, characterized in that, The acquisition of the change values ​​of the surface flow meter and pressure meter includes: With all water taps closed, obtain the changes in the flow rate and pressure gauge readings on the ground.

3. The method according to claim 1, characterized in that, The acquisition of the change values ​​of the surface flow meter and pressure meter includes: If the instantaneous flow rate of the ground flow meter is zero and the pressure values ​​of the first pressure gauge and the second pressure gauge are consistent, it is determined that there is no leak in the water injection pipe string. If the instantaneous flow rate value of the ground flow meter is not zero, and the pressure value of the first pressure gauge is less than that of the second pressure gauge, then a leak is determined to exist in the water injection pipe string. The first pressure gauge is located at the rear end of the flow meter and is used to measure the pressure at the wellhead of the water injection pipeline, while the second pressure gauge is located at the front end of the flow meter and is used to measure the pressure of the incoming water main.

4. The method according to claim 1, characterized in that, Assuming there are no leaks in the injection tubing, the injection pressure values ​​at the wellheads corresponding to the water distributors in each injection section are obtained, including: Once the injection pressure value of the wellhead corresponding to the water distributor of the target injection zone is obtained, all water nozzles of the water distributors except for the target injection zone are closed.

5. The method according to claim 1, characterized in that, Assuming there are no leaks in the injection tubing, the injection pressure values ​​at the wellheads corresponding to the water distributors in each injection section are obtained, including: With the injection pressure value of the wellhead corresponding to the water distributor of the target injection layer obtained, the surface flow meter is adjusted based on the daily water injection volume; After the ground flow meter has been stable for a preset time, the pressure value of the first pressure gauge is obtained; The water injection pressure value is determined when the pressure value of the first pressure gauge is stable.

6. The method according to claim 1, characterized in that, The single-layer allocation based on the maximum value of the injection pressure values ​​at the wellheads corresponding to the water distributors of each injection layer includes: The water injection pressure is adjusted in a single layer based on the maximum value of the water injection pressure at the wellhead corresponding to each water injection section distributor, so that the water injection pressure at the wellhead corresponding to each water injection section distributor is always the maximum value.

7. The method according to claim 6, characterized in that, The single-layer allocation based on the maximum value of the injection pressure values ​​at the wellheads corresponding to the water distributors of each injection layer includes: Adjust the water distributor of the injection section with the highest water injection pressure value so that the water nozzle of the water distributor of the injection section with the highest water injection pressure value is fully open and the water injection pressure value is the maximum value; When the water distributor of the injection section with the largest injection pressure value has been adjusted, the opening of the nozzle of the target injection section water distributor is further controlled to meet the total water distribution of the current and adjusted injection sections, and the injection pressure value of the target injection section is the maximum value. The target injection section water distributor is the injection section water distributor other than the injection section water distributor with the largest injection pressure value. Adjust the target injection section water distributors until all injection section water distributors have been adjusted.

8. A water distribution measurement and adjustment device for oil-bearing water injection wells, characterized in that, Also includes: The first acquisition unit is used to acquire the change values ​​of the ground flow meter and pressure meter, wherein the change values ​​are used to determine the leakage of the water injection pipe string. The second acquisition unit is used to acquire the water injection pressure value of the wellhead corresponding to the water distributor of each injection section when there is no leakage in the water injection tubing, wherein the water distributor is in a state of full opening of the water nozzle and single water injection. The allocation unit is used to allocate water to a single layer based on the maximum value of the water injection pressure value of the wellhead corresponding to each water distributor of each injection layer.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored program, wherein, when the program is executed by a processor, it implements the steps of the method for measuring and adjusting water distribution in an oil-bearing water injection well as described in any one of claims 1 to 7.

10. An electronic device, characterized in that, The electronic device includes at least one processor and at least one memory connected to the processor; wherein the processor is used to call program instructions in the memory to execute the steps of the method for measuring and adjusting water distribution in an oil-bearing water injection well as described in any one of claims 1 to 7.

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