Method for controlling oil well intermittent opening through well site photovoltaic power generation and related equipment

Abstract

The invention discloses a method for controlling oil well intermittent opening by utilizing well site photovoltaic power generation, which comprises the following steps of: firstly, judging the operation time to ensure that each intermittent opening well must ensure the operation duration so as to ensure the liquid production capacity, and then determining the direct relationship between the operation power of the intermittent opening well and the photovoltaic power generation on the basis of the distributed photovoltaic characteristics. The photovoltaic generating capacity is all used for current well site consumption as much as possible, peak shifting is achieved as much as possible according to the starting and stopping requirements of intermittent well opening, well opening and closing actions in a well site are only executed once within 10 minutes, and on the premise that the oil well yield is guaranteed, photovoltaic generating control over oil well intermittent well opening production is achieved; the expected internal yield can be greatly improved, pumping is started when power generation is much, pumping is stopped when power generation is little or power generation is not performed on the premise that the oil well yield is guaranteed, and low-carbon even zero-carbon production of the oil well is achieved by utilizing photovoltaic power generation energy to the maximum extent in the aspect of guaranteeing benefit maximization.

Description

Technical Field

[0001] The invention relates to the technical field of oil production technology, and in particular to a method for controlling the spacing of oil wells by utilizing photovoltaic power generation at a well site and related equipment. Background Art

[0002] Photovoltaic is a power generation system that converts solar radiation into electrical energy. It is a clean, safe, and renewable energy source, and is currently one of the mainstream technologies for achieving the dual carbon goals. Smart intermittent oil production is a technology that uses digital means to achieve automatic intermittent oil production in oil wells, improving pump efficiency and system efficiency. The construction of distributed photovoltaics in smart intermittent well sites can significantly increase the expected internal rate of return compared to single photovoltaic construction.

[0003] However, there is no effective method to combine the two technologies in combination with their respective characteristics to realize photovoltaic power generation to control intermittent production of oil wells, maximize the use of photovoltaic power generation energy, and start pumping when there is more power generation and stop pumping when there is less or no power generation under the premise of ensuring the output of the oil wells to ensure maximum benefits. When the existing intermittent wells are set up separately, photovoltaic energy cannot be well utilized and effective energy utilization cannot be achieved. Summary of the invention

[0004] The purpose of the present invention is to provide a method and related equipment for controlling the inter-well opening of oil wells by using photovoltaic power generation at the well site, so as to overcome the problem that the photovoltaic energy cannot be well utilized and the effective utilization of energy cannot be achieved when the inter-well opening is set separately in the prior art.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A method for controlling oil well inter-well opening by using photovoltaic power generation at a well site, comprising:

[0007] Obtain the operation time of the intermittent well, determine the compensation status of the intermittent well according to the operation time of the intermittent well, and perform well opening for the compensated intermittent well;

[0008] Obtain the operating power and photovoltaic power generation of the intermittent wells, and select and close the intermittent wells in operation that are not marked as to be compensated according to the operating power and photovoltaic power generation of the intermittent wells;

[0009] The power flowing into the grid is calculated based on the photovoltaic power generation and the well operation power. Based on the relationship between the power flowing into the grid and the intermittent wells, the intermittent wells to be compensated are selected for well opening.

[0010] Preferably, the intermittent well operation time is obtained every ten minutes.

[0011] Preferably, the specific method for determining whether an inter-well is in a state to be compensated is to obtain the operating time of the inter-well, and then calculate the remaining time of the inter-well from the well opening technology; if the well opening time plus the remaining time is less than or equal to the inter-well set time, mark the current well as a state to be compensated.

[0012] Preferably, the operating intermittent wells that are not marked to be compensated are closed in order of the well opening power from small to large.

[0013] Preferably, the power flowing into the grid is calculated by subtracting the intermittent well operation power from the photovoltaic power generation power.

[0014] Preferably, according to the relationship between the power input to the grid and each intermittent well, the method for selecting the intermittent well to be compensated for the well opening action is specifically:

[0015] Search for the intermittent wells in turn, find the intermittent well that is in the shut-in state and whose operating power is greater than the grid-connected power, and perform the well opening work. If no intermittent well that meets the requirements of being in the shut-in state and whose operating power is greater than the grid-connected power is found, start the intermittent well with maximum power and in the shutdown state.

[0016] Preferably, after the well opening action is performed, if all the intermittent wells are in operation and the photovoltaic power generation power is still greater than the operating power of the intermittent wells, the surplus power is uploaded to the platform.

[0017] A system for controlling the opening of oil wells by photovoltaic power generation at a well site, comprising:

[0018] Time judgment module: obtains the operation time of the intermittent well, judges the compensation status of the intermittent well according to the operation time of the intermittent well, and performs well opening for the compensated intermittent well;

[0019] Well shut-in module: obtain the operating power and photovoltaic power generation of the intermittent wells, and select and shut down the intermittent wells in operation that are not marked as to be compensated according to the operating power and photovoltaic power generation of the intermittent wells;

[0020] Well opening module: The power flowing into the grid is calculated based on the photovoltaic power generation and the well opening operation power. Based on the relationship between the power flowing into the grid and the well opening, the well opening to be compensated is selected for well opening.

[0021] A computer device comprises a memory, a processor and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, steps of a method for controlling the spacing of oil wells by using photovoltaic power generation at a well site are implemented.

[0022] A computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of a method for controlling the spacing of oil wells by using photovoltaic power generation at a well site are implemented.

[0023] Compared with the prior art, the present invention has the following beneficial effects: the present invention provides a method for controlling the inter-split of oil wells by utilizing photovoltaic power generation at the well site, firstly, the operating time is judged to ensure that each inter-split well must ensure the operating time to ensure the liquid production, and then based on the characteristics of distributed photovoltaics, the direct relationship between the operating power of the inter-split well and photovoltaic power generation is determined to ensure that all the photovoltaic power generation is used for the current well site consumption as much as possible.

[0024] Furthermore, the operating time of the intermittent wells is obtained every ten minutes to ensure that the start and stop of the intermittent wells are staggered. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A flow chart of a method for controlling the opening of oil wells by using photovoltaic power generation at a well site;

[0026] Figure 2 Detailed flow chart of the method for controlling the inter-well opening of oil wells for photovoltaic power generation at the well site;

[0027] Figure 3 The block diagram of a system for controlling the opening between oil wells by using photovoltaic power generation at the well site. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0031] In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0032] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0033] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0035] like Figure 1 As shown, the present invention provides a method for controlling the spacing of oil wells by using photovoltaic power generation at a well site, comprising:

[0036] S101 obtains the operation time of the intermittent well, determines whether it is an intermittent well in a state of waiting for compensation according to the operation time of the intermittent well, and performs well opening for the intermittent well to be compensated;

[0037] S102: obtaining the operating power and photovoltaic power generation of the intermittent wells; according to the operating power and photovoltaic power generation of the intermittent wells, if the photovoltaic power generation power is less than or equal to the operating power of the intermittent wells, closing the intermittent wells in operation that are not marked as to be compensated;

[0038] In step S103, if the photovoltaic power generation power is greater than the operating power of the intermittent well, the power flowing into the grid is calculated, and according to the relationship between the power flowing into the grid and the intermittent well, the intermittent well to be compensated is selected for opening.

[0039] Get the intermittent well operation time every ten minutes.

[0040] The specific method for determining whether an intermittent well is in a state to be compensated is to obtain the operating time of the intermittent well, and then calculate the remaining time of the intermittent well from the well opening technology. If the well opening time plus the remaining time is less than or equal to the intermittent well set time, mark the current well as a state to be compensated.

[0041] Close the operating intermittent wells that are not marked as waiting for compensation in the order of well opening power from small to large.

[0042] The power flowing into the grid is calculated as the photovoltaic power minus the intermittent well operation power.

[0043] According to the relationship between the power input to the grid and each well, the method of selecting the well to be compensated for well opening is as follows:

[0044] Search for the intermittent wells in turn, find the intermittent well that is in the shut-in state and whose operating power is greater than the grid-connected power, and perform the well opening work. If no intermittent well that meets the requirements of being in the shut-in state and whose operating power is greater than the grid-connected power is found, start the intermittent well with maximum power and in the shutdown state.

[0045] After the well opening action is performed, if all the intermittent wells are in operation and the photovoltaic power generation power is still greater than the operating power of the intermittent wells, the surplus power will be uploaded to the platform.

[0046] like Figure 2 As shown, a method for controlling the oil well opening by using photovoltaic power generation at the well site is provided, and the specific process is as follows:

[0047] Photovoltaic control interval setting conditions

[0048] Each well must be run for a sufficient length of time to ensure fluid production.

[0049] Based on the characteristics of distributed photovoltaics, we try to ensure that all photovoltaic power generation is used for current well site consumption.

[0050] The start and stop of intermittent wells should be staggered as much as possible, and the opening and closing of wells in the well site should only be performed once within 10 minutes.

[0051] Photovoltaic control interval switch logic

[0052] Assume that the average photovoltaic power generation power P for 10 minutes 光伏 , Suppose there are m oil wells in the well site, n of which are intermittent wells (n≤m). Each intermittent well is numbered in ascending order according to the average power when it is opened (1...n). The corresponding power P1...P n (P1≤P2≤...≤P n The total power of the producing wells is P 开井 .

[0053] Compensation method for time rate of well opening in interval wells

[0054] Assume that the set running time of the well is T 设定 , the time of well opening in the current cycle is T 开井 The current time is T from the end of the interval period (usually 08:00 the next day). 剩余 .

[0055] Every 10 minutes, the following judgment is performed on each well: 开井 +T 剩余 ≤T 设定 , mark the current well as the state to be compensated. Execute the well opening for the well to be compensated (if the well has been opened, no action will be taken).

[0056] Intermittent well control logic

[0057] Execute the following methods in sequence every 10 minutes:

[0058] a. Execute the time-rate compensation method for the intermittent wells, and start the intermittent wells marked as to be compensated.

[0059] b. If P 光伏 <=P 开井 , all photovoltaic power generation is used for current well field consumption, check whether there are any operating intermittent wells that are not marked as to be compensated:

[0060] If there is, shut down the running intermittent wells that are not marked for compensation. When shutting down the wells, shut them down in the order of the intermittent well power from small to large and satisfy P 光伏 <=P 开井 The wells currently in operation at the well site include wells to be compensated and wells not to be compensated but which do not meet P after being shut down. 光伏 <=P 开井 wells and normally open wells.

[0061] If it does not exist, no intervening well that can be closed is found and no action is taken.

[0062] If P 光伏 >P 开井 , calculate the power P flowing into the grid 入网 =P 光伏 -P 开井 , search for the wells 1...n in sequence, and find the wells that are shut in and whose power P i >P 入网 , then the well i is started. If well i is not found but there are still unstarted intermittent wells, the intermittent well with maximum power and in shutdown state is started.

[0063] After executing the above steps, all the interleaved wells have been operated, but P still appears 光伏 >P 开井 , the well site is marked as a photovoltaic power saturated well site, and the surplus power P富余 =P 光伏 -P 开井 Report to the platform.

[0064] Example 1. The well site has only one well and it is an intermittent well

[0065] Generally speaking, due to the minimum flow rate and the need to prevent wax scale from causing wellbore failure, there will not be a well site with only one well and that well is spaced.

[0066] In this special case, the well will start drilling when photovoltaic power generation occurs and will not be stopped until the well drilling conditions are met.

[0067] Example 2. There are wells that are open regularly and wells that are open occasionally at the well site, but P 光伏 <=P 开井

[0068] Because P 光伏 <=P 开井 , all photovoltaic power generation is used for current well field consumption, check whether there are any operating intermittent wells that are not marked as to be compensated:

[0069] If there is, shut down the running intermittent wells that are not marked for compensation. When shutting down the wells, shut them down in the order of the intermittent well power from small to large and satisfy P 光伏 <=P 开井 The wells currently in operation at the well site include wells to be compensated and wells not to be compensated but which do not meet P after being shut down. 光伏 <=P 开井 wells and normally open wells.

[0070] If it does not exist, no intervening well that can be closed is found and no action is taken.

[0071] Example 3. There are wells that are open regularly and wells that are open occasionally at the well site, but P 光伏 >P 开井

[0072] Calculate the power P flowing into the grid 入网 =P 光伏 -P 开井 , search for the wells 1...n in sequence, and find the wells that are shut in and whose power P i >P 入网 , then the well i is started. If well i is not found but there are still unstarted intermittent wells, the intermittent well with maximum power and in shutdown state is started.

[0073] like Figure 3 The invention provides a system for controlling the opening of oil wells by photovoltaic power generation at the well site, including:

[0074] Time judgment module: obtains the operation time of the intermittent well, determines whether it is an intermittent well in the state of waiting for compensation according to the operation time of the intermittent well, and executes the well opening for the intermittent well to be compensated;

[0075] Well shut-in module: obtain the operating power and photovoltaic power generation of the intermittent wells. If the photovoltaic power generation power is less than or equal to the operating power of the intermittent wells, shut down the intermittent wells that are not marked for compensation.

[0076] Well opening module: If the photovoltaic power generation power is greater than the operating power of the intermittent well, the power flowing into the grid is calculated. According to the relationship between the power flowing into the grid and the intermittent well, the intermittent well to be compensated is selected for well opening.

[0077] A terminal device is provided in one embodiment of the present invention. The terminal device of this embodiment includes: a processor, a memory, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps in the above-mentioned method embodiments are implemented. Alternatively, when the processor executes the computer program, the functions of the modules / units in the above-mentioned device embodiments are implemented.

[0078] The computer program may be divided into one or more modules / units, and the one or more modules / units are stored in the memory and executed by the processor to accomplish the present invention.

[0079] The terminal device may be a computing device such as a desktop computer, a notebook, a PDA, a cloud server, etc. The terminal device may include, but is not limited to, a processor and a memory.

[0080] The processor can be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.

[0081] The memory may be used to store the computer programs and / or modules, and the processor implements various functions of the terminal device by running or executing the computer programs and / or modules stored in the memory and calling the data stored in the memory.

[0082] If the module / unit integrated in the terminal device is implemented in the form of 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 present invention implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium. It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media do not include electric carrier signals and telecommunication signals.

[0083] Although the embodiments of the present invention are described above in conjunction with the accompanying drawings, the present invention is not limited to the above-mentioned specific embodiments and application fields, and the above-mentioned specific embodiments are only illustrative and instructive, rather than restrictive. Under the guidance of the specification, a person skilled in the art can also make many forms without departing from the scope of protection of the claims of the present invention, all of which belong to the scope of protection of the present invention.

Claims

1. A method for controlling oil well spacing using photovoltaic power generation at a well site, characterized in that: include: Obtain the operation time of the intermittent well, determine the compensation status of the intermittent well according to the operation time of the intermittent well, and perform well opening for the compensated intermittent well; Obtain the operating power and photovoltaic power generation of the intermittent wells, and select and close the intermittent wells in operation that are not marked as to be compensated according to the operating power and photovoltaic power generation of the intermittent wells; The power flowing into the grid is calculated based on the photovoltaic power generation and the well operation power. Based on the relationship between the power flowing into the grid and the intermittent wells, the intermittent wells to be compensated are selected for well opening.

2. A method for controlling oil well spacing by using photovoltaic power generation at a well site according to claim 1, characterized in that: Get the intermittent well operation time every ten minutes.

3. The method of controlling oil well spacing by using photovoltaic power generation at a well site according to claim 1, characterized in that: The specific method for determining whether an intermittent well is in a state to be compensated is to obtain the operating time of the intermittent well, and then calculate the remaining time of the intermittent well from the well opening technology. If the well opening time plus the remaining time is less than or equal to the intermittent well set time, mark the current well as a state to be compensated.

4. The method of controlling oil well spacing by using photovoltaic power generation at a well site according to claim 1, characterized in that: Close the operating intermittent wells that are not marked as waiting for compensation in the order of well opening power from small to large.

5. The method for controlling oil well spacing by using photovoltaic power generation at a well site according to claim 1, characterized in that: The power flowing into the grid is calculated as the photovoltaic power minus the intermittent well operation power.

6. The method of controlling oil well spacing by using photovoltaic power generation at a well site according to claim 1, characterized in that: According to the relationship between the power input to the grid and each intermittent well, the method of selecting the intermittent well to be compensated for the well opening action is as follows: Search for the intermittent wells in turn, find the intermittent well that is in the shut-in state and whose operating power is greater than the grid-connected power, and perform the well opening work. If no intermittent well that meets the requirements of being in the shut-in state and whose operating power is greater than the grid-connected power is found, start the intermittent well with maximum power and in the shutdown state.

7. The method of controlling oil well spacing by using photovoltaic power generation at a well site according to claim 1, characterized in that: After the well opening action is performed, if all the intermittent wells are in operation and the photovoltaic power generation power is still greater than the operating power of the intermittent wells, the surplus power will be uploaded to the platform.

8. A system for controlling the opening of oil wells by photovoltaic power generation at a well site, characterized in that: include: Time judgment module: obtains the operation time of the intermittent well, judges the compensation status of the intermittent well according to the operation time of the intermittent well, and performs well opening for the compensated intermittent well; Well shut-in module: obtain the operating power and photovoltaic power generation of the intermittent wells, and select and shut down the intermittent wells in operation that are not marked as to be compensated according to the operating power and photovoltaic power generation of the intermittent wells; Well opening module: The power flowing into the grid is calculated based on the photovoltaic power generation and the well opening operation power. Based on the relationship between the power flowing into the grid and the well opening, the well opening to be compensated is selected for well opening.

9. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of a method for controlling the spacing of oil wells by using photovoltaic power generation at a well site as described in any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of a method for controlling the spacing of oil wells by using photovoltaic power generation at a well site as described in any one of claims 1 to 7 are implemented.

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