Method and system for determining intermittent pumping system of low-liquid-production oil well based on time-of-use electricity price

Abstract

The invention relates to a method and system for determining an intermittent pumping system of a low-liquid-production oil well based on time-of-use electricity price, and belongs to the technical field of oil extraction processes. The method comprises the steps that the relation between the working fluid level and the pump efficiency and the relation between the working fluid level and the energy consumption are established based on working fluid level recovery and descending data; and a final intermittent pumping system is obtained based on the initial intermittent pumping system set and the relation between the working fluid level and the pump efficiency and energy consumption. The working fluid level recovery and descending data comprises a working fluid level ascending height and ascending time curve, an indicator diagram or electrical parameter, and a working fluid level descending height and descending time curve. The method does not depend on artificial experience, and is determined by the working fluid level recovery and decline data and the real-time electricity price, so that the production efficiency of the low-liquid-yield oil well is improved, and the operation cost is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of oil production technology, and in particular relates to a method and a system for determining an inter-pumping system for low-yield oil wells based on time-of-use electricity prices. Background Art

[0002] As oilfield development enters the middle and late stages, the number of low-yield and low-efficiency wells increases year by year. How to achieve efficient exploitation of low-yield wells has become a key issue in oilfield development. When the frequency of adjustment cannot meet the coordination of supply and drainage, intermittent pumping is an effective means to improve efficiency and reduce consumption of low-yield wells. The optimization of the traditional intermittent pumping system is mostly based on the changes in the dynamic liquid level. After the dynamic liquid level is lower than a specific value during continuous production, the well is shut down and restored for a period of time to keep the dynamic liquid level within the range, which reduces energy consumption to a certain extent, but does not fully utilize the oil well production capacity. In addition, the pumping unit may work at any time of the day, and the impact of time-of-use electricity prices is not taken into account, which increases additional electricity costs.

[0003] At present, the intermittent pumping system is often determined according to the recovery and decline of the dynamic liquid level. After a period of continuous production, the well is shut down and the recovery of the dynamic liquid level is continuously measured. When the dynamic liquid level is low, the liquid level recovers quickly. When the dynamic liquid level rises, the recovery speed slows down. Figure 1 As shown. The inflection point H1 where the dynamic liquid level no longer increases is used as the well opening height. After the well is opened, the drop of the dynamic liquid level is continuously measured, and the closing dynamic liquid level height H2 is set. The time for the dynamic liquid level to recover from H2 to H1 when the well is closed is used as the closing time T1, and the time T2 for the dynamic liquid level to drop from H1 to H2 is used as the opening production time. This traditional method determines the opening and closing dynamic liquid level height and opening and closing time of the well based on manual experience, and does not make targeted optimization for when to start pumping, resulting in high electricity costs. Summary of the invention

[0004] In response to the above problems, the present invention provides a method and system for determining the inter-pumping system for low-liquid production oil wells based on time-of-use electricity prices. The method relies on the dynamic liquid level changes and optimizes the inter-pumping system on the basis of the "peak, valley and flat" time-of-use electricity prices, thereby further reducing electricity consumption in the oil field.

[0005] The first object of the present invention is to provide a method for determining the inter-pumping system of low-yield oil wells based on time-of-use electricity prices, the method comprising:

[0006] Based on the dynamic liquid level recovery and drop data, the relationship between dynamic liquid level and pump efficiency and energy consumption is established;

[0007] Based on the initial intermittent pumping system set and the relationship between the dynamic liquid level and pump efficiency and energy consumption, the final intermittent pumping system is obtained.

[0008] In some embodiments of the present invention, the dynamic liquid level recovery and decline data include a dynamic liquid level rise height and rise time curve, a power diagram or electrical parameters, and a dynamic liquid level decline height and decline time curve.

[0009] In some embodiments of the present invention, the dynamic liquid level rise height and rise time curves are obtained by regularly measuring the dynamic liquid level height after production stabilizes and then shutting down the well or until the dynamic liquid level does not change.

[0010] In some embodiments of the present invention, the power diagram or electrical parameters are obtained by regularly testing the power diagram or electrical power consumption during a fixed period; the dynamic liquid level drop height and drop time curve are obtained by regularly measuring the dynamic liquid level height within a fixed period of time.

[0011] In some embodiments of the present invention, based on the dynamic liquid level recovery and decline data, the relationship between the dynamic liquid level and the pump efficiency and energy consumption is established by using interpolation method, fitting method or continuous flow and wellbore storage effect theoretical modeling method.

[0012] In some embodiments of the present invention, the final intermittent pumping system is obtained based on the initial intermittent pumping system set and the relationship between the dynamic liquid level and the pump efficiency and energy consumption, including:

[0013] Based on the relationship between dynamic liquid level, pump efficiency and energy consumption, the total output and electricity cost set under the dynamic liquid level change are obtained;

[0014] Based on the total output under dynamic liquid level changes, the electricity price set and the initial intermittent withdrawal system set, the final intermittent withdrawal system is obtained.

[0015] The second object of the present invention is to provide a system for determining the inter-pumping system of low-yield oil wells based on time-of-use electricity prices, the system comprising:

[0016] The relationship determination module is used to obtain the total output and electricity cost set under the dynamic liquid level change based on the relationship between the dynamic liquid level and the pump efficiency and energy consumption;

[0017] The final module is used to obtain the final intermittent pumping system based on the relationship between the dynamic liquid level and the pump efficiency, energy consumption and the initial intermittent pumping system set.

[0018] In some embodiments of the present invention, the final module includes a first submodule and a second submodule;

[0019] The first submodule is used to obtain the total output and electricity cost set under the dynamic liquid level change based on the relationship between the dynamic liquid level and the pump efficiency and energy consumption;

[0020] The second submodule is used to obtain the final intermittent extraction system based on the total output under the dynamic liquid level change, the electricity fee set and the initial intermittent extraction system set.

[0021] A third object of the present invention is to provide an electronic device, the electronic device comprising: a processor, the processor being coupled to a memory;

[0022] The memory is used to store computer programs;

[0023] The processor is used to execute the computer program stored in the memory so that the electronic device executes the method as described above.

[0024] A fourth object of the present invention is to provide a computer-readable storage medium, wherein the computer-readable storage medium stores a program or instruction, and when the program or instruction is executed on a computer, the computer executes the method as described above.

[0025] Beneficial effects of the present invention:

[0026] The present invention provides a method and system for determining the inter-pumping system of low-yield oil wells based on time-of-use electricity prices. The method and system are based on the dynamic liquid level recovery and decline data, establish the relationship between the dynamic liquid level and the pump efficiency and energy consumption, and then obtain the production and energy consumption set under the dynamic liquid level change. Combined with the time-of-use electricity price, the total production and total electricity cost under different inter-pumping systems (the total production and total electricity cost corresponding to different time segments) are calculated, and the inter-pumping system scheme with high production and low electricity cost is screened.

[0027] It can be seen that the present invention does not rely on manual experience, but is determined by dynamic liquid level recovery and decline data and real-time electricity prices, which not only improves the production efficiency of low-liquid production oil wells, but also reduces operating costs.

[0028] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 A schematic diagram of determining the intermittent pumping system according to the recovery and descending rules of the dynamic liquid level in the prior art is shown;

[0031] Figure 2 A flow chart showing a method for determining an inter-pumping system for low-liquid production oil wells based on time-of-use electricity prices according to an embodiment of the present invention is shown;

[0032] Figure 3 A dynamic liquid level variation curve diagram according to an embodiment of the present invention is shown;

[0033] Figure 4 A partial dynamometer diagram according to an embodiment of the present invention is shown;

[0034] Figure 5 A curve diagram showing the change of pump efficiency following liquid level according to an embodiment of the present invention is shown;

[0035] Figure 6 A curve diagram showing the change of power consumption with liquid level according to an embodiment of the present invention is shown;

[0036] Figure 7 A time-of-use electricity price table diagram of a certain place according to an embodiment of the present invention is shown;

[0037] Figure 8 A framework diagram of a system for determining the inter-pumping system of low-yield oil wells based on time-of-use electricity prices according to an embodiment of the present invention is shown;

[0038] Fig. 9 A framework diagram of an electronic device according to an embodiment of the present invention is shown;

[0039] In the figure:

[0040] Relationship determination module 1; final module 2; electronic device 300, processor 301, memory 302. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution 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. 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.

[0042] like Figure 2 As shown, a method for determining the inter-pumping system of low-yield oil wells based on time-of-use electricity prices according to an embodiment of the present invention includes:

[0043] Step S1, based on the dynamic liquid level recovery and decline data, establish the relationship between the dynamic liquid level and the output and energy consumption;

[0044] Step S2: Based on the initial intermittent pumping system set and the relationship between the dynamic liquid level and the pump efficiency and energy consumption, a final intermittent pumping system is obtained.

[0045] In step S1, the dynamic liquid level recovery and decline data include a dynamic liquid level rise height and rise time curve, a power diagram or electrical parameters, and a dynamic liquid level decline height and decline time curve;

[0046] The dynamic liquid level rising height and rising time curve is obtained by regularly measuring the dynamic liquid level height after production stabilizes and shutting down the well or until the dynamic liquid level does not change;

[0047] The power diagram or electrical parameter is obtained by regularly testing the power diagram or electrical power consumption during a fixed period, wherein the fixed period is the period from well opening to stabilization or slowing of the change trend;

[0048] The dynamic liquid level drop height and drop time curve are obtained by regularly measuring the dynamic liquid level height within a fixed period of time, wherein the fixed period of time is the period from well opening to stabilization or slowing of the change trend;

[0049] In the embodiment of the present invention, for example, the pumping is first stopped to restore the dynamic liquid level, and the dynamic liquid level is measured once an hour. The pumping is restarted after stopping pumping for 24 hours. The dynamic liquid level is measured to be 1320m when the pumping is started. The dynamic liquid level and the indicator diagram are measured once an hour until the dynamic liquid level is close to the pump depth. The pumping is stopped. After running for 24 hours, the dynamic liquid level is 1440 meters. The dynamic liquid level rising height and rising time curve and the dynamic liquid level falling height and falling time curve are obtained, that is, the dynamic liquid level change curve is as follows: Figure 3 As shown, the obtained partial dynamometer diagram is as follows Figure 4 As shown;

[0050] In step S1, the relationship between the dynamic liquid level and the pump efficiency and energy consumption is established based on the dynamic liquid level recovery and drop data, which is:

[0051] The pump efficiency is calculated based on the dynamometer set obtained above, and the power consumption during well opening is calculated based on the electric power curve set and converted into one day's power consumption, wherein the dynamometer set of the electric power curve corresponds to the electric power consumption obtained during the test;

[0052] Based on the dynamic liquid level change curve, pump efficiency and power consumption, the relationship between pump efficiency and dynamic liquid level, as well as the relationship between power consumption and dynamic liquid level are analyzed to form the relationship curve between pump efficiency and dynamic liquid level, and the relationship curve between power consumption and dynamic liquid level. Specifically, Figure 5 and Figure 6 As shown;

[0053] Then, the interpolation method, fitting method, theoretical modeling method or other methods are used to establish the numerical relationship between the dynamic liquid level and the pump efficiency and energy consumption;

[0054] In the embodiment of the present invention, an interpolation method is used to establish the numerical relationship between the dynamic liquid level and the pump efficiency, and between the dynamic liquid level and the power consumption. The linear interpolation method is shown in formula (1):

[0055]

[0056] In formula (1), X represents the dynamic liquid level, and Y represents the pump efficiency or power consumption.

[0057] In step S3, the final intermittent pumping system is obtained based on the initial intermittent pumping system set and the relationship between the dynamic liquid level and the pump efficiency and energy consumption, including:

[0058] Step A1, based on the relationship between the dynamic liquid level and pump efficiency and energy consumption, the total output and electricity cost set under the dynamic liquid level change are obtained;

[0059] Step A2: Based on the total output under the dynamic liquid level change, the electricity price set and the initial intermittent extraction system set, the final intermittent extraction system is obtained.

[0060] In step A1, based on the relationship between the dynamic liquid level and the pump efficiency and energy consumption, the total output and electricity cost set under the dynamic liquid level change are obtained as follows:

[0061] Based on the pump efficiency and pump theoretical displacement, the total output is obtained. The specific calculation formula is shown in formula (2):

[0062]

[0063] In formula (2), η t is the pump efficiency at time t of well opening, P I is the theoretical displacement, T is the total well opening time, P L is the total open well production;

[0064] Based on the above formula (2), combined with the relationship between the dynamic liquid level and pump efficiency, the total production set under the dynamic liquid level change can be obtained;

[0065] Based on energy consumption and time-of-use electricity price, the total electricity fee is calculated. The specific calculation formula is shown in formula (3):

[0066]

[0067] In formula (3), E t is the power consumption at time t, S t is the electricity cost corresponding to time t, C E is the total electricity cost;

[0068] Based on the above formula (3), combined with the relationship between dynamic liquid level and energy consumption, the total electricity cost set under the dynamic liquid level change can be obtained;

[0069] In step A2, the total output under the dynamic liquid level change, the electricity fee set and the initial intermittent extraction system set are used to obtain the final intermittent extraction system, which is:

[0070] The initial sampling system set is a plurality of randomly generated time periods or a plurality of time periods generated by traditional means. Exemplarily, in an embodiment of the present invention, a plurality of randomly generated time periods are selected as follows:

[0071] Intermittent pumping system①: Well opening time: 0:00-7:30; 8:30-9:00; 9:30-11:30; 12:00-16:30; 17:30-18:30; 20:30-21:00; 21:30-22:30.

[0072] Intermittent pumping system②: Well opening time: 0:00-7:30; 8:00-9:30; 11:00-16:00; 21:00-21:30; 22:00-24:00;

[0073] Compare the total output and total electricity cost under each intermittent extraction system in the above initial intermittent extraction system set, and select the intermittent extraction system with high output and low electricity cost as the final intermittent extraction system;

[0074] Specifically, the examples are:

[0075] The total output and electricity charges under the dynamic liquid level change are calculated based on the time of the above two intermittent extraction systems, respectively:

[0076] Intermittent extraction system①: Total output: 1.56m 3 / d, total electricity fee: 75 yuan / d;

[0077] Intermittent extraction system ②: Total output: 1.56m 3 / d, total electricity fee: 65 yuan / d;

[0078] Among them, the electricity fee is calculated according to the time-of-use electricity price table of a certain place (see Figure 7 ) for calculation.

[0079] The output of system ② is the same as that of system ①, and the electricity cost of system ② is lower than that of system ①, so system ② is better than system ①;

[0080] The above example is only an illustrative example of the process of selecting the optimal intermittent extraction system from the initial intermittent extraction system set. In actual operation, three or more intermittent extraction systems may be compared to obtain the optimal intermittent extraction system.

[0081] Therefore, in the initial intermittent pumping system set, multiple preferred intermittent pumping systems are obtained through the above-mentioned comparison method of total production and total electricity cost. The intersection and combination of multiple preferred intermittent pumping systems form an optimal intermittent pumping system set. Then, through the above-mentioned comparison method of total production and total electricity cost, a more preferred intermittent pumping system set is further generated. The comparison method of total production and total electricity cost is recycled, that is, cyclic iterative calculation is used to obtain the set of intermittent pumping systems with the lowest total electricity cost under different total productions, and the intermittent pumping system with high total production and low total electricity cost is selected as the operating system of low-yield wells.

[0082] like Figure 8 As shown, in some embodiments of the present invention, a system for determining the inter-pumping system of low-yield oil wells based on time-of-use electricity prices is provided, and the system comprises:

[0083] The relationship determination module 1 is used to obtain the total output and electricity cost set under the dynamic liquid level change based on the relationship between the dynamic liquid level and the pump efficiency and energy consumption;

[0084] The final module 2 is used to obtain the final intermittent pumping system based on the relationship between the dynamic liquid level and the pump efficiency, energy consumption and the initial intermittent pumping system set.

[0085] In the embodiment of the present invention, the final module 2 includes a first submodule and a second submodule;

[0086] The first submodule is used to obtain the total output and electricity cost set under the dynamic liquid level change based on the relationship between the dynamic liquid level and the pump efficiency and energy consumption;

[0087] The second submodule is used to obtain the final intermittent extraction system based on the total output under the dynamic liquid level change, the electricity fee set and the initial intermittent extraction system set.

[0088] like Fig. 9 As shown, in some embodiments of the present invention, an electronic device 300 is provided, comprising: a processor 301, wherein the processor 301 is coupled to a memory 302;

[0089] The memory 302 is used to store computer programs;

[0090] The processor 301 is used to execute the computer program stored in the memory, so that the electronic device executes the determination method in the above embodiment.

[0091] In some embodiments of the present invention, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores a program or instruction. When the program or instruction is executed on a computer, the computer executes the method described in the above embodiments.

[0092] According to an embodiment of the present invention, the computer-readable storage medium may be a non-volatile computer-readable computer-readable storage medium, for example, may include but is not limited to: a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In the present invention, a computer-readable storage medium may be any tangible medium containing or storing a program, which may be used by or in combination with an instruction execution system, an electronic device or a device.

[0093] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for determining the inter-pumping system of low-yield oil wells based on time-of-use electricity prices, characterized in that: include: Based on the dynamic liquid level recovery and drop data, the relationship between dynamic liquid level and pump efficiency and energy consumption is established; Based on the initial intermittent pumping system set and the relationship between the dynamic liquid level and pump efficiency and energy consumption, the final intermittent pumping system is obtained.

2. The method for determining the inter-pumping system of low-yield oil wells based on time-of-use electricity prices according to claim 1, characterized in that: The dynamic liquid level recovery and drop data include a dynamic liquid level rise height and rise time curve, a power diagram or electrical parameters, and a dynamic liquid level drop height and drop time curve.

3. The method for determining the inter-pumping system of low-yield oil wells based on time-of-use electricity prices according to claim 2, characterized in that: The dynamic liquid level rising height and rising time curve is obtained by regularly measuring the dynamic liquid level height after production stabilizes and shutting down the well or until the dynamic liquid level does not change.

4. The method for determining the inter-pumping system of low-yield oil wells based on time-of-use electricity prices according to claim 2, characterized in that: The power diagram or electrical parameters are obtained by regularly testing the power diagram or electrical power during a fixed period; the dynamic liquid level drop height and drop time curve are obtained by regularly measuring the dynamic liquid level height during a fixed period.

5. The method for determining the inter-pumping system of low-yield oil wells based on time-of-use electricity prices according to claim 2, characterized in that: Based on the dynamic liquid level recovery and decline data, the relationship between the dynamic liquid level and the pump efficiency and energy consumption is established by using interpolation method, fitting method or continuous flow and wellbore storage effect theoretical modeling method.

6. The method for determining the inter-pumping system of low-yield oil wells based on time-of-use electricity prices according to any one of claims 1 to 5, characterized in that: The final intermittent pumping system is obtained based on the initial intermittent pumping system set and the relationship between the dynamic liquid level and the pump efficiency and energy consumption, including: Based on the relationship between dynamic liquid level, pump efficiency and energy consumption, the total output and electricity cost set under the dynamic liquid level change are obtained; Based on the total output under dynamic liquid level changes, the electricity price set and the initial intermittent withdrawal system set, the final intermittent withdrawal system is obtained.

7. A system for determining the inter-pumping system of low-yield oil wells based on time-of-use electricity prices, characterized in that: include: The relationship determination module is used to obtain the total output and electricity cost set under the dynamic liquid level change based on the relationship between the dynamic liquid level and the pump efficiency and energy consumption; The final module is used to obtain the final intermittent pumping system based on the relationship between the dynamic liquid level and the pump efficiency, energy consumption and the initial intermittent pumping system set.

8. The system for determining the inter-pumping system of low-yield oil wells based on time-of-use electricity prices according to claim 7, characterized in that: The final module includes a first submodule and a second submodule; The first submodule is used to obtain the total output and electricity cost set under the dynamic liquid level change based on the relationship between the dynamic liquid level and the pump efficiency and energy consumption; The second submodule is used to obtain the final intermittent extraction system based on the total output under the dynamic liquid level change, the electricity fee set and the initial intermittent extraction system set.

9. An electronic device, characterized in that: include: a processor coupled to the memory; The memory is used to store computer programs; The processor is configured to execute the computer program stored in the memory, so that the electronic device executes the method according to any one of claims 1 to 6.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a program or an instruction, and when the program or the instruction is executed on a computer, the computer is caused to execute the method according to any one of claims 1 to 6.

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