CN-121993123-A - Method, device and equipment for determining and dynamically adjusting intermittent pumping system

CN121993123ACN 121993123 ACN121993123 ACN 121993123ACN-121993123-A

Abstract

The invention provides a method, a device and equipment for determining and dynamically adjusting a pumping system, which belong to the technical field of oil extraction engineering, wherein the determining method comprises the steps of acquiring production acquisition data and a pumping period of a target oil well, wherein the production acquisition data is at least one of pump condition parameters and supply and discharge parameters; and determining intermittent parameters of the target oil well in one intermittent period based on the intermittent ratio and the intermittent period of the target oil well, wherein the intermittent parameters comprise intermittent time length and intermittent time length. The dynamic adjustment method comprises the steps of determining an initial intermittent ratio by adopting production acquisition data during initial intermittent extraction, further determining intermittent extraction parameters during initial intermittent extraction according to the initial intermittent ratio, and carrying out real-time adjustment on the intermittent extraction parameters during the last intermittent extraction by considering yield change during non-initial intermittent extraction. The method provided by the invention can obtain a reasonable intermittent pumping system which is reliable in theory, simple in operation and feasible in site.

Inventors

WANG CAI
ZHOU XIANG
ZHAO RUIDONG
SHI JUNFENG
ZHANG XISHUN
ZHAO HANJUN
SUN YIZHEN
DENG FENG
YU YANWEN
MA GAOQIANG

Assignees

中国石油天然气股份有限公司

Dates

Publication Date: 20260508
Application Date: 20241105

Claims (16)

1. The method for determining the thinning degree is characterized by comprising the following steps of: Acquiring production acquisition data and interval pumping period of a target oil well, wherein the production acquisition data is at least one of pump condition parameters and supply and discharge parameters; Determining the open ratio of the target oil well based on the production acquisition data of the target oil well; and determining intermittent parameters of the target oil well in one intermittent period based on the intermittent ratio and the intermittent period of the target oil well, wherein the intermittent parameters comprise intermittent time length and intermittent time length.
2. The intermittent pumping system determination method according to claim 1, wherein when the production acquisition data is a pump condition parameter, the intermittent ratio is calculated according to the following formula: wherein R is the open ratio, lambda 0 is the pump efficiency of the target oil well under the continuous pumping condition, The expected average pumping efficiency for the target well under the inter-pumping conditions.
3. The intermittent system determining method according to claim 1, wherein when the production acquisition data is a supply and discharge parameter, the open ratio is calculated according to the following formula: Where R is the on ratio, Q r is the actual daily production of the target well, and Q o is the actual maximum displacement of the pump under sufficient supply conditions.
4. A method of determining a degree of thinning according to claim 2 or 3, characterized in that the method of determining a degree of thinning further comprises: After the calculation result of the Kaschin ratio is obtained, judging whether the calculation result of the Kaschin ratio is reasonable or not; If the calculated result of the open-cell ratio is reasonable, determining the calculated result of the open-cell ratio as the open-cell ratio of the target oil well; if the calculated result of the Kaschr ratio is not reasonable, the production acquisition data are re-acquired and the Kaschr ratio is calculated again.
5. The method for determining a decimation degree according to claim 4, wherein said determining whether the result of the calculation of the open ratio is reasonable comprises: Comparing the calculated result of the Kaschr ratio with the Kaschr ratio threshold; if the calculated result of the open-close ratio is smaller than the open-close ratio threshold, judging that the calculated result of the open-close ratio is reasonable; if the calculated result of the open-cell ratio is larger than or equal to the open-cell ratio threshold, the calculated result of the open-cell ratio is judged to be unreasonable.
6. The method of claim 1, wherein the thinning degree determination is performed by calculating the thinning parameter according to the following formula: Wherein T o is the intermittent time length, T c is the intermittent time length, T is the intermittent period, and R is the intermittent ratio.
7. The dynamic adjustment method of the thinning degree is characterized by comprising the following steps of: Judging whether the current interval is the primary interval or not; if the current interval is the primary interval, determining an interval parameter of the target oil well in the current interval by adopting the interval system determining method according to any one of claims 1-6; and if the current interval is the non-primary interval, adjusting the interval parameter in the last interval based on the actual yield of the target oil well in the last interval, and determining the adjustment result of the interval parameter as the interval parameter of the target oil well in the current interval.
8. The method for dynamically adjusting a pumping system according to claim 7, wherein the adjusting the pumping parameters in the previous pumping period based on the actual production of the target oil well in the previous pumping period comprises: Obtaining the interval parameter and the actual yield of the target oil well in the previous interval period; Judging whether the actual yield in the previous interval period meets the supply and discharge requirements or not; If the actual output in the previous interval period meets the supply and discharge requirements, outputting the interval parameter in the previous interval period as an adjustment result of the interval parameter; If the actual output in the previous interval period does not meet the supply and discharge requirements, the interval parameter in the previous interval period is adjusted based on the difference value between the actual output and the initial output in the previous interval period, and the adjusted interval parameter is output as an adjustment result of the interval parameter.
9. The method for dynamically adjusting a pumping system according to claim 8, wherein the determining whether the actual output in the previous pumping cycle meets the supply and discharge requirements comprises: determining a yield reduction amplitude in the last interval period based on the actual yield and the initial yield in the last interval period; Comparing the magnitude of the yield reduction amplitude in the last interval period with the magnitude of the yield reduction amplitude threshold; If the yield reduction amplitude in the last interval period is greater than or equal to the yield reduction amplitude threshold, judging that the actual yield in the last interval period does not meet the supply and discharge requirements; If the yield reduction amplitude in the last interval period is smaller than the yield reduction amplitude threshold, judging that the actual yield in the last interval period meets the supply and discharge requirements.
10. The method of dynamic adjustment of a thinning system according to claim 9, wherein the yield reduction amplitude is calculated according to the following formula: where D is the magnitude of the yield decrease in the nth interval, Q is the initial yield of the target well, and Q n is the actual yield in the nth interval.
11. The method for dynamically adjusting a thinning degree according to claim 8, wherein adjusting the thinning parameter in the previous thinning period based on a difference between an actual yield and an initial yield in the previous thinning period comprises: determining a gap duration correction value based on a difference between an actual yield and an initial yield in a previous gap period; determining an adjusted interval time length based on the interval time length in the previous period and the interval time length correction value; and determining the adjusted intermittent time length based on the adjusted intermittent time length and the intermittent period.
12. The method for dynamically adjusting a thinning degree according to claim 11, wherein the thinning time length correction value is calculated according to the following formula: Wherein Δt o is the interval time correction value, T is the interval period, Q is the initial yield of the target oil well, Q n is the actual yield in the nth interval period, and Δq is the actual yield per minute.
13. An interval degree determining device, characterized in that the interval degree determining device comprises: the data acquisition module is used for acquiring production acquisition data and interval pumping period of the target oil well, wherein the production acquisition data is at least one of pump condition parameters and supply and discharge parameters; The open-cell ratio determining module is used for determining the open-cell ratio of the target oil well based on the production acquisition data of the target oil well; The intermittent pumping parameter determining module is used for determining intermittent pumping parameters of the target oil well in one intermittent pumping period based on the intermittent ratio and the intermittent pumping period of the target oil well, wherein the intermittent pumping parameters comprise intermittent time length and intermittent time length.
14. The device for dynamically adjusting the intermittent pumping degree is characterized by comprising the following components: the judging module is used for judging whether the current interval is the primary interval or not; the first determining module is configured to determine a pumping parameter of the target oil well in the current pumping period by adopting the pumping system determining method according to any one of claims 1 to 6 when the current pumping period is determined to be the primary pumping; And the second determining module is used for adjusting the interval parameter in the previous interval period based on the actual yield of the target oil well in the previous interval period under the condition that the current interval period is judged to be the non-primary interval, and determining the adjustment result of the interval parameter as the interval parameter of the target oil well in the current interval period.
15. An electronic device, characterized in that the electronic device comprises a processor and a memory, wherein at least one computer program is stored in the memory, and the at least one computer program is loaded and executed by one or more processors, so that the processors execute the method for determining the thinning degree according to any one of claims 1 to 6 or execute the method for dynamically adjusting the thinning degree according to any one of claims 7 to 12.
16. A computer-readable storage medium, wherein the computer-readable storage medium stores at least one program code, and the program code is loaded and executed by a processor, so that a computer performs the method for determining a thinning degree according to any one of claims 1 to 6 or performs the method for dynamically adjusting a thinning degree according to any one of claims 7 to 12.

Description

Method, device and equipment for determining and dynamically adjusting intermittent pumping system Technical Field The invention relates to the technical field of oil extraction engineering, in particular to a method for determining a pumping system, a method for dynamically adjusting the pumping system, a device for determining the pumping system, a device for dynamically adjusting the pumping system, electronic equipment and a computer readable storage medium. Background A large number of wide-range oil pumping wells are important objects for cost reduction and synergy in oilfield development. The low-yield wells are the main array sites for improving the mechanical production efficiency, and the number of the low-yield wells in China is huge and is increased year by year at present. Taking 2022 as an example, the oil well with the production fluid less than 5t/d reaches more than 9.2 ten thousand ports, and accounts for more than 50% of the total number of open wells, and the system efficiency is 12.6% and is far lower than 25.5% of the average level. Continuous oil pumping and intermittent oil pumping are effective ways for improving efficiency and reducing consumption of low-yield wells. The conventional intermittent pumping mainly depends on manual start and stop, and has the defects of (1) rough intermittent pumping system, heavy labor workload, (2) long downtime, large freezing and blocking risks of shaft flow and ground oil transportation, and (3) large liquid level change, and influence on yield. In order to avoid the problem caused by manual start-stop intermittent pumping, each large oil field is subjected to intelligent intermittent pumping modification of a low-yield well, namely, long-period intermittent pumping is changed into short-period intermittent pumping, and manual intermittent pumping is changed into intelligent intermittent pumping. However, the extensive intermittent pumping system is difficult to realize supply and discharge coordination, in one intermittent pumping period, the energy saving effect is poor due to the excessively long intermittent time, and the yield is reduced due to the excessively long intermittent time, so that the optimization and optimization of the reasonable intermittent pumping system become important requirements for intermittent pumping. At present, a common method for intermittent optimization generally uses a Wogel equation or a well test model to deduce the liquid supply capacity of a stratum fluid flow equation to calculate an oil reservoir, and the intermittent optimization method aims at complex modeling mechanism of supply and drainage coordination, more parameters are needed in the calculation process, the modeling difficulty is high, and the application degree is limited. Still other students use the working fluid level to optimize the intermittent pumping system, and the optimization process of the intermittent pumping system performs well-by-well calculation based on the change of the working fluid level, so that a calculation method and an evaluation means of the system are lacked. In summary, it is necessary to form a reasonable interval pumping system optimization method which can reveal the internal rule of interval pumping well supply and drainage coordination, is reliable in theory, simple in operation and feasible in site. Disclosure of Invention Aiming at the technical problems that modeling difficulty is high and application degree is limited in a method for optimizing an intermittent pumping system in the prior art, the invention provides a method for determining the intermittent pumping system, and the intermittent pumping parameters can be calculated based on the existing oil well production acquisition data by adopting the method, so that quantitative evaluation of the intermittent pumping system is realized. In addition, the invention also provides a dynamic adjustment method of the intermittent pumping system, by adopting the method, not only can the quantitative evaluation of the intermittent pumping system be realized, but also the intermittent pumping parameters can be dynamically adjusted according to the change of the yield, so as to realize the dynamic optimization of the intermittent pumping system. In order to achieve the aim, the first aspect of the invention provides a method for determining a pumping system, which comprises the following steps of obtaining production acquisition data and a pumping period of a target oil well, wherein the production acquisition data is at least one of a pump condition parameter and a supply and discharge parameter, determining a turn-on ratio of the target oil well based on the production acquisition data of the target oil well, and determining the pumping parameter of the target oil well in one pumping period based on the turn-on ratio and the pumping period of the target oil well, wherein the pumping parameter comprises a turn-on duration and a turn-off duration. In one exemplary emb