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Rod-pumped well working condition diagnosis method and device

A technology of a pumping unit well and a diagnosis method, which is applied in the field of mechanical oil production, can solve problems such as low accuracy of working condition diagnosis, achieve high-efficiency digital management of oil wells, reduce energy consumption, and achieve the effects of low cost

Pending Publication Date: 2021-11-02
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] This article is used to solve the defect of low precision of working condition diagnosis in the method of directly determining the working condition of the pumping well according to the electric parameter curve of the pumping well in the prior art

Method used

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  • Rod-pumped well working condition diagnosis method and device
  • Rod-pumped well working condition diagnosis method and device
  • Rod-pumped well working condition diagnosis method and device

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other Embodiment approach

[0057] In other implementations, the characteristic database X also stores the difference characteristic curve corresponding to the working condition, and step 150 can also be implemented in the following manner: querying in the characteristic database X is consistent with the slope change of the difference curve to be analyzed (that is, the slope The difference curves that are the same or the error is within a certain range); the working conditions corresponding to the inquired difference curves are used as the working conditions of the difference curves to be analyzed.

[0058] In this embodiment, the working condition of the pumping well is determined by the difference curve, which can eliminate the influence of balance, different types of pumping models, and motor models, and can accurately analyze the working condition of the pumping well without using load sensors. Realize low-cost, high-efficiency oil well digital management. The difference curve feature is more obvious...

no. 1 Embodiment

[0122] Such as Figure 19A ( Figure 19A The middle abscissa is the crank angle, and the ordinate is the power of the pumping well, the dotted line is the electric power curve under normal working conditions, and the solid line is the electric power curve to be analyzed. pass Figure 5 The method shown can confirm that this working condition does not have the characteristics of a sudden change working condition, it is a gradual changing working condition, and the difference curve constructed is as follows Figure 19B ( Figure 19B The abscissa is the crank angle, and the ordinate is the power), analysis of the difference curve shows that there is a depression at the position of point A, and it can be known by querying the characteristic database X' that it is in line with the characteristics of insufficient liquid supply or gas influence. Therefore, it is determined that the The working condition of the pumping well is insufficient fluid supply or the influence of gas. The ...

no. 2 Embodiment

[0124] Such as Figure 20 ( Figure 20 The middle abscissa is the crank angle, and the ordinate is the power of the pumping well, the dotted line is the electric power curve under normal working conditions, and the solid line is the electric power curve to be analyzed. pass Figure 5 The method shown can confirm that the working condition has the characteristics of abrupt change—similar to a sinusoidal curve. By querying the characteristic database Y, it can be known that it is in line with the characteristics of rod breakage. Therefore, the pumping well working condition is determined to be rod breakage.

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Abstract

The invention relates to the technical field of mechanical oil extraction, and provides a rod-pumped well working condition diagnosis method and device. The method comprises the steps that a to-be-analyzed electrical parameter curve in a rod-pumped well stroke period is acquired; a to-be-analyzed difference curve is calculated according to the to-be-analyzed electrical parameter curve and a normal working condition electrical parameter curve in the rod-pumped well stroke period; and the rod-pumped well working condition is diagnosed according to the to-be-analyzed difference curve. According to the rod-pumped well working condition diagnosis method and device, the rod-pumped well working condition can be accurately analyzed under the condition that a load sensor is not used, a guarantee is provided for real-time intelligent adjustment of operating parameters and reduction of rod-pumped well energy consumption, and low-cost and high-efficiency oil well digital management is further achieved.

Description

technical field [0001] This article relates to the technical field of mechanical oil recovery, in particular to a method and device for diagnosing working conditions of pumping wells. Background technique [0002] At present, the dynamometer map of the pumping well is obtained by the load sensor, which has problems such as high cost, low penetration rate, and easy drift and distortion of data, which restricts the development of oilfield Internet of Things construction and digital management. [0003] Electrical parameters are the most basic operating parameters of pumping wells, which have the advantages of high penetration rate, low acquisition cost, and stable data. Using electrical parameters to diagnose the working conditions of pumping wells can avoid the use of load sensors and realize low-cost and high-efficiency oil wells digital management. However, there are several problems in using electrical parameters instead of dynamometer diagrams to directly diagnose workin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/009E21B43/00
CPCE21B43/00
Inventor 赵瑞东孙艺真熊春明师俊峰张喜顺张建军雷群王才彭翼陈诗雯邓峰刘猛李淇铭陈冠宏
Owner PETROCHINA CO LTD