Method and device for comprehensive diagnosis and analysis of working conditions of mechanical oil production wells

Abstract

The invention discloses a mechanical producing well working condition comprehensive diagnostic analysis method and device. The method includes the steps that an oil well inflow dynamic curve and a lifting pump characteristic curve are utilized to draw a mechanical producing well working condition comprehensive diagnostic diagram; the positions of single wells are determined in the mechanical producing well working condition comprehensive diagnostic diagram; if the single wells in the mechanical producing well working condition comprehensive diagnostic diagram are located at one of the following zones of a parameter too large or pump lowering too shallow zone, a breakage leakage oil pressure too large wax blocking zone and a casing pressure too large or data verification zone, corresponding identification is set for the single wells in the mechanical producing well working condition comprehensive diagnostic diagram according to the working conditions of the single wells, and the mechanical producing well working condition comprehensive diagnostic diagram comprises the following five zones of a working reasonable zone, the parameter too large or pump lowering too shallow zone, a parameter too small zone, the breakage leakage oil pressure too large wax blocking zone and the casing pressure too large or data verification zone. By the adoption of the method, the system working conditions of mechanical producing wells can be comprehensively, rapidly, accurately and visually evaluated.

Description

technical field [0001] The invention relates to the technical field of oilfield mechanical oil recovery, in particular to a method and device for comprehensive diagnosis and analysis of working conditions of mechanical oil recovery wells. Background technique [0002] According to the needs of oil well production and management, it is necessary to make a chart to analyze the working conditions of the oil wells in the entire block. It can macroscopically reflect the matching of the oil well’s liquid supply capacity and the equipment’s liquid discharge capacity, and can also diagnose the condition of each well. Actual working conditions, to achieve the purpose of saving energy and reducing consumption, and improving the management level of oil wells. [0003] In 1987, Han Xiuting of Daqing Oilfield proposed a macroscopic control chart for the management level of mechanical oil production wells, which determined the dividing line in the chart based on the functional relationshi...

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Problems solved by technology

[0004] The above models have achieved some economic benefits in their respective applications, but have certain limitations. They all mainly emphasize the characteristics of the lifting equipment, while the characteristics of the oil well itself are less considered, and some dividing lines use empirical straight line segments, lacking theory. In addition, the analysis of the reasons for some blocks is not comprehensive enough. For example, the oil wells in the large parameter area may also be due to the shallow pump depth; the oil wells in the leakage area may also be due to wax plugging or Caused by the wellhead tubing holding pressure

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