Rod pumped well working condition diagnosis method integrated with electrical work diagram and indicator diagram

Abstract

The invention relates to a rod pumped well working condition diagnosis method integrated with an electrical work diagram and an indicator diagram. The technical scheme includes steps of automatically collecting data of the electrical work diagram and the indicator diagram in real time and storing the data; for diagnosis of the working condition of the indicator diagram, directly diagnosing the indicator diagram of a polish rod; if the fluctuation of the indicator diagram of the polish rod is big, solving an underground pump work diagram by one-dimensional band damp fluctuation equation, and diagnosing the underground pump work diagram; for the diagnosis of the working condition of the electrical work diagram, using a mutual conversion model of the electrical work diagram and the indicator diagram, converting the electrical work diagram to the indicator diagram of the polish rod so as to perform the diagnosis of the indicator diagram, and realizing the indirect diagnosis of the electrical work diagram; setting up a diagnosis model of the electrical work diagram working condition, and realizing the direct working condition diagnosis of the electrical work diagram, wherein the working condition diagnosis result takes the diagnosis of the indicator diagram mainly and the diagnosis of the electrical work diagram secondarily. The invention has the beneficial effects of improving the working condition diagnosis precision, enlarging the diagnosis scale of the working condition, improving the real-time monitoring force of the oil well working condition, and enhancing the real-time and intelligent management of the oilfield.

Description

technical field [0001] The invention relates to a method for diagnosing the working condition of a pumping well, in particular to a method for diagnosing the working condition of a pumping well integrated with an electric power diagram and an indicator diagram. Background technique [0002] In the production of pumping units in oilfields, although the dynamometer diagram diagnosis method is simple, reliable, intuitive, and rapid, it still has certain limitations: (1) According to the dynamometer diagram, only the downhole working conditions can be analyzed, and the ground pumping cannot be judged. The working conditions of the pumping unit, such as: the balance of the pumping unit, the failure of the gearbox, etc.; (2) For a small number of special oil wells, the indicator map cannot be measured, and other more convenient working condition diagnosis methods are needed; (3) The purchase and maintenance costs of the dynamometer measuring equipment are relatively high, which af...

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Problems solved by technology

[0002] In the production of pumping units in oilfields, although the dynamometer diagram diagnosis method is simple, reliable, intuitive, and rapid, it still has certain limitations: (1) According to the dynamometer diagram, only the downhole working conditions can be analyzed, and the ground pumping cannot be judged. The working conditions of the pumping unit, such as: the balance of the pumping unit, the failure of the gearbox, etc.; (2) For a small number of special oil wells, the indicator map cannot be measured, and other more convenient working condition diagnosis methods are needed; (3) The purchase and maintenance costs of the dynamometer measurement equipment are relatively high, which affects the efficiency

[0005] At present, in terms of working condition diagnosis of pumping wells, the dynamometer diagram and electric power diagram have initially realized the collection, monitoring and remote transmission of graphics. Providing continuous and accurate data sources and related calculation and diagnosis models cannot replace manual testing and diagnosis of oil well conditions, and realize real-time and intelligent analysis of oil well production conditions, and the diagnostic method is single, and its application has certain limitations

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