Method for online calculation of working fluid level of oil well by using pumping unit pump indicator diagram

Abstract

The invention discloses a method for online calculation of a working fluid level of an oil well by using a pumping unit pump indicator diagram. The method for online calculation of the working fluid level of the oil well by using the pumping unit pump indicator diagram is characterized by comprising the following steps: a ground indicator diagram is obtained; a computer is used for mathematically processing to eliminate such influences as deformation of a pumping rod column, viscous resistance of the rod column, vibration and inertia to obtain an underground pump indicator diagram simple in shape and capable of truly reflecting pump working conditions; an underground pump indicator diagram model is built to calculate a fu's series solution and a viscous resistance coefficient v of the underground pump indicator diagram; and then, a curvature model is built according to the relationship between the obtained underground pump indicator diagram and a valve opening / closing point and the viscous resistance coefficient v to determine the valve opening / closing point.

Description

Technical field [0001] The invention belongs to the technical field of oilfield measurement, and specifically relates to a method for online calculation of oil well dynamic liquid level by using a pumping unit pump power diagram. Background technique [0002] In oil field exploitation, the fluid level of an oil well is an important parameter that reflects geological reserves, optimizes production planning, and ensures the safe operation of oil production equipment. The fluid level parameters of an oil well directly reflect the fluid supply situation of the formation and the downhole supply and discharge relationship, and it is one of the key data for the adaptability evaluation and optimization of the oil production process. [0003] Under the traditional management mode, the measurement of the dynamic liquid level is mainly based on the acoustic wave method, and workers need to go to the wellhead for measurement regularly. In addition to the labor intensity, the measurement error ...

AI Technical Summary

Problems solved by technology

[0003] Under the traditional management mode, the measurement of the dynamic liquid level is mainly based on the acoustic wave method, and workers need to go to the wellhead for measurement on a regular basis. In addition to the high labor intensity, the measurement error is relatively large, and real-time monitoring cannot be realized.

Images