Real-time fault early warning method and system of oil well

Abstract

The embodiment of the invention provides a real-time fault early warning method and system for an oil well. The method comprises the following steps of: obtaining a load and a displacement of an oil pumping rod; obtaining a polish rod indicator diagram according to variation rules of the load and the displacement of the oil pumping rod and time, and transforming the polish rod indicator diagram into a pump power diagram; pre-processing data points of the pump power diagram by adopting a polygonous approximation method, and filtering the data points which have little influence on the geometrical characteristics of the pump power diagram; carrying out normalized operation on the pump power diagram after being processed by the polygonous approximation method, establishing a vector chain of the pump power diagram, and comparing the vector chain with the vector chain in a standard fault vector chain warehouse; obtaining a judgment result on a working condition of the oil well according to a comparison result; and carrying out fault early warning according to the judgment result. In the embodiment of the invention, a fault condition is determined by the steps of obtaining the load and the displacement of the oil pumping rod, accordingly obtaining the polish rod indicator diagram and the pump power diagram and comparing the vectorized pump power diagram with a standard power diagram, thereby automatic fault diagnosis and early warning can be realized. Moreover, the accuracy of a fault diagnosis result is high.

Description

technical field [0001] The invention relates to the field of oil recovery technology, in particular to a real-time early warning method and system for oil well failure. Background technique [0002] Fault diagnosis is to analyze and process the data obtained from the test of the diagnosed object, judge whether the state of the diagnosed object is in an abnormal state or a fault state, determine the type of fault, and predict the occurrence of the fault. Modern fault diagnosis technology is a new technology developed with the rapid development of electronic computer technology, modern testing technology and artificial intelligence technology in recent years. [0003] However, in my country's oilfield mining technology at present, fault diagnosis technology is not complete, and even manual inspection is required, which consumes manpower, and there are many reasons for faults. For some important faults, they need to be dealt with immediately. Important faults can be dealt with ...

AI Technical Summary

Problems solved by technology

[0003] However, in my country's oilfield mining technology at present, fault diagnosis technology is not complete, and even manual inspection is required, which consumes manpower, and there are many reasons for faults. For some important faults, they need to be dealt with immediately. Important faults can be dealt with temporarily. Therefore, an intelligent fault diagnosis and early warning system is also urgently needed in the oil field production process.

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