Electric pump well fault real-time diagnostic system and method based on time series data analysis

Abstract

The invention relates to an electric pump well fault real-time diagnostic system and method based on time series data analysis, and the electric pump well fault real-time diagnostic system and method are applied to oilfield downhole electric pump fault diagnosis and treatment. The system comprises a downhole submersible device, a cable, a downhole parameter measuring device, a control cabinet, a well mouth casing pressure, oil pressure and temperature measuring device, a ground data collection and analysis system, a fault analysis processor and a control cabinet current, voltage and frequency data collection system. The method comprises the steps that fault type characteristic parameters and a corresponding treatment measure database are set up; production characteristic parameters are obtained in real time; real-time flow is calculated, average values of the production characteristic parameters and the flow in four time periods are calculated correspondingly; variation amplitude is calculated (please see the formula in the specification ); an integrated assessment value is calculated (please see the formula in the specification); the electric pump well fault type is determined; and a corresponding electric pump well fault treatment measure is recommended. According to the electric pump well fault real-time diagnostic system and method based on time series data analysis, electric pump well fault real-time diagnosis is achieved, and fault misjudgement is effectively reduced.

Description

technical field [0001] The invention relates to the technical field of downhole electric pumps in oilfield production, in particular to a real-time fault diagnosis system and method for electric pump wells based on time series data analysis. Background technique [0002] With the increasing application of electric submersible pumps in oil fields, the electric submersible pump unit has many components and interrelated structural characteristics, coupled with its complex movement, harsh working environment, complex and changeable oil well and well fluid conditions And other factors make the electric submersible pump have a high comprehensive failure rate and a short service life during its use. Once the electric submersible pump unit breaks down, it not only needs to be lifted for maintenance, which will cost a lot of operating and repair costs, but most of the failures will cause the oil layer to work out of balance, bring economic and time losses to the development of the oi...

AI Technical Summary

Problems solved by technology

The traditional fault diagnosis methods of electric pump wells are based on current. Although methods such as holding pressure method, vibration signal analysis, fuzzy mathematical analysis, and artificial neural network analysis appeared later, these methods use single parameters and do not make full use of electric pump wells. Various production data, and the production history information of the electric pump well is not considered, resulting in low reliability of fault diagnosis

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