Automatic identification method of well breakpoint

Abstract

A well breakpoint automatic identification method. The main purpose is to solve the problems of low efficiency, low precision and great difficulty in identifying well breakpoints through manual stratigraphic correlation. The steps of the method are as follows: recognize the characteristics of faults, establish the lithoelectric relationship between faults and well logging curves, use curve shape recognition technology to improve interpretation accuracy, and form a set of methods for automatically identifying well breakpoints using well logging curves. This method makes the one-time judgment rate of the breakpoint position reach 80%, and the non-breakpoint judgment rate reaches more than 95%, breaking through the technical limit of the original method that the breakpoint within 2m cannot be effectively identified, and improving the work efficiency by more than 40 times.

Description

Technical field: [0001] The invention relates to a method for automatic identification of breakpoints of a large number of infill adjustment wells applied in oil field development. Background technique: [0002] Every year, newly drilled development and adjustment wells need to carry out manual comparison and determination of oil layers. This method requires a lot of experience, takes a long time to operate, and is difficult for young employees to master. If the adjustment well is drilled into an underground fault, the formation will be missing, and the comparison will be more difficult, which is a recognized technical difficulty in the oilfield. In recent years, with the successful deployment of high-efficiency wells at the edge of the fault, the edge of the fault has become the main target area for the development of adjustment wells. How to effectively improve the ability of fault interpretation and speed up the interpretation speed has become an inevitable demand for tap...

AI Technical Summary

Problems solved by technology

[0003] By searching patent websites and relevant technical documents, in oilfield production, there is only one invention of the same kind, which is "A Logging Identification Method for Fault Structure" invented by Jiang Youlu of China University of Petroleum (East China) in 2016. It involves a variety of The data identify the internal structure of the fault. The first condition of this method is to determine the position of the well breakpoint before the later operation can be performed. It does not involve how to determine the key link of the well breakpoint.

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