Oil casing double-layer tubular column deformation position detection method for high-sulfur-content gas field, and terminal

Abstract

The invention provides an oil casing double-layer tubular column deformation position detection method for a high-sulfur-content gas field, a terminal and a computer readable storage medium, and relates to the technical field of nondestructive testing. A generation sub-network and a discrimination sub-network of a GAN network are constructed, a large number of characterization image features with good features can be extracted, details of images can be better captured, a training set and a loss function are constructed, and parameters of the two sub-networks are updated by adopting a Pareto-based marine predator method, so that the convergence speed of parameter optimization is improved, the problem of gradient disappearance is solved, a test set is constructed to test the two trained sub-networks; and an anomaly evaluation function is designed to evaluate the anomaly score of each row of pixels in the extracted eddy current image, and the position of the abnormal pixel row is regarded as the position of the deformation section and correcting the detection result, so that the detection of the deformation section is achieved. According to the invention, the training speed can be improved, the detection speed and detection accuracy of the deformation position of the double-layer tubular column are improved, and the misjudgment rate and the error acceptance rate of detection are reduced.

Description

technical field [0001] The invention relates to the technical field of non-destructive testing, in particular to a method for detecting the deformation position of an oil-casing double-layer string in a high-sulfur gas field, a terminal device and a computer medium. Background technique [0002] With the increasing energy consumption of human society, natural gas has the advantages of low price, large storage capacity and clean emission. Therefore, the country has invested a lot of manpower and material resources in the development of natural gas. The Puguang Gas Field is the largest high-sulfur natural gas storage gas field in my country. Due to the harsh downhole environment of the Puguang Gas Field, once sulfur dioxide leaks, it will cause serious casualties and other safety accidents. Therefore, there is a protective casing on the outer layer of the natural gas collection tubing. However, during the mining process, the salt gypsum layer creeps, which will cause The oute...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the present invention provides a method for detecting the deformation position of the oil-casing double-layer pipe string in a high-sulfur gas field, terminal equipment and computer media, which solves the need for image anomaly detection methods proposed in the above-mentioned background technology. Artificial analysis and extraction of image features, poor adaptability and less feature extraction, insufficient ability to represent images

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