Residual life analysis method for a corroded oil and gas pipeline based on improved adaptive GEV distribution

A technology for oil and gas pipelines and life analysis, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as predicting the single distribution of oil and gas pipelines, and achieve accurate prediction results

Inactive Publication Date: 2018-09-14
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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Problems solved by technology

[0006] The purpose of the present invention is to overcome the above-mentioned shortcoming of prior art, provide a kind of method based on the remaining life analysis method of corroded oil and gas pipeline of self-adaptive GEV di

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  • Residual life analysis method for a corroded oil and gas pipeline based on improved adaptive GEV distribution
  • Residual life analysis method for a corroded oil and gas pipeline based on improved adaptive GEV distribution
  • Residual life analysis method for a corroded oil and gas pipeline based on improved adaptive GEV distribution

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[0035] The present invention will be described in further detail below in conjunction with the accompanying drawings:

[0036] The method for analyzing the remaining life of corroded oil and gas pipelines based on improved adaptive GEV distribution according to the present invention includes the following steps:

[0037] 1) Obtain the maximum corrosion depth data sequence X of corroded oil and gas pipelines (i) =(x 1 ,x 2 ,Λ,x G ), and then sort the maximum corrosion depth data sequence of the corroded oil and gas pipeline according to the size of the pit depth on the corroded oil and gas pipeline;

[0038] 2) Input the maximum corrosion depth data sequence of the corroded oil and gas pipeline into the improved GEV distribution model, and then use the MCMC method to simulate and predict the parameters of the improved GEV distribution model, and obtain the statistical parameters of the threshold parameter η, the position parameter μ and the scale parameter σ value;

[0039] 3) Determin...

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Abstract

The invention discloses a residual life analysis method for a corroded oil and gas pipeline based on improved adaptive GEV distribution. The method comprises the following steps: 1) acquiring a maximum corrosion depth data sequence X(i)=(x1,x2,lambda,xG) of the corroded oil and gas pipeline; 2) inputting a maximum corrosion depth data sequence of the corroded oil and gas pipeline into an improvedGEV distribution model, and simulating and predicting parameters of the improved GEV distribution model by an MCMC method to obtain the statistical parameter values of a threshold parameter eta, a position parameter mu and a scale parameter sigma; 3) judging an extreme value distribution type to which the maximum corrosion depth of the corroded oil and gas pipeline belongs according to the threshold parameter eta, and then analyzing the residual life of the corroded oil and gas pipeline according to the extreme value distribution type to which the maximum corrosion depth of the corroded oil and gas pipeline belongs. By adopting the method, the limitation problem of single distribution of the maximum corrosion depth of the oil and gas pipeline is solved, and high precision prediction of theresidual life of the corroded oil and gas pipeline is realized.

Description

technical field [0001] The invention belongs to the technical field of oil and gas pipeline safety, and relates to a method for analyzing the remaining life of a corroded oil and gas pipeline based on improved self-adaptive GEV distribution. Background technique [0002] Oil and natural gas play an extremely important role in my country's energy strategy and are closely related to national security, economic development and social stability. Oil and gas pipelines are the guarantee for the safe use of these resources, and their integrity and reliability are the basis for the normal operation of resource transportation. Pipeline corrosion is one of the causes of pipeline failure, costing the world economy billions of dollars every year. Therefore, it is of great significance to study the influence of corrosion on the integrity and reliability of oil and gas pipelines, and predict their remaining life to ensure safe operation. [0003] At present, scholars at home and abroad ...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20G06F2113/14G06F2119/04
Inventor 张新生西忠山吕品品迟依涵高腾张玥
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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