Design method of pipeline crossing strike-slip fault

Abstract

The invention discloses a design method of a pipeline crossing strike-slip fault, and belongs to the field of the oil and gas pipeline crossing technology. The method comprises the steps that the maximum dislocation on the surface of the strike-slip fault is calculated, and the soil type of backfill, the buried depth of a pipeline, the type of a contact surface of the pipeline and soil and the included angle between the strike-slip fault and the pipeline are determined; parameters of the pipeline passing through the strike-slip fault are obtained, and the displacement of faults parallel to the axial direction of the pipeline and the fault displacement in the normal line direction of the pipeline are calculated; a finite element model is established, and the maximum strain of the pipeline during sliding of the strike-slip fault is simulated by means of the finite element model, a maximum strain empirical formula for the pipeline to cross the strike-slip fault is established, the undetermined parameters are fitted, and the numerical relationship between the maximum strain and the parameters is obtained. The design method of the pipeline crossing strike-slip fault fits out the formula suitable for designing the pipeline in the strike-slip fault because the actual change of the pipeline after the strike-slip fault slides is simulated by the finite element model, and therefore the pipeline corresponding to the fault with specific conditions can be accurately designed.

Description

technical field [0001] The invention relates to the technical field of crossing and crossing of oil and gas pipelines, in particular to a design method for pipelines crossing strike-slip faults. Background technique [0002] As a national strategic energy source, oil and natural gas have been in increasing demand in the past few decades. As one of the lifeline projects, buried pipelines are responsible for the main transportation task of oil and gas resources, and provide important energy guarantee for my country's production and construction, economic development and social stability. During the construction and operation of long-distance oil and gas pipelines, they may suffer from various adverse geological conditions due to changes in the natural environment, which poses a serious threat to the safe operation of the pipeline. Earthquake is the most harmful sudden natural disaster to society and human beings. As a country with strong seismic activity in the world, earthqu...

AI Technical Summary

Problems solved by technology

[0011] In order to solve the problems of the existing long-distance pipeline crossing the strike-slip fault, the seismic design error is large, and the cost is easily wasted. The present invention provides a design method for the pipeline crossing the strike-slip fault, including:

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