A method and system for monitoring displacement of oil and gas pipelines in permafrost regions

Abstract

The invention discloses a freeze soil area oil and gas pipeline displacement monitoring method and system. A plurality of fiber bragg grating displacement sensors a (10) and a plurality of fiber bragg grating displacement sensors b (11) are arranged on one sides of oil and gas pipelines (2) in a freeze soil area, all the sensors are connected in series in a welding mode and then introduced into a monitoring station through optical cables (12), the optical cables (12) are connected with a photoswitch (13), the photoswitch (13) is connected with a fiber bragg grating interrogator (14), the fiber bragg grating interrogator (14) is connected with a lower computer (15), data preprocessed by the lower computer (15) are transmitted to a low-orbit satellite (17) through a satellite communication module (16), data are forwarded by the low-orbit satellite (17) to a satellite communication module (18), and received data are transmitted by the satellite communication module (18) to an upper computer (19) and analyzed and processed by the upper computer (19). The freeze soil area oil and gas pipeline displacement monitoring method and system are high in precision, high in stability and low in cost.

Description

technical field [0001] The invention is a method and system for monitoring the displacement of oil and gas pipelines in permafrost regions based on fiber grating sensing technology, and relates to the technical fields of length measurement, temperature measurement, other types of measurement, general control systems and pipeline systems. Background technique [0002] Frozen soil is a special kind of soil, the temperature is negative temperature or zero temperature, and the soil containing ice is called permafrost. According to the length of the frozen state of the soil, frozen soil can generally be divided into short-term frozen soil (a few hours to half a month), seasonal frozen soil (half a month to several months) and permafrost (more than two years). my country's permafrost is very developed. The permafrost area is about 2.11 million square kilometers, accounting for 23% of my country's total land area and ranking third in the world. The area of ​​permafrost is about 5.1...

AI Technical Summary

Problems solved by technology

[0007] Although domestic and foreign pipeline operators have taken active measures to deal with frost heaving and thawing disasters in permafrost regions, the formation mechanism of frost heaving and thawing disasters is very complicated, and the characteristics of permafrost in different regions are different. There is no mature monitoring technology that can monitor the impact of frost heaving and thawing disasters on pipelines

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