Method and system for monitoring oil and gas pipelines in permafrost regions

Abstract

The invention relates to a monitoring method and system for oil and gas pipelines in permafrost regions. The process is as follows: the temperature sensor group, the water content sensor group and the optical fiber grating displacement sensor group formed respectively monitor the temperature, moisture and pipe body displacement around the pipeline; the monitored signal is transmitted to the optical switch (13) through the optical cable (12) ), the demodulation of the demodulator (14) is passed to the lower computer (15), and the lower computer (15) calls the self-edited program, controls the optical switch (13) and the demodulator (14), collects data and performs data processing Preprocessing; the preprocessed data is transmitted to the low-orbit satellite (17) by the satellite communication module (16), and the low-orbit satellite (17) receives the data and forwards it to the satellite communication module (18), and the satellite communication module (18) will The received data is transmitted to the host computer (19) for analysis and processing, to judge the safety status of the pipeline, and to perform disaster prediction. The invention has high precision, high stability and low cost.

Description

technical field [0001] The invention is a method and system for monitoring 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 5.14 million square kil...

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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