Natural gas hydrate development environment effect monitoring system in frozen soil region and method

Abstract

The invention relates to a natural gas hydrate development environment effect monitoring system in a frozen soil region and a method. Monitoring units are arranged in a mining underground frozen soil layer, a natural gas hydrate enrichment layer and a well bottom respectively, one monitoring unit is arranged on a drilling platform, and atmosphere data, surface soil data and output gas data are monitored. Three-dimensional monitoring of atmosphere, the frozen soil layer, the hydrate enrichment layer and well bottom data can be achieved at the same time, a plurality of measuring instruments capable of measuring physical parameters and chemical parameters are integrated together through the monitoring units, and therefore the problem that long-period in-situ monitoring of the underground environment of the frozen soil area is difficult is solved, monitoring parameters are expanded, measurement errors are effectively avoided, the safety and precision of the equipment are improved, a three-dimensional type comprehensive environment monitoring system is formed, and the system has remarkable significance in research of a hydrate reservoir forming mechanism and safe development.

Description

technical field [0001] The invention belongs to the research field of environmental effects caused by methane discharge and development in permafrost regions, and in particular relates to a monitoring system and method for environmental effects of methane release caused by natural gas hydrate development in permafrost regions. Background technique [0002] Gas hydrates are composed of water and gas molecules (mainly CH 4 ) is an ice-like solid substance formed under low temperature, high pressure and other conditions, widely distributed in seabed sediments, deep lake sediments and land permafrost. Natural gas hydrate has a high energy density. Under ideal conditions, 1 m3 Natural gas hydrate can be decomposed into 164 m3 of methane gas and 0.8 m3 of water, which is a new type of clean energy with great potential in the 21st century. [0003] At the same time, natural gas hydrate is also the most important carbon pool in the shallow part of the earth's crust. The release of ...

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Problems solved by technology

[0005] The purpose of the present invention can solve the problems of simple environmental monitoring methods, single parameters, and insufficient timeliness at present, realize methane concentration gradient in-situ dynamic monitoring, and truly reflect methane concentration, carbon dioxide concentration, stratum inclination, soil temperature and pressure, and soil salinity. Dynamic linkage changes, providing basic parameters for studying the environmental effects caused by hydrate development in permafrost regions

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