Experimental system and method for simulating geological deformation caused by hydrate thermal exploitation

Abstract

The invention belongs to the technical field of hydrate mining test simulation, and specifically relates to a test system and method for simulating geological deformation caused by hydrate thermal mining, in order to study the occurrence process of geological disasters in the thermal mining process; the system includes a test cabin and a stress control device , temperature control system, geological deformation monitoring system and hydrate mining system, the test cabin is equipped with a hydrate layer and an upper covering layer, the upper covering layer is used to simulate the soil cover above the hydrate; the stress control device is used to apply Stress; the temperature control system is used to simulate the temperature of the deep seabed; the geological deformation monitoring system is used to collect the deformation information of optical fiber components in real time; the hydrate mining system package is used to heat the hydrate layer and collect the decomposed gas hydrate; The invention can obtain mapping data of geological deformation caused by ground stress, temperature during mining, and mining efficiency, and provide reliable parameter guidance for hydrate mining.

Description

technical field [0001] The invention belongs to the technical field of hydrate mining test simulation, and in particular relates to a test system and method for simulating geological deformation caused by hydrate thermal mining. Background technique [0002] The thermal extraction method, also known as the thermal shock method, is the most studied and in-depth natural gas hydrate extraction technology; the drilling technology is used to install pipelines in the natural gas hydrate stable layer to heat the formation containing gas hydrate to increase the temperature of the reservoir. Destroy the hydrate hydrogen chain, thereby promoting the decomposition of natural gas hydrate; however, after the hydrate is decomposed, a cavity will be formed in the area, and the hydrate reservoir and cap rock on the upper layer of the cavity are at risk of collapse, which will lead to the occurrence of submarine geological disasters. significant impact on the process and even lead to product...

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Problems solved by technology

[0002] The thermal extraction method, also known as the thermal shock method, is the most studied and in-depth natural gas hydrate extraction technology; the drilling technology is used to install pipelines in the natural gas hydrate stable layer to heat the formation containing gas hydrate to increase the temperature of the reservoir. Destroy the hydrate hydrogen chain, thereby promoting the decomposition of natural gas hydrate; however, after the hydrate is decomposed, a cavity will be formed in the area, and the hydrate reservoir and cap rock on the upper layer of the cavity are at risk of collapse, which will lead to the occurrence of submarine geological disasters. significant impact on the process and even lead to production stoppage

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