Remodeling device and method for marine natural gas hydrate rock core

Abstract

The invention discloses a remodeling device and method for a marine natural gas hydrate rock core. The device comprises a thermal shrinkage jacket, a sound wave data acquisition system, an X-ray CT imaging system, a main body reaction kettle, a gas injecting system and a confining-pressure oil-bath circulating system, realizes a hydrate P-wave speed data acquisition function of the rock core, andcompares the P-wave speed with log data to judge whether hydrate remodeling is completed or not. The main body reaction kettle, the thermal shrinkage jacket, the natural rock core and end caps at thetwo ends define a main body system, so that hydrate in the rock core is remodeled and generated. The confining-pressure system realizes control on peripheral sea bottom in-situ pressure and temperature of the rock core. Under action of the rock core confining, the gas injecting system realizes control on pore pressure inside the rock core. The hydrate rock core remodeling device is applied to hydrate submarine in-situ condition remodeling of a drilling and sampling non-fidelity rock core or a decompressed natural rock core, can observe inner space distribution of the hydrate rock core in realtime through X-ray CT scanning, is simple in structure, is convenient to operate, and can repeatedly used on multiple rock cores.

Description

technical field [0001] The invention belongs to the research field of marine oil and gas reservoir resource exploration technology, and relates to a marine natural gas hydrate core remodeling device and method, in particular to a device and method capable of restoring pressure-releasing and non-fidelity seabed natural cores to water-containing seabed conditions Apparatus and method for compound storage state. Background technique [0002] Marine gas hydrate is rich in reserves and is a potential energy after oil and natural gas. Due to the lack of safe and efficient exploitation of marine gas hydrates and the possible marine geological risks and environmental impacts, commercial exploitation of marine gas hydrates has not yet been carried out worldwide. [0003] With the continuous deepening and progress of marine gas hydrate exploration, in order to further evaluate the reserves of gas hydrate resources, accurately grasp the characteristics of gas hydrate reservoirs, defin...

AI Technical Summary

Problems solved by technology

Although the related research work on the test and analysis of natural gas hydrate non-fidelity natural cores is being carried out gradually in the world, the in-depth and comprehensive test and analysis technology of natural gas hydrate natural cores is still not perfect.

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