In-situ pressure-retaining CT reaction kettle device for submarine natural gas hydrate rock core

Abstract

The invention discloses an in-situ pressure-retaining CT reaction kettle device for a submarine natural gas hydrate rock core, and belongs to the technical field of non-destructive detection of natural gas hydrate and the technical field of reaction instruments. The reaction kettle device comprises a reaction device and a stabilizing device, wherein the reaction device comprises a feeding end ballvalve, a reaction kettle end ball valve and a feeding reaction kettle; a step motor guide rail bushing, a pressure resistant reaction kettle and a semiconductor refrigeration base, the stabilizing device comprises a nitrogen gas cylinder, a gas ISCO pump, an intermediate container, a water bath box, a water tank and a liquid ISCO pump; according to the invention, the decomposition of the hydraterock core can be reduced, the imaging quality can be ensured, the device is high pressure resistant, and the defect of an old scanning mode can be effectively solved.

Description

technical field [0001] The invention relates to the technical field of natural gas hydrate non-destructive detection and reaction instruments, in particular to a CT reactor device for in-situ pressure-holding of a seabed natural gas hydrate core. Background technique [0002] At present, there are many problems in simulating the temperature and pressure characteristics of subsea natural gas hydrate reservoirs in the research equipment for studying hydrate sediment hydrate distribution. For example, the old CT core detection system is affected by the metal sleeve, and the imaging quality is reduced. The transmission is not clear and has double images; the old core CT scanning system uses a rotating core sleeve and a fixed radioactive source scanning method, and when the surface of the core sleeve cylinder is uneven, it will cause ghost images in the CT scan results, which cannot Accurate scanning images are obtained; most of the existing core detection equipment has the defec...

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Problems solved by technology

[0002] At present, there are many problems in simulating the temperature and pressure characteristics of subsea natural gas hydrate reservoirs in the research equipment for studying hydrate sediment hydrate distribution. For example, the old CT core detection system is affected by the metal sleeve, and the imaging quality is reduced. The transmission is not clear and has double images; the old core CT scanning system uses a rotating core sleeve and a fixed radioactive source scanning method, and when the surface of the core sleeve cylinder is uneven, it will cause ghost images in the CT scan results, which cannot Accurate scanning images are obtained; most of the existing core detection equipment has the defect of hydrate core decompression and decomposition during the sample transfer process

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