Natural gas hydrate rock core sample dwell transfer-type triaxial apparatus and method thereof

A technology of transfer device and shaft device, which is applied in the direction of measuring device, using a stable shear force to test the strength of materials, instruments, etc., can solve the requirements of experimental conditions, and cannot obtain the core shear strength of marine natural gas hydrate in situ state, etc. problems, to achieve the effect of reducing the overall mass, facilitating movement and ship loading, and reducing transportation costs

Active Publication Date: 2016-11-09
DALIAN UNIV OF TECH
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Problems solved by technology

However, at present, the existing domestic triaxial instrument can only perform mechanical tests on natural gas hydrate artificial cores in the laboratory, and the requirements for experimental conditions are relatively high; there is no domestic method that can dir

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  • Natural gas hydrate rock core sample dwell transfer-type triaxial apparatus and method thereof
  • Natural gas hydrate rock core sample dwell transfer-type triaxial apparatus and method thereof
  • Natural gas hydrate rock core sample dwell transfer-type triaxial apparatus and method thereof

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Embodiment Construction

[0033] A test device system for the mechanical properties of seabed natural gas hydrate cores on the mining site, such as figure 1 , 2As shown in , 3, its working process is: in the state of ensuring that the core maintains pore pressure, the core transfer device transfers from the sample holder to the pressure chamber of the triaxial instrument through the opening and closing of the ball valve and the up and down movement of the lead screw; The host of the shaft device provides the overall triaxial instrument structure and realizes the shearing of the core in the pressure chamber; the confining pressure and pore pressure control system is mainly used for the control of the confining pressure and pore pressure in the process of core transfer and triaxial compression; computer data acquisition and control The system is used to collect detection data such as temperature, pressure and displacement.

[0034] The following is a detailed description of the operation process of the ...

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Abstract

The invention relates to a natural gas hydrate rock core sample dwell transfer-type triaxial apparatus and a method thereof, which belongs to the technical field of natural gas hydrate base physical property measurement. The apparatus comprises a rock core transfer apparatus, a triaxial apparatus host, a confining pressure and aperture pressure control system, a computer data acquisition and a control system. By using the triaxial apparatus, a rock core is transferred from a sample storage device to the rock core transfer apparatus; the rock core transfer apparatus and the triaxial apparatus host are subjected to abutting joint and locked; a dwell rock core is transferred to a triaxial pressure chamber by the dwell rock core, an original plastic sleeve of the rock core is removed, and the rock core is sleeved by a rubber membrane, and pressure control and motion control are required during whole course of a hydrate dwell rock core transfer process. The apparatus realizes transfer of the hydrate dwell rock core, and realizes deposit intensity measurement under original cementation structure condition and consolidating condition of the hydrate, mechanical property of a practical storage layer is obtained, and the method has important meaning for revealing the destroy mechanism of the practical storage layer and evaluating the risk of exploitation geology of the natural gas hydrate.

Description

technical field [0001] The invention belongs to the technical field of natural gas hydrate basic physical property measurement, and relates to a pressure-holding and transfer-type triaxial device and method for a natural gas hydrate core sample. Background technique [0002] Many researchers believe that natural gas hydrate can replace traditional fossil fuels such as coal and oil to become a new generation of energy because of its huge reserves and clean and pollution-free combustion. It is widely distributed in the outer margins of the continent and permafrost. % of land and 90% of ocean waters are potential areas for gas hydrates, and it is estimated that the methane content in global gas hydrates is about 1.8×10 16 m 3 , which is equivalent to twice the total carbon content of currently proven fossil fuels (coal, oil and natural gas); in addition, natural gas is a clean energy source, which produces less carbon dioxide than coal and oil, and does not Harmful gases such...

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Application Information

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IPC IPC(8): G01N3/24
CPCG01N3/24G01N2203/0025G01N2203/0048
Inventor 宋永臣骆汀汀李洋辉赵佳飞刘瑜凌铮杨明军刘卫国
Owner DALIAN UNIV OF TECH
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