A triaxial test device for natural gas hydrate deposits

A hydrate sediment, triaxial test technology, which is applied in the direction of applying stable tension/pressure to test the strength of materials, to avoid cavity deformation and hydraulic water leakage, improve volumetric measurement accuracy, and reduce volume.
CN104833582BActive Publication Date: 2017-06-13DALIAN UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
DALIAN UNIV OF TECH
Publication Date
2017-06-13

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Abstract

The invention discloses a triaxial test device for natural gas hydrate deposits, which belongs to the field of testing the mechanical properties of natural gas hydrate deposits. The device includes a triaxial test device host, a temperature control system, a pore pressure control system, a confining pressure control system and a computer data acquisition and control system. The host of the triaxial test device adopts a double pressure chamber structure, which can accurately measure the change of sediments during the decomposition of natural gas hydrate; the load sensor is installed inside the pressure chamber to improve the accuracy of the strength data; The pore gas and pore water of the sample are pre-cooled to reduce the decomposition of natural gas hydrate in the saturated water process, and also improve the accuracy of temperature control; the sample installation process is connected by quick joints, which is convenient and fast. The device can simulate the decomposition process of natural gas hydrate under production conditions, realize high-precision temperature control, and accurately measure strength and volume change. It is of great significance to understand the mechanical properties of natural gas hydrate deposits and evaluate the stability of reservoirs.
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Description

technical field

[0001] The invention relates to a natural gas hydrate deposit testing technology, in particular to a triaxial test device capable of simulating the decomposition process of natural gas hydrate under mining conditions, realizing high-precision temperature control, and precise measurement of strength and volume change. Background technique

[0002] With the huge consumption of oil and gas resources, mankind will face the depletion of oil and gas resources in the late 21st century, and the global economic development will face severe challenges. As a potential clean energy, natural gas hydrate has attracted great attention from all countries in the world, including our government, because of its wide distribution and large reserves in the world.

[0003] Natural gas hydrate is different from conventional oil, natural gas and other resources. It exists in the sedimentary layer in the form of cement or framework support, and the temperature rise or pressure drop m...

Claims

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