Device and method for analyzing mechanical properties of hydrate sediments based on low-field nuclear magnetism

A technology for hydrate sediments and mechanical properties, which is used in the fields of analysis, material analysis, measurement devices, etc. using nuclear magnetic resonance
CN111289553AActive Publication Date: 2020-06-16QINGDAO INST OF MARINE GEOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
QINGDAO INST OF MARINE GEOLOGY
Publication Date
2020-06-16

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Abstract

The invention provides a device for analyzing mechanical properties of hydrate sediments based on low-field nuclear magnetism. The device comprises a miniature reaction kettle body mounted on a low-field nuclear magnetic resonance analyzer, a confining pressure cavity positioned in the reaction kettle body, a radio frequency coil arranged on the outer side of the reaction kettle body, a reaction kettle upper end cover, a reaction kettle lower end cover, a hole pressure control module, a confining pressure control module, an axial pressure loading plunger, an axial pressure loading reaction frame and an axial loading control module. The invention discloses an experimental device based on combination of low-field nuclear magnetic resonance detection and three-axis shearing and a corresponding testing method. According to the method and the device, macro-mechanical data of a hydrate reservoir are obtained on a low-field nuclear magnetic resonance platform, meanwhile, micro-pore structureevolution characteristics of the hydrate reservoir in the loading process are obtained, and technical support is provided for cross-scale research of the mechanical property and the deformation mechanism of the natural gas hydrate reservoir.
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Description

technical field

[0001] The invention relates to the field of basic physical property evaluation of natural gas hydrate reservoirs, in particular to a device and method for analyzing the mechanical properties of hydrate-containing sediments based on the combination of low-field nuclear magnetic resonance (LF-NMR) and triaxial experiments. Background technique

[0002] The dynamic response characteristics of reservoir mechanical parameters during hydrate production are crucial to the safety evaluation of hydrate test production. Artificially synthesizing hydrate-containing samples in the laboratory and performing core-scale mechanical test analysis are the main means to obtain the mechanical properties of hydrate-bearing reservoirs. However, large-scale tests can only obtain macroscopic mechanical parameters, and cannot describe the mesoscopic failure process of hydrate-containing sediments. Therefore, it is an important trend of current development to combine macroscopic mec...

Claims

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