Experimental simulation method for hydrate production and confining pressure loading and thermal insulation integrated system

A liquid and hydraulic press technology, applied in the field of natural gas hydrate research

Inactive Publication Date: 2014-12-24
INST OF MECHANICS CHINESE ACAD OF SCI
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  • Experimental simulation method for hydrate production and confining pressure loading and thermal insulation integrated system

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[0032] Hereinafter, the embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments in the application and the features in the embodiments can be combined with each other arbitrarily if there is no conflict.

[0033] The system of the present invention has a heat insulation (temperature control) function and a confining pressure loading function.

[0034] During the hydrate decomposition process, the temperature of the hydrate deposition layer in the pressure chamber of the hydrate mining simulation experimental device changes due to the heat absorption of hydrate decomposition. In order to avoid heat exchange between the hydrate deposition layer and the outside world, a high-precision temperature sensor can be placed in the hydrate deposition layer (the accuracy of the temperature sensor is less than or equal to 0.01℃) to test the temperature of the deposition layer during the hydrate decompo...

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Abstract

The invention discloses an experimental simulation method for hydrate production and a confining pressure loading and thermal insulation integrated system. The confining pressure loading and thermal insulation integrated system comprises a refrigerating machine, a hydraulic press, a temperature sensor and a liquid cavity; the temperature sensor is connected with the refrigerating machine and is used for feeding the temperature of the surface of a sample back to the refrigerating machine; the refrigerating machine is connected with the hydraulic press and is used for adjusting the temperature of liquid of the hydraulic press into the temperature of the surface of the sample; the hydraulic press is used for inputting the liquid to the liquid cavity, wherein the temperature of the liquid is adjusted by the refrigerating machine; and the liquid cavity is connected with the hydraulic press and is used for supplying a confining pressure to the sample through the circulating liquid, enabling the sample to be isolated from the heat of environments, receiving the liquid input by the hydraulic press and outputting the circulated liquid to the refrigerating machine. The confining pressure loading and thermal insulation integrated system can provide a practical environment for the accurate testing of temperature variation caused by hydrate dissociation in the hydrate production process and is very beneficial to the scientific research and future field monitoring of hydrate production which gets more and more attention.

Description

Technical field [0001] The invention relates to the field of natural gas hydrate research, in particular to a method for hydrate mining experiment simulation and an integrated system of confining pressure loading and heat insulation. Background technique [0002] Natural gas hydrate is a kind of ice-like solid unconventional energy. The main component of natural gas hydrate is methane hydrate. The US Geological Survey's research report shows that the carbon content of methane hydrate in nature is twice the carbon content of all fossil fuels. The mining of hydrates generally requires the decomposition of hydrates into methane gas and water, and hydrate decomposition is an endothermic reaction that causes changes in the hydrate formation temperature. The temperature change of hydrate decomposition affects the stress of the sedimentary rock / rock-soil framework, the multiphase seepage in the pores of the sedimentary layer, the phase change of hydrate and water. [0003] The hydrate ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/00E21B47/07
Inventor 石要红夏真鲁晓兵张旭辉曾宁峰王淑云赵京王爱兰
Owner INST OF MECHANICS CHINESE ACAD OF SCI
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