Laboratory experiment device and method for solid fluidization exploitation of gas hydrate

A technology for solid-state fluidized mining and gas hydrate, which is used in material inspection products, fuel oil testing, etc.

Active Publication Date: 2015-10-28
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are still some key technical problems in the process of solid fluidization mining, especially in the mining process, such as the change of temperature and pressure around natural gas hydrates during the crushing process and the res...

Method used

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  • Laboratory experiment device and method for solid fluidization exploitation of gas hydrate
  • Laboratory experiment device and method for solid fluidization exploitation of gas hydrate
  • Laboratory experiment device and method for solid fluidization exploitation of gas hydrate

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Experimental program
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specific Embodiment 1

[0039] In this specific embodiment, the natural gas hydrate mining, excavation and fluidized collection are simulated in the case of a water depth of 1500m with a seawater pressure of 15MPa and a maximum fluidized seawater flow of 8L / s. The seawater injection device adopts a pump that can provide seawater flow of 0 to 8L / s smoothly under various pressures of 0 to 15MPa as the main component. The pressure gauge, thermometer and flowmeter involved in the seawater injection device are used as auxiliary control components for flow, temperature and pressure monitoring.

[0040] First, the natural gas hydrate sediment samples prepared in the large sample preparation kettle were transferred to the mining kettle, and the upper end cap matched with the lower kettle body was covered; then the cooled seawater was injected to keep the temperature and pressure constant to simulate The real temperature and pressure conditions of the seabed.

[0041] Move the prepared natural gas hydrate se...

specific Embodiment 2

[0048] On the basis of specific embodiment 1, after the crushing of natural gas hydrate sediment particles begins, monitoring the temperature and pressure changes in the kettle body, the phase state changes of natural gas hydrate and the particle size distribution of sediment particles during the crushing process , collect a small amount of fluidized material samples during the fluidization process, and analyze the content of each phase and particle size distribution.

[0049] First, the sampling container is evacuated. During fluidization, the valve connecting the sampling container and the fluidization pipeline is closed. After the fluidization starts, the valve can be opened at any time to obtain a sample of hydrate fluidization. The samples are mainly used for the test of particle size distribution, air content and single-phase ratio of slurry.

specific Embodiment 3

[0050] On the basis of specific embodiment 1 and specific embodiment 2, it also includes a waste pipe connected to the bottom of the excavation tank through a second valve. After the experiment is completed, open the valve connected to the waste tank to collect the hydrate deposits and seawater involved in the tank.

[0051] The implementation scheme of the patent application of the present invention combines the experimental simulation of the experimental process with the numerical simulation, and solves the key technical problems of the excavation and fluidization modules in the solid fluidization mining process of natural gas hydrate in the shallow surface layer of the seabed. The experimental device can be used to analyze the phase state change of natural gas hydrate during mechanical crushing, the influence of different crushing methods on phase state change, the particle size distribution of natural gas hydrate particles under different mechanical crushing conditions, and...

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Abstract

The invention provides a laboratory experiment device and method for solid fluidization exploitation of a gas hydrate. The laboratory experiment device comprises a sea water injection device, an excavation experiment main body module and an experiment data information sampling module. According to the laboratory experiment device and method, a cutter is directly utilized for mechanical crushing of hydrate sediment under the circumstance that the temperature pressure in an exploitation kettle is the same as the actual pressure at the sea bottom, and sea water is injected into the exploitation kettle to ensure that the crushed hydrate particles flow together with the sea water, so that the phase change, the particle diameter distribution and the fluidization effect of the hydrate during mechanical crushing can be simulated, and a theoretical support is provided for solid fluidization exploitation of a non-diagenetic hydrate.

Description

technical field [0001] The invention relates to an indoor experimental device and method for gas hydrate solid-state fluidization mining, in particular to an indoor experimental method and device suitable for subsea non-diagenetic hydrate solid-state fluidization mining and mining. Background technique [0002] Natural gas hydrate is a potential alternative energy source, and its total amount is about twice that of other fossil energy sources. Only the natural gas hydrate resources in the South my country Sea can be used by my country for 362 years. About 85% of the gas hydrates are present in the shallow sediments of the deep seabed in the form of weak cementation (non-diagenetic). In recent years, many countries have carried out in-depth research on natural gas hydrate, and the exploration of efficient exploitation methods of marine natural gas hydrate has become a research hotspot in the world. At present, the exploitation methods of natural gas hydrate include injectio...

Claims

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Application Information

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IPC IPC(8): G01N33/22
Inventor 王国荣王川张亦驰谢真强周旭王雷振
Owner SOUTHWEST PETROLEUM UNIV
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