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

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...

AI Technical Summary

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 resulting impact on the phase stability of hydrates, hydration after crushing The particle size distribution of gas hydrate particles, the proportion of seawater required for hydrate fluidization, the drillability evaluation of gas hydrate deposits, etc.

Images