Microscopic simulation device for natural gas hydrate drilling and production

Abstract

The invention relates to the technical field of natural gas hydrate drilling and production, and discloses a microscopic simulation device for natural gas hydrate drilling and production. The microscopic simulation device for natural gas hydrate drilling and production can realize microscopic simulation for the heat and mass transfer process occurred along with the phase change of a hydrate in a reservoir by using a microfluidic technology, thereby providing a simulation platform for efficient and in-depth study of the phase change and flow law of the hydrate in the reservoir and the law of heat and mass transfer between a reservoir stratum and a shaft, providing theoretical support and optimization suggestions for the actual exploitation of the hydrate, and thus improving the recovery ratio and reducing the accident risk caused by the phase change of the hydrate.

Description

technical field [0001] The invention relates to the technical field of natural gas hydrate drilling and production, in particular to a microcosmic simulation device for natural gas hydrate drilling and production. Background technique [0002] Natural gas hydrate is a clathrate complex formed by the interconnection of water molecules to capture small molecular gases. It has abundant reserves, and its organic carbon content is close to twice that of traditional fossil energy; it is widely distributed, with 27% in nature The surface area of ​​China's land and 90% of the sea area can meet the conditions for hydrate occurrence; the energy density is high, and a unit volume of natural gas hydrate can be decomposed to generate 164 volumes of natural gas; and the products after combustion are relatively clean, so it is regarded as a very promising future. The prospect of alternative energy is of great significance to alleviating the energy crisis and enriching the energy structure....

AI Technical Summary

Problems solved by technology

[0004] At present, the simulation research on natural gas hydrate is mainly based on the pure liquid phase environment or the pure porous medium environment. The model is too macroscopic, and it is impossible to fully understand the microscopic behavior of hydrate particles in pores and channels, and it is impossible to understand the hydrate in the reservoir. Phase transition and flow law, as well as the mechanism and law of coupled heat and mass transfer between reservoir and wellbore during drilling fluid circulation

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