Experimental simulation device for mining hydrate based on multi-branch hole technology

Abstract

The invention discloses an experimental simulation device for mining hydrate based on multi-branch hole technology, which comprises a multi-branch hole mining unit, a temperature control unit, a gas injection unit, a liquid injection unit, an outlet separating and metering unit, a gas recovery unit and a data acquisiting and processing unit, the data acquisiting unit acquires relevant data of thetemperature control unit, gas injection unit and liquid injection unit and the like, and achieves the control of the temperature control unit, gas injection unit and liquid injection unit; multi layers of horizontal branch holes are arranged around through tapping at the lateral side of a central main well net, the horizontal branch holes are driven by the central main well net to jointly reduce the pressure for hydrate exploitation, the design form of the multi-branch holes is utilized to effectively increase the discharge area of the hydrate reservoir, and can completely simulate the formation of the hydrate reservoir, the layout of multi-branch holes, the pressure reduction of the multi-branch holes, the sand prevention and clogging prevention, the separation of gas-water-sand, and other processes, detailed experimental data is provided for detailed understanding of the mining efficiency and production characteristics and the like of the sea water hydrate multi-branch holes, and a theoretical basis for achieving the efficient mining, productivity evaluation, development scheme and process design optimization of the hydrate is provided.

Description

technical field [0001] The invention belongs to the field of experimental research on the development of marine natural gas hydrate resources, and specifically relates to an experimental simulation device for mining hydrates based on multi-branch hole technology, which provides a simulation experiment platform for establishing a new type of hydrate mining and production increase technology. Background technique [0002] Existing survey results show that natural gas hydrate resources are huge, and the estimated reserves are at least twice the sum of traditional oil and natural gas. 99% of the world's gas hydrate resources are stored in the ocean, so establishing an efficient and reliable offshore gas hydrate test recovery technology is the key to realizing the commercial utilization of resources. Up to now, Japan and China have carried out trial production of natural gas hydrate resources in sea areas three times, all of which are based on process design based on depressuriza...

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Problems solved by technology

[0004] Different from the field of conventional oil and gas production, in the field of marine natural gas hydrate resource development and research, due to the different application fields, high-pressure and low-temperature environments, and hydrate test production simulation experiment methods, etc., the design and application of multi-branched holes are also subject to many restrictions.

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