Recovery device and method of shale gas

Abstract

The embodiment of the invention discloses a recovery device and method of shale gas, and relates to the technical field of energy extraction. The recovery device comprises a controller, a hole detection mechanism, an inherent frequency detection mechanism and a vibration generating mechanism; the inherent frequency detection mechanism detects the inherent frequency of a destination layer where perforation holes are located and sends the inherent frequency to the controller; through artificial intelligence control, the vibration frequency of the vibration generating mechanism is adjusted to enable the destination layer to resonate, under a resonant state, methane molecules adsorbed on the surface of a shale matrix are induced to be desorbed, thus the desorbed gas amount is increased, and meanwhile micro fractures continue being generated along the shale bedding surface and continuously extend towards the far end; the permeability of shale of the part is effectively improved, and then the recovery rate of unconventional natural gas is increased; and the condition for generating pressure expansion can further be caused in the shale, thus the tail ends of micropores in the shale continue being fractured and expanded internally to form shale gaps and cracks, and the diffusion and desorption processes of the shale gas are accelerated so as to increase the recovery rate of a shale gaswell.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of energy exploitation, and in particular to a shale gas recovery device and method. Background technique [0002] How to efficiently extract shale gas from the ground at low cost has become a bottleneck restricting the development of shale gas in my country. At present, the cost of shale gas development in my country is very high. The cost of each horizontal well is 60-80 million yuan, and the gas production capacity of different formations varies. [0003] The development of unconventional natural gas (shale gas, coalbed methane, etc.) in China faces many problems. How to increase single well production and reduce mining costs is the main problem currently facing the development of shale gas (coal bed methane, etc.) in my country, and its core content is the improvement of shale reservoirs. Compared with the United States, there are great differences in the enrichment, preservat...

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Problems solved by technology

[0005] For this reason, the embodiment of the present invention provides a shale gas recovery device and method to solve the problems in the prior art that the shale gas single well yield is low and the production cost is high, which seriously restricts the development of shale gas in my country.

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