A shale gas extraction system using wind power

Abstract

The invention provides an exploitation system utilizing wind power generation for shale gas. The exploitation system comprises a steam generator, an inner tube and a sleeve, wherein the inner tube issleeved with the sleeve, and the sleeve is arranged in a shale gas storage layer; steam generated by the steam generator enters the sleeve through the inner pipe, shooting cracking holes are formed inthe wall surface of the sleeve; the exploitation system is characterized by further comprising a wind power generation device, the wind power generation device is electrically connected with the steam generator, generated electric energy is used for heating the steam generator, and water is input into the steam generator through a water supply tank, is heated into the steam in the steam generatorand enters the inner pipe. According to the exploitation system, the electric energy generated by wind energy power generation is fully used for heating to generate steam, solar energy is applied toexploitation of the shale gas, so that energy is saved, meanwhile, water resources are saved, and therefore development cost of the shale gas in the water-deficient area is greatly reduced.

Description

Technical field [0001] The invention relates to a shale layer mining technology, in particular to a shale gas mining technology using wind energy to generate electricity. Background technique [0002] Shale is a kind of sedimentary rock with complex composition, mainly composed of clay deposited by pressure and temperature. Shale gas is a gas mainly composed of methane stored in the nanopores of shale. Shale gas is mostly stored in shale in free state and adsorbed state, and the proportion of these two forms of shale gas is significantly different under different geological conditions. The larger the pore size of the shale, the more free shale gas can be stored, and the higher the organic content of the shale, the more adsorbed shale gas can be stored. Most of the existing shale gas is stored underground at a depth of 1-2 kilometers (the pressure is about 10-20MPa, and the temperature is about 338-378K). [0003] Shale gas is mainly composed of methane, which is an important cle...

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Problems solved by technology

However, most of China's shale gas deposits are distributed in Xinjiang, Inner Mongolia, Sichuan and other water-scarce areas, so it is not realistic to use hydraulic drilling technology on a large scale

In addition, hydraulic drilling technology also has potential safety hazards of polluting groundwater and soil resources

[0006] In the prior art, for example, CN106884637A discloses a method for exploiting shale gas using heat pipes, which uses heat pipes to transfer heat from hot dry rock formations to shale gas reservoirs for heating, thereby promoting the exploitation of shale gas. The heat absorption capacity of the heat pipe in the method is insufficient, and in this case only a single gravity heat pipe is arranged up and down, resulting in insufficient heat absorption surface of the heat pipe, and the heat absorption capacity is limited

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