A method and device for producing hydrates by combining pressure reduction and hydraulic fracturing technology
A hydraulic fracturing and hydrate technology, which is applied in the fields of mining fluids, earth drilling, underground mining, etc., can solve the problems of unformed natural gas hydrates, etc., and achieve control of mining speed and changes in reservoir permeability, low mining costs, The effect of mature technology
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[0022] as attached figure 1 As shown, first, a production well 12 is constructed above the underlying sediment layer 1 of the gas hydrate, so that it runs through the gas hydrate reservoir 2, the overlying sediment layer 11 of the gas hydrate, and the seawater layer 13. In the production well 12 The sand filter device 17 and the reservoir in-situ gas-liquid separator 8 are arranged at the lower gas pumping part, and the flow valve 9 is arranged on the reservoir in-situ gas-liquid separator 8. At the same time, the fixed casing parts and the well wall of the production well 12 are arranged. The isolation equipment 10 is arranged in the wellbore of the production well 12 to arrange the dual wellbore casing string 14 for liquid injection / gas pumping and other functions, and the hydraulic pressure is set in the second section of the natural gas hydrate reservoir of the double wellbore casing string 14. Fracturing and perforating equipment, including a fracturing booster 5 and a je...
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