Method and device for exploiting aquo-complex through combination of pressure reducing technology and hydraulic fracturing technology
A hydraulic fracturing and hydrate technology, which is applied in the fields of mining fluid, earth drilling, underground mining, etc., can solve the problem of unformed natural gas hydrate, etc., and achieve control of mining speed and changes in reservoir permeability, simple mining technology, The effect of low mining cost
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[0022] as attached figure 1 As shown in the figure, first, a production well 12 is constructed on the underlying sediment formation 1 of natural gas hydrate, so that it runs through the natural gas hydrate reservoir 2, the natural gas hydrate overlying sediment layer 11 and the seawater layer 13. The sand filter device 17 and the in-situ gas-liquid separator 8 of the reservoir are arranged at the lower pumping part, and the flow valve 9 is arranged on the in-situ gas-liquid separator 8 of the reservoir. The isolation and sealing equipment 10 is arranged in the wellbore of the production well 12 with a double wellbore casing string 14 for liquid injection / gas pumping and other functions, and hydraulic pressure is set in the second section of the natural gas hydrate reservoir of the double wellbore casing string 14 The fracturing and perforating equipment includes a fracturing booster 5 and an injection nozzle 6 facing the well wall of the production well 12, and a perforation c...
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