FIELD: oil-and-gas industry.
SUBSTANCE: in compliance with this method, well is shut in to open casing and linear gate valves for pumping highly mineralised water into annular space. Casing valve is closed to release excess pressure for pumping of highly mineralised water into seam in preset amount at 7.5-10.0 MPa. Pumping is stopped to close the well and to level the pressure for uniform distribution of highly mineralised water in the seam water-flooded zone. Well is started to run it to constant duty for up to 5 days. Well is operated at seam depression of 0.5-1.5 MPa. Volume of injected highly mineralised water is defined by analytical expression.
EFFECT: higher efficiency.
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