FIELD: methods or devices for use in mines or tunnels, not covered elsewhere, particularly modification of mine passages or chambers for storage purposes, especially for liquids or gases.
SUBSTANCE: method involves drilling wells in deposit and developing thereof by partial separated produced gas return. Gas extracted from deposit with high light-weight methane fraction content is returned through production wells into roof area of deep sited deposit at final deposit development stage under pressure less that saturation pressure to form gas cap. Underground natural gas storage is created in the gas cap.
EFFECT: decreased costs for storage creation, decreased storage creation time, increased coefficient of final hydrocarbon recovery in oil field developed by natural pressure depletion without tank gas and other valuable hydrocarbons output volume with the use of common production equipment.
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