METHOD FOR DEVELOPMENT OF OIL AND GAS DEPOSITS Russian patent published in 1998 - IPC

FIELD: oil and gas production industry. SUBSTANCE: this relates mainly to development of gas and oil condensate deposits. According to method, bore-holes are drilled throughout deposit. Gas- and oil-saturated intervals are opened with subsequent recovery of oil, gas, condensate, and water from producing wells. Pressure is maintained by injecting dry gas into gas-condensate cap through producing wells. Deposit is developed by drilling systems of producing and injection wells incorporating one vertical and at least two pseudohorizontal bore-holes. They are crossing producing interlayers within limits of oil fringe. Working agent is injected into oil fringe through pseudohorizontal bore-holes of injection well system. Dry gas is injected into gas-condensate cap through vertical bore-hole of aforesaid system. Oil recovery is performed through pseudohorizontal bore-holes and vertical bore-hole of producing well system. Gas and condensate are recovered through vertical bore-hole of aforesaid system. Depth of bed to be opened is selected preliminarily depending on thickness of gas-condensate cap. It is being changed in process of recovery depending on relation of oil and gas outputs. Application of aforesaid method allows for increasing oil and condensate recovery due to prolonging cycling process and maintaining mode of natural gas lift. EFFECT: higher efficiency. 7 cl, 3 tbl, 4 dwg