METHOD OF DEVELOPING OIL DEPOSITS WITH ELEVATED-VISCOSITY OILS Russian patent published in 1999 - IPC

FIELD: oil and gas production. SUBSTANCE: method includes boring holes, opening productive strata, producing crude oil, watering formation using injection wells, and pumping in gas into formation. In particular, gas is pumped in into productive well, or into all neighboring productive wells, or successively into all wells of oil deposit. Gas pumping is carried out until first portions of gas reach formation top. Gas pumping and oil production are carried out periodically. Duration of gas pumping and oil production periods provides maximum accumulated oil production during specified period. EFFECT: increased well debit. 2 cl, 4 dwg, 3 tbl