METHOD FOR WATERING OF OIL DEPOSIT Russian patent published in 1998 - IPC

FIELD: oil and gas production industry. SUBSTANCE: this is aimed at prolonging production of flowing well liquid and increasing embracing by watering of deep-lying deposit saturated with light oil. For this purpose, performed is alternate stopping and starting of two groups of injection wells into which injected is slightly alkali brine water. In first half-cycle, stopped is first group of injection wells with simultaneous stopping of producing flowing wells in which counter-pressure at buffer is higher than pressure in discharge line by 4-10%. Operation of entire production setup is effected in half-cycle of injecting slightly alkali brine water by means of first group of injection wells with simultaneous stopping of second group of injection wells. EFFECT: high efficiency. 4 tbl