METHOD FOR DEVELOPMENT OF OIL DEPOSITS AT STAGE OF THEIR FLOODING Russian patent published in 1999 - IPC

FIELD: oil production industry. SUBSTANCE: method can be used in operations aimed at enhancing general oil output and oil recovery from beds. According to method, undertaken is treatment of bottom-hole zone of injection well. Used in working procedure is alternating injection of proportions of calcium chloride, sodium silicate, and water. Water is injected as initial proportion and final proportion and also between other proportions. Used in water proportions or in all proportions is wood flour. At injectivity of injection well reaching 200 cu.m/day, wood flour is used in initial and final water proportions. At injectivity value being within range of 200-400 cu. m/day, wood flour is used in all water proportions. At injectivity of injection well exceeding 400 cu.m/day, wood flour is used in all proportions and in similar concentrations. EFFECT: higher efficiency. 1 cl