METHOD OF DEVELOPING OIL DEPOSITS Russian patent published in 1999 - IPC

FIELD: oil producing industry; may be used in intensification and development of oil deposits with low-permeable reservoirs. SUBSTANCE: method includes stimulation of oil-bearing formation by injection of displacement agents through injection wells and withdrawal of formation products through producing wells with shutoff of highly water-encroached zones and hydrophobization of productive zone of producing well. Shutoff of water-encroached zones is effected by injection into them of polyacrylamide with concentration of 0.01-1.0 wt.%. Hydrophobization of productive zone of producing well is effected by injection of water drive-off composition based on hydrocarbons with consumption of 1.5 cu.m per meter of formation thickness, hydrocarbon solvents with consumption of 0.5-5.0 cu.m per meter of formation thickness and acid with consumption of 0.1-0.5 cu.m per meter of formation thickness. Hydrophobization composition is displaced into productive zone of producing well by water-free degassed oil with flow rate of 4-6 cu.m/h. Then, well is closed to stay for 8-24 h. EFFECT: higher oil production and increased oil recovery from formation. 2 cl