METHOD FOR EXTRACTING OIL DEPOSIT WITH CARBONATE MANIFOLDS OF LOW PRODUCTIVENESS Russian patent published in 2004 - IPC

FIELD: oil extracting industry. SUBSTANCE: according to the method operation, force-pumping and water-intake wells are placed in a shrub. Square placement of wells is performed using even triangular mesh 400X400 meters. Pumping of working substance through force- pumping wells is performed according to seven-point scheme in cyclical mode. As working substance highly mineralized, thermal, layer water of lower levels is used. Pumping pressure is kept at 0.6 of mountain pressure. At collars of force- pumping wells pressure is kept at 3.0-6.0 megapascals. Intake and pumping of layer water is performed by immersible pumps in cyclical mode with periodical pumping of microbiological composition based on dry active silt into the layer. According to amount of water in operating wells, additional extraction of oil deposits in interwell space is performed by boring additional side branch wells from submerged wells. EFFECT: increased oil yield of oil deposits of complicated geological composition with minimum manifolds parameters and increased oil viscosity. 1 tbl, 1 ex, 1 dwg