METHOD OF WORKING OIL DEPOSIT WITH VARIOUS PERMEABILITY OF CLAY-CONTAINING COLLECTORS Russian patent published in 1997 - IPC

FIELD: oil and gas production industry. SUBSTANCE: method implies pumping into stratum of working agent water solution through pumping well, pumping of stabilizing reagent into stratum through productive well. Before pumping working agent water solution into stratum, interlayers in productive well are divided according to initial permeability into high-permeable, medium-permeable and low-permeable with subsequent pumping of stabilizing reagent into low-permeable interlayers. According to displacement of the front of working agent working solution which is detected at well mouth due to increased watering of productive well yield, selective isolation is performed of watered interlayers except last interlayer with minimal initial permeability. EFFECT: high efficiency. 1 tbl