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

FIELD: oil production industry. SUBSTANCE: according to method, oil is recovered through producing wells, and working agent and solution of polymer are periodically injected through injection wells. At later stage of developing deposit, some of watered producing wells are converted into injection wells. Coefficient of productivity is determined in these wells. Injected into them is solution of polymer with viscosity which is proportional to ratio of productivity coefficient of given well to average coefficient of productivity of wells within deposit or its section. In this case, ensured is equality of ratios of wells productivity and viscosity of polymer solutions injected into well. EFFECT: higher efficiency. 1 cl