METHOD OF OIL POOL WATERFLOODING Russian patent published in 2001 - IPC

FIELD: oil producing industry, particularly, methods of waterflooding of oil pools. SUBSTANCE: injection of displacing agent into injection wells is carried out up to pressure rise in formation for 5-10% of running formation pressure before performance of hydraulic fracturing and during periodic stopping of injection. In so doing, duration of injection of displacing agent is determined with due consideration to distance between injection and producing wells and piezoconductivity of nonwaterflooded formation. EFFECT: higher efficiency of method due to increased sweep of formation waterflooding and development of low-permeable interlayers.