METHOD FOR OIL DEPOSIT DEVELOPMENT AT LATE STAGE

摘要

FIELD: oil and gas industry.SUBSTANCE: invention is related to oil industry and can be applied in development of oil pool with different type of reservoirs. The concept of the invention is as follows: method consists in drilling vertical pressure wells and horizontal producers, in pumping displacement agent through pressure wells, and in withdrawal of production via horizontal producers. At that the horizontal well is drilled above water-oil contact (OWC) level and the vertical one - at distance of at least 50 m from bottom hole of the horizontal well. Completion of deposit in the vertical well is made above and below of the horizontal producer. Completion in the vertical well above horizontal borehole is made with bigger density of penetrated holes than during completion below horizontal borehole in order to create more even flood front.EFFECT: method provides improving of oil recovery and efficiency in oil displacement.1 dwg, 1 ex