METHOD FOR DEVELOPMENT OF MULTIBED OIL DEPOSIT AT UNSTEADY CONDITIONS Russian patent published in 1999 - IPC

FIELD: oil production industry. SUBSTANCE: method relates to development of oil deposit with differently permeable reservoirs. According to method, evaluated are average values of filtration capacity characteristics of oil beds. Oil is recovered from beds through producing wells. Water is injected in cyclic operation with selection of cycle duration, and oil bed is worked out. Bed is divided into groups. Estimation of average values of filtration capacity characteristics is performed for every group. Included in first group are beds with higher permeability. Second group includes less permeable beds. Duration of water injection cycle is selected basing on conditions of ensuring minimal difference in averaged speeds of moving fronts of displacement through beds of productive reservoir of first and second group. Application of aforesaid method ensures increase of current oil production together with larger oil recovery from beds. EFFECT: higher efficiency. 2 cl, 3 dwg, 2 tbl