METHOD FOR EXPLORATION OF MULTI-SEAM OIL DEPOSIT WITH RESERVOIRS OF DIFFERENT STRUCTURE TYPE Russian patent published in 1997 - IPC

FIELD: oil production. SUBSTANCE: displacement fluid is pumped in separately through different wells and product is extracted jointly through development wells. Filtering-capacity characteristics of each seam are determined before exploitation. Then functions of the characteristics on injection bottom hole pressure and seam pressure are plotted. Intervals of optimum injection pressure and seam pressure for each seam are determined on the base of the obtained functions. The product is pumped in separately and extracted jointly in exploitation on filtering modes corresponding to optimum values of injection pressure and seam pressure between zones of injection and extraction. EFFECT: lower exploitation costs. 5 dwg, 5 tbl