PROCESS OF EXPLOITATION OF OIL FIELD Russian patent published in 2000 - IPC

FIELD: oil industry, exploitation of multipool oil field at latest stage. SUBSTANCE: working substance is pumped through central injection hole during running of oil field and oil is extracted through production wells arranged over circumference. Unheated or heated polymer solution is used in the capacity of working substance. Flooded and oil-saturated formations are determined in wells. Side horizontal holes are drilled from most flooded production wells into oil-saturated formations perpendicular to forcing flow from central injection hole towards undeveloped oil zones. Horizontal holes are drilled into oil-saturated formations between central injection hole and circumference of surrounding wells in points where side horizontal shafts were not drilled. Horizontal shaft is arranged perpendicular to forcing-out flow from central injection hole towards zone of increased oil saturation. At initial stage central injection hole is used as production well. EFFECT: increased oil recovery. 1 cl, 1 dwg