METHOD FOR DEVELOPMENT OF OIL POOL Russian patent published in 1997 - IPC

FIELD: oil production industry. SUBSTANCE: this can be used at area-spread injection of working agent and taking oil from pool. Injection and producing wells are arranged according to uniform triangular scheme with formation of areal 13-point development components with central injection well and concentric rows of injection and producing wells. Oil is taken through six producing wells of internal concentric row. Working agent is pumped through injection wells in cyclic manner with equal amount in every cycle in four stages. At first stage, working agent is pumped through central and three injection wells of outer concentric row located after every other one with stoppage of three other injection wells. At second stage, working agent is pumped through central and three injection wells of outer concentric row which were stopped at stoppage of three wells through which working agent was pumped at first stage. At third stage, working agent is pumped through central injection well with stoppage of all six wells of outer concentric row. At fourth stage, working agent is pumped through six wells of outer concentric row with stoppage of central injection well. Amount of working agent to be pumped is distributed between injection wells of outer concentric row and central injection well in proportion of difference between unit and coefficient of included area of development by displacement to coefficient of included area of development by displacement. EFFECT: high efficiency. 1 cl, 1 dwg