METHOD FOR DEVELOPMENT OF FLOODED NON-UNIFORM OIL BED Russian patent published in 1998 - IPC

FIELD: oil production industry. SUBSTANCE: according to method, injected are water suspensions of wood flour and clay. They are injected successively or simultaneously or water suspensions of wood flour and clay are injected at condition of Fc/Fi ≤ 4, where Fc - current injectivity factor (ratio of value of current injectivity factor to current pressure at well head); Fi - initial injectivity factor (ratio of value of initial injectivity to pressure at which velocities of injecting water suspensions exceed velocities of settling dispersed particles of wood flour and clay) with orientation of wood fibres in direction of flow of water suspensions. EFFECT: higher efficiency. 1 tbl