METHOD FOR DEVELOPMENT OF NONUNIFORM OIL DEPOSIT Russian patent published in 1998 - IPC

FIELD: oil production industry. SUBSTANCE: increase of oil recovery due to involvement in development of stagnant and blind zones with deteriorated collector properties can be achieved by method which implies drilling of designed number of injection and producing wells, watering and recovery of oil to surface with subsequent drilling of additional wells with view to volumetric nonuniformity of bed which is determined according to results of operating deposit, and by means of simulation procedure. Additional wells are drilled from horizontal wells or horizontal holes are drilled from old wells. Horizontal holes are drilled along line which connects stagnant areas of oil, and at presence of displacement zones, blind zones or zones with lower collector properties - along line connecting these zones. EFFECT: high efficiency. 2 dwg