DEVELOPMENT METHOD OF HIGH-VISCOSITY OIL DEPOSIT Russian patent published in 2014 - IPC E21B43/16 

FIELD: oil and gas industry.

SUBSTANCE: invention refers to oil producing industry. In development method of high-viscosity oil deposit that includes drilling of vertical injection wells and horizontal directional producers, pumping of operating fluid through injection wells and oil withdrawal through producers, determination of oil-water contact (OWC) level the horizontal directional producer is drilled from mouth to downhole at the level at least per 2-3 m higher than OWC level; vertical injection well is drilled so that its downhole is located over producer downhole per 5-8 m. The producer is perforated along it hole length while the vertical injection well is perforated in the stratum area in direction towards the producer mouth. Stage by stage as operating fluid breaks through or water cut exceeds 95% downhole of the horizontal directional producer is cut off above the breakthrough or watercut area and the area of injection well penetration is cut off from below per 1/3 - 1/2 of its whole length. When production of the production area is completed the mouth of horizontal directional producer is placed under pressure of operating fluid.

EFFECT: working efficiency in the deposit with inclined oil-water contact, reducing watercut rate of the product extracted from the deposit, excluding breakthrough of heat carrier to the producer with simultaneous reduction of expenditures as construction of additional injection well is excluded.

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