DEVELOPMENT METHOD OF SUPER-VISCOUS OIL DEPOSIT Russian patent published in 2019 - IPC E21B43/24 E21B7/04 

FIELD: oil industry.

SUBSTANCE: development method of super-viscous oil deposit includes construction in lower bed above water-oil contact of horizontal production well with ascending additional shafts, above which is built an injection well with horizontal or ascending additional shafts, pumping of heat carrier into both wells prior to heating of intersurface space of productive formations, pumping of heat carrier into injection well and extraction of product from production well. Additional shafts of production and injection wells are drilled with length from 50 to 300 m, are built one above another with shortest distance between them at least 2 m. At the same time the faces of additional shafts of the production well are located above the main shaft at the absolute mark by 2–5 m, and the pressure well - by 0–3 m, after which the side boreholes are equipped with casing strings.

EFFECT: technical result is higher efficiency of development method, reduced heat loss, increased oil production due to increased zone of drainage of formation with simultaneous reduction of material costs.

1 cl, 2 dwg