METHOD OF BITUMEN DEPOSIT DEVELOPMENT WITH HORIZONTAL WELLS WITH DISTRIBUTED PERFORATION Russian patent published in 2020 - IPC E21B43/24 E21B7/04 E21B47/06 E21B43/08 

FIELD: oil industry.

SUBSTANCE: invention relates to the oil-producing industry. In method of bitumen deposit development with horizontal wells with distributed perforation, including drilling of steam-injection horizontal well and located in parallel, horizontal production well, cementing of shafts and secondary opening of formations, pumping of steam into injection well and withdrawal of product from production well, pressure variation is calculated along horizontal boreholes, horizontal bores are divided into intervals of 10–50 m, in the production and/or injection wells sizes of perforated holes and their density are made so that in each interval, depression or, respectively, repression on the formation differed by not more than 5 %, a horizontal filter is made in the horizontal perforated shaft of the production well, which is a pipe with multiple slit-like holes located perpendicular to the axis of the pipe. Width of holes is 100–200 mcm, distance between holes is 100–500 mcm, and length is 0.2–0.9 of filter circumference.

EFFECT: technical result is increase of oil recovery of bitumen deposit, prevention of ingress of sand into production well shaft, increase in overhaul period of well operation.

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