DEVELOPMENT METHOD OF HIGH-VISCOSITY OIL DEPOSIT AND BITUMENS, AND DEVICE FOR HEAT DISPLACEMENT OF PRODUCT FROM HORIZONTAL WELLS Russian patent published in 2012 - IPC E21B43/24 

FIELD: oil and gas industry.

SUBSTANCE: development method of high-viscosity oil deposit and bitumens involves drilling of the well with horizontal shaft, lowering to the well of casing string with perforated section in horizontal section, cementing of annular space to horizontal shaft and installation of tubing strings in casing string. Tubing string is aligned with isolation of annular space by means of packer in horizontal shaft. Heat carrier is pumped through end part of casing string. At that, horizontal shaft is drilled in the form of two parallel initial and end sections connected by means of an arc-shaped section. Before the tubing string is lowered to casing string, there lowered is production string with outlet channels arranged in end section of horizontal shaft, inlet channels arranged in initial section of horizontal shaft, and external packer. Packer is arranged between inlet and outlet channels and isolates the space between casing and production strings. Additional packer isolates the well space above horizontal shaft. After the tubing string interconnected with outlet channels and pre-equipped with partition and bypass valve, which are located closer to the working face against interconnection with outlet channel, is lowered, packer is installed between production string and tubing string and located between inlet and outlet channels of production string. At that, pumping of heat carrier is performed via tubular annulus between production string and tubing string through bypass valve, and extraction of products - via tubing string.

EFFECT: enlarging the deposit coverage area and increasing its warming-up efficiency.

2 cl, 3 dwg