METHOD FOR HEAT DISPLACEMENT OF OIL FROM HORIZONTAL WELL Russian patent published in 1996 - IPC

FIELD: oil production with use of heat, mainly, from reservoirs with heavy, high-viscosity or bitumen oil in combination with drilling the horizontal wells. SUBSTANCE: installed into drilled well with horizontal bore is casing string, casing string-to-borehole annulus is cemented above the horizontal bore. Casing string is perforated by circular generating lines in end part and at the beginning of horizontal part, just before cementing plug. Tubing is run and centered in casing string by means of packer which is installed behind the first group of perforations. Heat carrier is supplied through tubing, and the product is withdrawn through the second group of perforations, and transported through tubing-to-casing annulus. EFFECT: reduced energy consumption and higher operate reliability due to local optimization of the process. 1 dwg