PROCEDURE FOR DEVELOPMENT OF HIGH VISCOUS OIL Russian patent published in 2009 - IPC E21B43/24 

FIELD: mining.

SUBSTANCE: at development of oil field there is performed pumping of oxidant via pressure wells, in-situ combustion and withdrawing of production through producing wells. As producing wells there are used horizontal wells with a horizontal borehole in a sub-face of the oil reservoir. Vertical pressure wells are placed in the cross section and end part of the horizontal borehole. Pumping of fuel is carried out through the nearest to a horizontal vertical wells, while air is pumped via the remote wells. Bottomhole pressure of air pumped into well is set above the bottomhole pressure of pumped fuel. Pumping of fuel to the nearest to horizontal vertical wells and air into the remote ones is alternated with pumping of water in volumes allowing maintaining of reservoir combustion.

EFFECT: increased efficiency of process of replacement of high viscous oil by means of increased vertical sweep with effecting agent due to successive development of whole reservoir.

1 ex, 1 tbl, 2 dwg, 2 cl