STEPWISE HELICAL HEATING OF HYDROCARBON-CONTAINING RESERVOIRS Russian patent published in 2012 - IPC E21B43/24 

FIELD: oil-and-gas production.

SUBSTANCE: proposed method comprises the following steps: processing reservoir first zone and starting processing of several reservoir zones after starting the processing of said first zone. Processing of, at least, two sequentially processed zones is started at selected time moment after starting processing of previous zone. At least, two sequentially processed zones adjoin the previous processed zone. Sais sequential processing is performed in, in fact, outward helical direction from first zone toward boundary of processing zone. Note here that processing of, at least, two zones comprises the stages whereat: heat is fed from one or several heaters arranged at two or several first zone sections. Some quantity of heat is transmitted from, at least, two first sections to two or several second section of the zone. First and second sections are located inside zone in compliance with pattern shaped as chess board. Note here that, in said pattern, at least one of the first sections is, in fact, surrounded by three or several the second sections, while at least one of second sections is surrounded by, in fact, three or several first sections. Some quantity of hydrocarbons is extracted at second sections. Note here than some quantity of hydrocarbons from second sections comprises fluids from first sections.

EFFECT: higher efficiency.

19 cl, 7 dwg