METHOD FOR DEVELOPMENT OF HIGH-VISCOSITY OIL OR BITUMEN Russian patent published in 2016 - IPC E21B43/24 E21B43/22 

FIELD: oil industry.

SUBSTANCE: invention relates to oil industry. Development method for high-viscosity oil or bitumen deposit involves construction of pairs of stacked horizontal production and injection wells, as well as additional horizontal wells, pumping of heat carrier through injection wells with heating of productive formation and creation of steam chamber, extraction of products due to steam assisted gravity drainage via production wells and control of steam chamber state. Development of oil or bitumen deposit is performed with control of current size of steam chamber by changing the volumes of heat carrier pumping to injection wells and withdrawal of fluid from production wells with monitoring of steam chamber volume. Superheated steam is used as heat carrier or steam with inert gas. Additional well is built between production and injection wells in the range from 1/3 to 2/3 of distance between them. Solvent is pumped only via additional well in zones of least heating. Control of steam chamber state is performed by reading thermogram in horizontal production well with additional identification of the least heating zones.

EFFECT: technical result is increase of yield and oil recovery factor at lower costs for warming of formation zones not covered by heating and extraction, solvent saving due to selective injection.

1 cl, 1 dwg, 1 ex