DEVELOPMENT METHOD OF HIGH-VISCOSITY OIL DEPOSIT WITH USE OF IN-SITU COMBUSTION Russian patent published in 2011 - IPC E21B43/243 

FIELD: oil and gas industry.

SUBSTANCE: method involves pumping of oxidiser through vertical injection wells located at the distance excluding oxidiser and fuel breakthrough from horizontal part of production well, arrangement of in-situ combustion and extraction of products through horizontal production wells. Horizontal production well is drilled near bottom of productive formation, and vertical injection wells are drilled in direction to shaft of horizontal production well with column lowering below level of oil-water contact and with installation of packer above perforation level. Fuel, polymer non-combustible water-soluble material is pumped in turn till plug is formed in shaft of injection well, and oxidiser is pumped to water-carrying part of productive formation. When wellhead pressure reaches allowable parameters, as well as when formation temperature increases over breakthrough temperature, additional pumping of water is performed in volumes required for maintenance of controlled in-situ combustion.

EFFECT: improving oil recovery.

1 dwg, 1 ex