METHOD FOR DEVELOPMENT OF NON-UNIFORM FORMATIONS Russian patent published in 2017 - IPC E21B43/243 

FIELD: oil industry.

SUBSTANCE: invention relates to oil industry. Method for development of non-uniform formations, which involves pumping displacement agents through injection wells and treatment of bottom-hole zones of wells by in-situ combustion, during development of non-uniform formations, represented by different-permeability formations (interlayers) separated by impermeable webs of unproductive rocks with thickness from 0.5 to 3 m, during treatment of bottom-hole zones of wells by in-situ combustion, temperature of combustion front is maintained at a level and during a time sufficient for creation of development zone permeability in impermeable webs of unproductive rocks and providing vertical filtration of fluids through created zone, wherein situ combustion is initiated in reservoir (interlayer) with minimum permeability.

EFFECT: improving coverage of displacement and oil recovery, lower costs of displacement agent on oil production due to more rational use of heat introduced into formation.

5 cl, 2 dwg, 2 ex