METHOD OF OIL POOL DEVELOPMENT Russian patent published in 2014 - IPC E21B43/243 E21B43/22 C09K8/94 

FIELD: oil and gas industry.

SUBSTANCE: invention is related to the oil industry, in particular, to development methods of oil pools with reservoirs difficult to recover using thermal oil recovery methods. In the development method of an oil pool with reservoirs difficult to recover, which is implemented by the injection of an oxidiser and water fringes to injectors and by oil extraction from producers, before the oxidiser injection to the formation an aqueous solution of carbonic acid normal salt with a water-soluble acrylic polymer and an acid bath are injected to the formation. Besides, the injection of the aqueous solution of carbonic acid normal salt with the water-soluble acrylic polymer and the acid bath to the formation is made by turns, in cycles, in order to obtain the required volume of the fringe. When gas is broken to the producers, the highly permeable intervals of the formation are isolated.

EFFECT: improved efficiency of the method at the development of oil pools with normal and high viscosity due to the generation of the area with the required oil saturation, reduced fuel consumption for maintenance of the combustion process, more complete usage of the oxidiser and safer development of the pool with inhomogeneous and fractured reservoirs, increased coverage of the formation area with the combustion and displacement process.

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