OIL RESERVOIR DEVELOPMENT METHOD Russian patent published in 2007 - IPC E21B43/22 

FIELD: oil industry, particularly to increase oil recovery from non-uniform reservoirs, namely high-temperature reservoirs, and from reservoirs with viscous and highly-viscous oil due to increased conformance and oil displacement factor.

SUBSTANCE: method involves flooding reservoir; producing oil through producing wells. Aluminum hydrochloride, namely waste product obtained during benzol alkylation with olefins, as well as buffer liquid and aqueous alkali solution are alternately injected in watered reservoir. Aluminum hydrochloride contains 0.05-10% of surfactant. Aqueous alkali solution also has 0.05-10% of surfactant. The buffer liquid is 0.05-10% aqueous surfactant solution. The aqueous alkali solution is modified alkali off-flow generated during caprolactam production. The aluminum hydrochloride containing above additive is activated aluminum hydrochloride.

EFFECT: increased oil production due to increased efficiency of high-permeable reservoir zones treatment by means of reservoir permeability reduction and final residual oil sweeping by gelling reagent injection through injection and producing wells to create gel mass with high structural-and-mechanical and oil-sweeping properties directly in reservoir conditions.

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