METHOD OF OIL POOL DEVELOPMENT Russian patent published in 2009 - IPC E21B43/22 

FIELD: mining.

SUBSTANCE: method of oil pool development consists in pumping working agent via pressure wells, in withdrawal of production via producing wells and in periodic pumping surface active substance - SAS through pressure wells; as SAS, water soluble SAS in form of water solution of 5-10% concentration is used; it is heated in day light to 40-100°C; fringes of SAS solution are pumped to bottomhole of pressure well via thermo-isolated pipes increasing volume and concentration of solution in each following fringe; SAS solution fringe is pumped into reservoir with working agent in volume not less, than volume of preceding fringe; between pumping of fringes process conditioning is performed during 5-10 days; also total volume of SAS solution is determined from 0.25 to 1.0% of pore volume of section of development and is divided into minimum two parts for evaluation of fringes volume so, as to meet the condition where - is volume of the first fringe of solution with concentration C₁, m³, - is volume of the second fringe of solution with concentration C₂ higher, than C₁, m³, - volume of the third fringe of solution of concentration C₃ higher, than C₂, m³.

EFFECT: increased oil output.

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