BOTTOMHOLE FORMATION ZONE TREATMENT COMPOSITION Russian patent published in 2003 - IPC

FIELD: oil and gas production. SUBSTANCE: composition with increased structural viscosity, increased thermal stability, and better wetting capacity, enhancing waterproofness of formation rock and increasing adhesion of composition to rock, contains 2.0-10.0 wt.% mixture of water- and oil-soluble surfactants, 0.5-5.0 wt.% oil emulsion of anionic-type polymer, and water, the balance, and can additionally contain hydrocarbon in amounts between 5.0-20.0 wt.%. EFFECT: engaged low-drainable or nondrainaible oil-saturated part of formation due to that composition with increased rheological properties reduces permeability of formations and prevents water inflow in wells thereby increasing oil recovery and reducing water content in produced oil. 2 cl, 4 tbl, 4 ex