COMPOSITION FOR PRODUCTION AND TRANSPORT OF CRUDE OIL AND A METHOD FOR PREPARATION THEREOF Russian patent published in 2004 - IPC

FIELD: oil and gas production. SUBSTANCE: invention, in particular, relates to composition for production and transport of crude oil as well as for compositions for removal of asphaltene/tar/paraffin deposits on oil-field equipment, in bottom zones of oil wells, and in oil pipelines. Composition for production and transport of crude oil contains 98.0-99.9% of multicomponent mixture of synthetic anionic and nonionic surfactant, oxyethylated phosphoric acid alkyl esters, hydrocarbon solvent, aliphatic alcohol or aromatic alcohol, or products containing them, or 0.1- 2.0% modified disperse silica (Polisil). Stabilization composition contains water-soluble polymer and is prepared by adding disperse silica or its mixture with water-soluble polymer aqueous solution to multicomponent mixture. EFFECT: increased permeability of injection wells, emulsification, dispersing, and stabilization of solid impurity particles, and achieved displacement of oil from low-dispersing intervals and clogging of water-bearing canals in production wells. 3 cl, 6 tbl, 2 ex