METHOD OF DEVELOPMENT OF OIL FORMATIONS NONUNIFORM IN PERMEABILITY Russian patent published in 2003 - IPC

FIELD: oil producing industry. SUBSTANCE: method includes injection into producing formation of fringes of water, suspension of water-soluble polymer and suspension of dispersed filler in carrying fluid in form of inert fluid not inducing swelling of dispersed filler and water-soluble polymer, raw oil, oil distillates, oil processing products, organic solvents. Injections of suspension of water-soluble polymer and suspension of dispersed filler are carried out in combination or separately. Content of dispersed filler in suspension is selected within 4-10 wt.%. Dispersed filler is used mainly in form of highly dispersed kaolin or wood flour. EFFECT: higher efficiency of development of oil formations nonuniform in permeability due to prevention or elimination water breaking through high permeability intervals and fractures, and engagement in development of dead and slighly drained zones of formation. 2 cl, 2 ex