METHOD OF WATER SHUT-OFF IN POROUS-FRACTURED OIL RESERVOIRS

摘要

methods of water shut-off in porous-fractured oil reservoirs. SUBSTANCE: method is realized by injection of selective waterproofing polymer composition with subsequent additional injection of polymer with initial size of particles smaller than transverse sizes of fractures. Polymer is used in form of water-swelling polymer- hydroxyethylcellulose. EFFECT: higher efficiency of method of water shutoff due to provision of continuous screen in water-bearing part of formation with preserved permeability of oil interval of formation. 1 dwg, 1 tbl, 1ex