METHOD OF WATER SHUT-OFF IN POROUS-FRACTURED OIL RESERVOIRS Russian patent published in 2002 - IPC

Abstract RU 2187620 C2

FIELD: 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

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RU 2 187 620 C2

Authors

Zakirov A.F.

Khaliullin F.F.

Sidorov L.S.

Valeeva G.Kh.

Takhautdinov R.Sh.

Dates

2002-08-20—Published

2000-08-14—Filed