FIELD: underground well repair, particularly methods to create behind-casing screen in productive reservoir of oil, water and gas wells.
SUBSTANCE: method involves injecting foamed polymeric solution including water-soluble polymer in amount of 1.5-2.5 % by weight, foaming agent in amount of 1-3% by weight, cross-linking foam stabilizing agent in amount of 0.2-0.6% by weight and water in bottomhole formation zone; injecting porous plugging composition including cement grout with 0.3-0.5 water-cement rate taken in amount of 60-80% by weight, above mentioned foamed polymeric solution in amount of 20-40% by weight in bottomhole formation zone. Each of said solutions is characterized by viscosity η and yield point τ change during injection and cross-linkage thereof.
EFFECT: prevention of bottomhole formation zone blocking in slightly cemented reservoirs.
8 cl, 4 tbl, 5 dwg, 1 ex
| Title | Year | Author | Number |
|---|---|---|---|
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|
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|
RU2136879C1 |
