FIELD: oil and gas industry.
SUBSTANCE: invention refers to oil extraction and can be employed for raising oil yield from carbonate and terrygenous water-flooded non-uniform formations under conditions of critical watering at late stages of oil deposits development. Oil displacing reagent for non-uniform watered formations includes water, polyacrylamide and additionally metal-indicator, grafted to polyacrylamide, at a following ratio of components, wt %: polyacrylamide 0.5-2.0, metal-indicator 0.0005-0.05, water - the rest. Also as metal indicator a reagent contains polyvalent metals - nickel or cobalt, or vanadium or aluminium or chromium.
EFFECT: increased efficiency of well development.
2 cl, 8 ex, 9 tbl
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| METHOD FOR APPLICATION OF BIOPOLYMER COMPOSITES REINFORCED WITH CARBON NANOTUBES TO INCREASE OIL RECOVERY OF FORMATIONS | 2021 |
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RU2793821C1 |
