FIELD: oil and gas production.
SUBSTANCE: invention relates to emulsion compositions increasing oil recovery of wells. In particular, leveling of injectivity profile of injection wells and selective water shutoff in production wells is accomplished by using stable emulsion containing emulsifier Naftenol NZ (0.05-0.35%), crude oil and 1.4-1.5% sodium chloride aqueous solution at 1:1 weight ratio (balancing amount) further contains 0.95-1.0% bentonite and 0.45-0.5% polyacrylamide.
EFFECT: improved viscosity and elastic properties of emulsion at the same heat resistance.
2 dwg, 1 tbl, 4 ex
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