HYDROPHOBIC EMULSION FOR TREATING CARBONATE FORMATION Russian patent published in 2004 - IPC

Abstract RU 2236576 C1

FIELD: oil and gas production.

SUBSTANCE: hydrocarbon liquid-based emulsion comprises 67% of hydrochloric acid aqueous salt solution containing 8-12% HCl + 10-14% CaCl₂, 1-2% of nonionic surfactant, and 0.1-0.3% of corrosion inhibitor, said nonionic surfactant being ethoxylated isononylphenol (OP-10) or oxyethylated isononylphenols. Base hydrocarbon liquid may contain diesel fuel, gas condensate, kerosene, or hexane fraction.

EFFECT: increased permeability of bottom zone of producing carbonate formation, enabled operations intensifying hydrocarbon inflow under winter conditions, and reduced corrosion of equipment during treatment time.

3 cl, 1 dwg

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RU 2 236 576 C1

Authors

Beketov S.B.

Serov A.V.

Kosjak A.Ju.

Dates

2004-09-20—Published

2003-08-25—Filed