FORMULATION FOR ACID TREATMENT OF CRITICAL BOREHOLE ZONE Russian patent published in 2007 - IPC C09K8/72 C09K8/528 

Abstract RU 2294353 C1

FIELD: oil and gas production.

SUBSTANCE: invention relates to formulations serving to intensify functioning of injection and producing wells and can also be utilized for controlling development of oil deposits, for completing as drilled and repaired wells, for cleaning hole from salt deposits, and for cleaning tubing. Formulation according to invention contains surfactant, in particular water-, oil-, and water-and-oil-soluble surfactant or surfactant mixture, 0.5-10.0%; polymer, in particular anionic polymer emulsion in oil, 0.01-5.0%; finely dispersed hydrophobic material, 0.1-2.5%; salt-deposition and corrosion inhibitor, 0.1-1.5%; and mineral acid or mineral acid mixture, or mineral acid/organic acid mixture, in balancing amount. Formulation may further 5.0 to 20.0% of hydrocarbon.

EFFECT: improved performance characteristics due to improved rheological properties and heat resistance and enhanced oil-driving properties.

3 cl, 3 tbl, 4 ex

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RU 2 294 353 C1

Authors

Volkov Vladimir Anatol'Evich

Belikova Valentina Georgievna

Turapin Aleksej Nikolaevich

Dates

2007-02-27Published

2005-06-14Filed