COMPOSITION FOR SECONDARILY OPENING PRODUCTIVE OIL BED Russian patent published in 1999 - IPC

Abstract RU 2133258 C1

FIELD: oil and gas production. SUBSTANCE: composition designed for use when drilling and rebuilding oil and gas wells as perforation fluid contains, wt. %: polyacrylamide, 0.0003-0.0015; nonionic surfactant, 0.003-0.01; peroxide compound-based reagent, 0.1-0.5; and potassium and/or sodium salt-mineralized water, the balance. As a result, composition is conferred on property to completely restore permeability of bottom zone of productive oil bed mudded with polymer-containing drilling fluid in the course of drilling and simultaneously to prevent formation of water-oil emulsion on appearance of bed fluids in hole and to break water-oil emulsion escaping bed. EFFECT: improved performance characteristics. 3 tbl

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RU 2 133 258 C1

Authors

Tataurov V.G.

Natsepinskaja A.M.

Grebneva F.N.

Dates

1999-07-20—Published

1997-06-06—Filed