FLUID FOR EXPOSING PRODUCTIVE STRATA Russian patent published in 2003 - IPC

Abstract RU 2200180 C2

FIELD: oil and gas production. SUBSTANCE: subject of invention are drilling mud formulations designed for preserving reservoir features of productive strata when exposed and developed. Stratum-exposing fluid contains mudding disperse phase, alkali reagent (0.1-0.3 wt %), and water, said mudding disperse phase containing, wt %: mud powder 3-6, chalk 5-7, and, additionally, carboxymethylcellulose 0.4- 0.8, condensed sulfite-alcohol distillery dregs 0.1-0.5, and acrylic polymer 0.5-0.8. EFFECT: reduced mudding of bottom zone and penetration of filtrate into the latter, and increased stratum permeability restoration factor. 3 tbl

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RU 2 200 180 C2

Authors

Lukmanov R.R.

Lukmanova R.Z.

Akhmetshin R.Z.

Nasifullin D.S.

Zakharov V.V.

Dates

2003-03-10—Published

2000-09-18—Filed