DRILLING FLUID TREATMENT REAGENT Russian patent published in 2005 - IPC

Abstract RU 2261889 C1

FIELD: oil and gas production.

SUBSTANCE: water-based reagent contains, wt %: polyacrylonitrile fiber 8.0-12.0, alkali 6.0-8.0, polyglycol (as glycolic component) 7.0-10.0, and, additionally, sulfuric or hydrochloric acid 1.0-2.0 and hydrolyzed colophony 5.0-7.0. Reagent is added to drilling fluid in amount 1-2 wt %.

EFFECT: improved quality of producing formation exposing during well completion period involving washing with reagent-treated drilling fluid due to increased coefficient of restoration of initial permeability of reservoir and inversion of wettability of porous structure thereof.

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RU 2 261 889 C1

Authors

Azarchenkov A.I.

Azarchenkova R.D.

Dates

2005-10-10—Published

2004-10-26—Filed