Invention Application
US20150152316A1 WATER BASED COMPLETION AND DISPLACEMENT FLUID AND METHOD OF USE 审中-公开
基于水的完成和位移流体及其使用方法

WATER BASED COMPLETION AND DISPLACEMENT FLUID AND METHOD OF USE
Abstract:
A method of cleaning a wellbore prior to the production of oil or gas is disclosed, wherein the wellbore has been drilled with an invert emulsion drilling mud that forms an invert emulsion filter cake. The method may include the steps of circulating a breaker fluid into the wellbore, where the breaker fluid includes an aqueous fluid, a water soluble polar organic solvent, a hydrolysable ester of a carboxylic acid, and a weighting age, and where the hydrolysable ester is selected so that upon hydrolysis an organic acid is released and the invert emulsion of the filter cake breaks.
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