Optimized drilling fluids benefit tough Andean wells

Aluminum complex drilling fluids solved common drilling problems in Colombia, Ecuador, Peru, Bolivia, and Venezuela.Drilling wells in the Andes Mountains of South America face significant difficulties. Wells located in the foothills along the Andean basin are particularly hard to drill because of tectonic stresses and unstable, microfractured shales.Operators have experienced difficulties drilling wells using both water-based and oil-based muds (OBM). Environmental regulations hinder the use of OBM due to the potential environmental impact and costs associated with waste disposal. In many cases, OBMs have not prevented wellbore instability.This article explains how wellbore problems can a...

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