Understanding Shale Heterogeneity - Key to Minimizing Drilling Problems in Horn River Basin
Safdar Khan, Sajjad Ansari, Hongue Han, Nader Khosravi
Abstract More than 70% of nonproductive time (NPT) and increases in drilling cost are related to wellbore instabilities. Shale formations are the primary sources (90%) for wellbore instabilities. Numerous wellbore instability problems have been reported in the Horn River basin (HRB), the …
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