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MPD improves drilling rates in Canadian field
06/04/2007
Shell Canada drilled a well using managed pressure drilling (MPD) and an unweighted fluid system to improve drilling rate of penetration in the Bullmoose area, northeastern British Columbia.Operators working in this area identified the Nikanassin as a very hard, slow drilling formation, which increases drilling time and costs. The Nikanassin is hard and abrasive and ranges from 1,000 m to 1,800 m thick. Elevated mud weights are sometimes required to deal with high-pressure nuisance gas or water flows, which further impedes drilling performance.Various mud systems and bits were used in offset wells, resulting in average rates of penetration of 1.4-2.4 m/hr. Implementing an MPD program allo...
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