Try a shallower depth and recalculate until the

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Unformatted text preview: must be deeper to provide more fracture gradient. Assume a deeper depth and continue to iterate until the strength is sufficient of sustain the load. 250 Copyright(c) 2005 by Ali Ghalambor & Boyun Guo 125 If the ΣEMW is less than the fracture gradient the assumed setting depth is either OK or too deep depending on the magnitude of the difference. Try a shallower depth and recalculate until the difference is acceptable. Establishing the setting depth to the nearest even 100 foot value is sufficient. At this point a mechanically sound casing point program will be established. The projected formation pressure versus depth projection can be wrong so that up to a design size kick and gain can be encountered and handled without loss of integrity at the casing shoes(Fig.3). 251 Fig.3 Copyright(c) 2005 by Ali Ghalambor & Boyun Guo 126 Example 1(Surface, Intermediate and Drilling Liner) Design Criteria: Swab Considerations (Trips margin) = 0.3 ppg Surg Considerations = 0.3 ppg Safety Factor For...
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This document was uploaded on 03/28/2014.

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