Intermediate casing a full string of casing set form

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Unformatted text preview: Acceptable Fracture Gradient= 0.2 ppg Gain Margin = 0.2 ppg Design Size Kick = 0.5 ppg Allowable ΔP (Normal or Subnormal Pressures)= 2400 psi Allowable ΔP (Abnormally High Pressures) = 3100 psi 253 Design Definitions: Surface Casing: A full sting of casing set from the surface into normal or subnormal formation pressure. To depth of 6500 ft or less. Intermediate casing: A full string of casing set form the surface to a depth greater than 65oo ft. or set into abnormally high formation pressures. Driller Liner: A partial string of casing, hung off inside a previously set casing string, and set to a depth greater than 6500 ft. or set into abnormally high formation pressures. 254 Copyright(c) 2005 by Ali Ghalambor & Boyun Guo 127 Maximum Anticipated Formation Pressure To Total Depth=17.6ppg +Swab Considerations (Design Criteria) = 0.3 ppg Minimum Mud Weight At Total Depth = 17.9ppg +Surge Considerations = 0.3 ppg Minimum Fracture Gradient At Casing Point = 18.2 ppg +Safety Factor = 0...
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This document was uploaded on 03/28/2014.

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