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Unformatted text preview: Acceptable Fracture Gradient= 0.2 ppg
= 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
= 0.3 ppg
Minimum Fracture Gradient At Casing Point
= 18.2 ppg
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This document was uploaded on 03/28/2014.
- Fall '14