1 the calculation for gain size utilizes an equation

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Unformatted text preview: teria) ppg = Minimum Mud Weight At Total Depth +Surge Considerations Minimum Fracture Gradient At Casing Point +Safety Factor Acceptable Fracture Gradient At Casing Point ppg = ppg = = = = ppg ppg ppg ppg The calculation for kick size utilizes the depth ratio equation: EMWCaingDepth ( size) = MW + KickDepth ( KickSize) Ca sin gDepth (Eq.1) The calculation for gain size utilizes an equation that assumes influx gradient: EMWCaingDepth (Gain) = 19775.95(GainVolume)[( MW )(0.052) − 0.12] ( DHole − DDC 2 )(Ca sin gDepth) 2 ( KickSize) (Eq.2) The total equivalent mud weight at the tentative casing point for design size kick and gain is the sum of the 2 components: ΣEMW (Eq.3) Casing Depth=EMW Casing Depth(Size)+EMW Casing Depth(Gain) Copyright(c) 2005 by Ali Ghalambor & Boyun Guo 121 Determination of Casing String Type Identification of the type of casing string the setting depth was determined. If the setting depth is 6500 ft or less and if the casing point is in normal or subnormal formation pressures, then the only mechanically dictated casing for the prospect is...
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