c_Damage and Skin

c_Damage and Skin - Characterizing FormationDamage andSkin...

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1 Characterizing  Formation Damage  and Skin 
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2 Overview 1. Importance to Schlumberger 2. Causes of damage skin 1. Causes of geometric skin 2. Pressure drop due to skin 3. Flow efficiency 4. Skin factor and wellbore radius  5. Convert skin to fracture half-length
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3 Importance to Schlumberger 1. Characterization of formation damage  allows the design Engineer to select the  best stimulation technique.  2. Matrix Stimulation.  Selection of the best matrix treating fluids. Treatment volume optimization using  StimCADE.
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4 Damage Caused by Drilling Fluid Mud filtrate invasion
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5 Damage Caused by Production p < p b p > p b
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6 Damage Caused by Injection “dirty” water incompatible water
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7 Reservoir Model of Skin Effect Bulk formation h r w k s r s k Damaged zone
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8 Reservoir Pressure Profile 500 1000 1500 2000 1 10 100 1000 10000 Distance from center of wellbore, ft Pressure, psi p s Radial flow with 0 skin Radial flow with damage skin
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Skin and Pressure Drop s p qB h k 00708 . 0 s
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This note was uploaded on 04/05/2011 for the course PETE 689 taught by Professor Staff during the Spring '08 term at Texas A&M.

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c_Damage and Skin - Characterizing FormationDamage andSkin...

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