All Days 2016
DOI: 10.2118/182816-ms
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Innovative Step Change in Drilling Efficiency for Medium Radius Re-Entry Deep Gas Wells with a High Build Rate Rotary Steerable System

Abstract: Generally, deep gas workover/re-entry wells in Saudi Arabia are kicked off in the Sudair formation through a whipstock because the overlying base Jilh dolomite can flow with high pressure, which jeopardizes well control. Whipstocks are set deep in the 9 5/8-in. casing, after which the 8 3/8-in. and 5 7/8-in. holes are drilled to access the target Lower Carbonate and Sand reservoirs. Deeper kickoffs also avoid contact across the water-bearing Carbonate A, aiming for displacement across Carbonate B or C reservoi… Show more

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