Recent conventional wells drilled around the Chacahoula Salt Dome field in South Louisiana have been drilled direc-tionally from central pads to preserve wetlands.These wells often encounter borehole instability and lost circulation.Some take multiple sidetracks to reach the target,and others are abandoned before reaching target depth.Two wells were drilled with Casing While Drilling (CWD)technology in mid-2005 to depths similar to those of conventionally drilled offset wells.Both wells successfully reached the target formations.The second well delivered a 25% savings based on the average offset cost.
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机译：最近在南路易斯安那州Chacahoula Salt Dome油田周围钻探的常规井是从中部地区直接钻探的，以保护湿地，这些井经常遇到井眼不稳定和井漏的情况，有些井有多个侧向到达目标，另一些则在被废弃之前就被废弃了。达到目标深度.2005年中，使用随钻随钻（CWD）技术钻探了两口井，井深与常规钻井的偏移井相似，两口井均成功达到了目标地层，第二口井的节油效果达到了25％。平均抵消成本。
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