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A detection system based on three-electrode array for connecting a relief well to failure well
Author(s): 
Pages: 1181-1188
Year: Issue:  6
Journal: Acta Petrolei Sinica

Keyword:  relief wellfailure welldetection systemthree-electrode arrayalternating magnetic field;
Abstract: 通过调研救援井与事故井连通探测系统工作原理,分析了三电极系注入地层的低频交变电流在地层及事故井套管中的传播与衰减规律,建立了事故井套管上聚集电流产生的交变磁场空间分布模型,得到了救援井与事故井间距和相对方位的计算方法.通过数值模拟与试验验证,将三电极系应用于救援井与事故井连通探测系统,提高了系统测距范围和探测精度;通过对比基于单电极救援井与事故井连通探测系统,基于三电极系的探测系统对探管灵敏度的要求更低,更有利于在实际工况中的应用,为中国自主研发救援井与事故井连通导向工具提供理论支持.
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