测井识别庐枞矿集区科学钻探ZK01孔复杂岩性

Progress in Geophysics(2017)

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Abstract
庐枞矿集区位于长江中下游成矿带内,ZK01孔为深部探测项目在该地区布设的一口科学钻探孔.地球物理测井利用各种仪器在钻孔中连续观测,获取了钻遇地层的视电阻率、极化率、密度、自然伽马、纵波速度和磁化率等物性参数.该孔钻遇岩性复杂,测井曲线难以直接识别岩性,本文基于交会图等技术分析各种岩性测井响应特征,提取各种岩性的物性特征值,建立了砖桥组和岩体组相关岩性的Bayes自动判别模型,其回判正确率分别为85.1%和83%,并在实际判别中取得了较好的应用效果.
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