基于灰色关联的复杂碳酸盐岩测井岩相识别

岩石结构及成分的解释是碳酸盐岩沉积储层研究的基础,基于各种数学方法的测井岩相识别是非取心井沉积微相解释的关键.由于复杂碳酸盐岩的测井多解性,其岩相的测井识别一直是个难题.以四川盆地中部磨溪气田嘉二段测井岩相解释为例,介绍了灰色关联分析方法在复杂碳酸盐岩测井岩相识别中的应用,灰色关联较之其他数学方法具有模型简单、计算快速等优点,经与取心井对比分析,其岩性识别的准确程度较高,获得了很好的实际应用效果.

Log lithofacies identification for complex carbonate rock based on grey correlation method

Interpretation of rock structure and composition is the basis of carbonate rock sedimentary reservoi, well log lithofacies identification based on various mathematic methods is a key factor of sedimentary microfacies interpretation for non - coring well. Log lithofacies identification is difficult problem all the time due to log ambiguity of complex carbonate rock, taking as an example for log lithofacies interpretation in Jia II member of Moxi gas field in the central of Sichuan Basin. This paper introduces grey correlation method applied in log lithofacies identification of complex carbonate rock. Grey correlation has advantages of simple model, fast calculation compared to other mathematic methods. Furthermore, comparison with coring well shows its higher accuracy.