沉积相定量识别中的层次分析方法

沉积相定量识别可以提高沉积相分析精度和准确性。由于用于确定沉积相类属的相标志物间具有典型的层次特征,因而可以用层次分析方法来定量确定各相标志物对于沉积相类属的相对重要性定量指标(权重),并结合模糊综合评判法即可定量识别沉积相类属。通过对鄂中坳陷京山剖面二叠系海相碳酸盐岩沉积相定量识别的结果表明,用层次分析方法(结合模糊综合评判法) 进行沉积相定量识别正判率达78%～88%,证明是切实有效的。

HIERARCHIC ANALYSIS METHOD USED IN SEDIMENTARY FACIES QUANTITATIVE RECOGNITION

Hierarchic analysis method used in sedimentary facies quantitative recognition can improve the analytic accuracy and correction of sedimentary facies.The facies markers that are used in determining facies types are characterited by typical hierarchic properties.These properties could be used as important quantitative indexes(weight).Combining with Fuzzy comprehensive evaluation,hierarchic analysis method could be used to recognize facies types.A quantitative recognation example of Permian marine carbonate facies in Jingshan section of Central Hubei Depression suggests that this method is effective and the correct ratio is up to 78%～88%.