地质科技情报2017，Vol.36Issue(2)：133-140,8.DOI:10.19509/j.cnki.dzkq.2017.0217
Q型聚类分析在四川盆地南部上三叠统须二段成岩相研究中的应用
Application of Q Type Cluster Analysis in the Study of Quantitative Diagenetic Facies of Member 2 of Xujiahe Formation in Southern Sichuan
摘要
Abstract
Member 2 of the Upper Triassic Xujiahe Formation in southern Sichuan Basin is one of the key layers for gas exploration.By identifying the thin sections,analyzing the drill core physical properties,we find that main types of reservoir sandstones are feldspar lithic sandstone,lithic feldspar sandstone and lithic sandstone,and reservoir sandstones has experienced compaction,cementation,dissolution,disruption and metasomatism.By calculating the reservoir rock compaction coefficient,cementation coefficient and coefficient of dissolution,we use the Q type cluster analysis to classify reservoir rock according to the similar variable factors,diagenetic facies of the 2nd Member of Xujiahe Formation.The facies are divided into strong compaction-strong cementation facies,strong compaction-medium cementation facies,strong compaction-weak cementation facies,medium compaction-weak cementation facies,weak compaction-weak cementation facies in five kinds of diagenetic facies quantitatively.The study result shows that the diagenetic facies distribution is obviously controlled by interstitial material,the plastic debris and the distribution of sedimentary facies,which mainly developed in the underwater distributary channel of the delta front.关键词
四川盆地南部/须家河组/成岩相/Q型聚类分析Key words
southern Sichuan/Xujiahe Formation/diagenetic facies/Q type cluster analysis分类
地质学引用本文复制引用
余瑜,林良彪,高健,洪薇..Q型聚类分析在四川盆地南部上三叠统须二段成岩相研究中的应用[J].地质科技情报,2017,36(2):133-140,8.基金项目
国家科技重大专项(2011ZX05002-004-006HZ （）
2016ZX05002-004-010) （）
