中国地质2025，Vol.52Issue(2)：680-690,11.DOI:10.12029/gc20210407003
基于多源数据统计分析的页岩脆性定量评价方法
Quantitative evaluation of shale brittleness based on statistics:Taking shale of Niutitang Formation in Western Hubei as an example
摘要
Abstract
This paper is the result of geological survey engineering. [Objective]The brittleness of shale reservoir is one of the parameters reflecting the fracturing quality of shale gas reservoir,which has an important influence on the degree of difficulty of fracturing and the shape of fracture network.[Methods]In order to accurately evaluate the brittleness characteristics of Niutitang Formation shale reservoir in Western Hubei,systematic sampling,whole rock mineral and clay content test,main and trace element content test,acoustic mechanics joint test and other analytical tests were carried out on five wells in the south wing of Huangling anticline in Western Hubei.The quantitative evaluation of shale brittleness was carried out by cluster analysis and principal component analysis.[Results]There is a close relationship between minerals and rock brittleness,and the cluster analysis method can quantitatively characterize the effective brittle mineral composition and non-effective brittle mineral composition in shale;The comprehensive quantitative evaluation formula of brittleness index based on rock mechanics,mineral composition and element composition is established by using principal component analysis method,which overcomes the limitation of single method and forms the brittleness index profile of Niutitang Formation shale section in Western Hubei.[Conclusions]The results of microseismic monitoring and fracturing show that the newly established brittle index profile can accurately indicate the high brittle layer of shale,and the fracturing effect is good.关键词
页岩气/页岩脆性/矿物组分/力学参数/元素/统计分析/牛蹄塘组/地质调查工程/鄂西Key words
shale gas/shale brittleness/mineral composition/mechanical parameters/elements/statistical analysis/Niutitang Formation/geological survey engineering/Western Hubei分类
能源科技引用本文复制引用
李娟,王胜建,田玉昆,周惠,刘策,薛宗安..基于多源数据统计分析的页岩脆性定量评价方法[J].中国地质,2025,52(2):680-690,11.基金项目
国家科技重大专项(2016ZX05034)和国家重点研发计划(2016YFC060110305)联合资助. Supported by the projects of National Science and Technology Major Project(No.2016ZX05034)and National Key Research and Development Program of China(No.2016YFC060110305). （2016ZX05034）
