地质科技通报2024，Vol.43Issue(2)：1-15,15.DOI:10.19509/j.cnki.dzkq.tb20220446
陆相页岩岩相非均质性及储层孔隙发育特征:以四川盆地自流井组东岳庙段页岩为例
Lithofacies heterogeneity and reservoir pore development characteristics of continental shale:A case study of the Dongyuemiao shale of the Ziliujing Formation in the Sichuan Basin
摘要
Abstract
[Objective]After the exploration break through of the Well Fuye 10 in the Fuxing area of the Sichuan Basin,shale oil and gas from the Dongyuemiao section of the Jurassic Ziliujing Formation showed good exploration potential.The Dongyuemiao shale is characterized by unique shell limestone interlayers,high clay mineral content(up to 60％),various reservoir pore types,and strong vertical heterogeneity.[Methods]Taking the Well Xingye X as an example,combined with logging data,core observation,argon ion polishing scanning electron microscopy(SPE),and other technical means,the lithofacies characteristics and pore development characteristics of continen-tal shale in the Dongyuemiao section were emphatically analysed.[Results]In this study,the principle of conti-nental shale lithofacies division of"interlayer+mineral three-terminalelements"was established,and the continental shale of the Dongyuemiao section was vertically divided into 6 lithofacies:shell rhythmic mixed shale facies,silt shell interbedded clay shale facies,silt lithic interbedded mixed shale facies,lithic limestone facies,lithic inter-bedded mixed shale facies,and lithic interbedded clay shale facies.Through argon ion polishing and scanning elec-tron microscopy(SEM),it was found that this set of continental shale mainly develops special complex organic clay pores,of which the lithic interbedded clay shale facies was the most developed type of organic pore,while the lithic limestone facies organic pores were not developed,mainly develop intragranular dissolved pores.The mercury intru-sion nitrogen adsorption joint measurement results revealed that there was no significant difference in the pore size distribution of the six lithofacies shales.[Conclusion]Comprehensive analysis revealed that the interaction be-tween organic matter and clay minerals during the diagenetic evolution process was the main factor influencing the pore development of continental shale in the Dongyuemiao section.关键词
陆相页岩/岩相非均质性/有机黏土复合体孔/侏罗系/东岳庙段/四川盆地Key words
continental shale/lithofacies heterogeneity/organic-clay complex pore/Jurassic/Dongyuemiao section/Sichuan Basin分类
天文与地球科学引用本文复制引用
舒志国,舒逸,陈绵琨,彭伟,刘皓天,肖雄..陆相页岩岩相非均质性及储层孔隙发育特征:以四川盆地自流井组东岳庙段页岩为例[J].地质科技通报,2024,43(2):1-15,15.基金项目
中国石油化工股份有限公司"十条龙"科研项目"复兴侏罗系陆相页岩油气藏地质评价技术"(P21078-2) （P21078-2）
中国石油化工股份有限公司科研项目(P23077) （P23077）
