Lithofacies classification of fine-grained sedimentary rocks in the early Cambrian Qiongzhusi formation of Huize area, Eastern Yunnan Province

2019 5th International Conference on Energy Materials and Environment Engineering

能源学;生态环境科学

Cheng, Yong^1^2 ; Wen, Yiming^2 ; Xia, Jianbo^2 ; Liu, Cong^2 ; Chang, Lantian^3

Faculty of Land and Resource Engineering, Kunming University of Science and Technology, Kunming, Yunnan

650093, China^1

Mining Engineering Faculty, Kunming Metallurgy College, Kunming, Yunnan

650033, China^2

Wuyang Mine, Lu'An Environmental Energy Dev. Co Ltd., Changzhi, Shanxi

046205, China^3

关键词: Early cambrians;    Formation evaluation;    Gas development;    Hydrocarbon source rocks;    Lithofacies classifications;    Mineral composition;    Oil reservoirs;    Sedimentary environment;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/295/4/042124/pdf
DOI  :  10.1088/1755-1315/295/4/042124

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

In recent years, the shale gas development boom around the world has made finegrained sedimentary rocks become the focus and hotspot of sedimentological research. Lithofacies are rock types and assemblages formed in a certain sedimentary environment, and are important parameters in formation evaluation. The lithofacies classification of fine-grained sedimentary rocks is an important basis for the study of hydrocarbon source rocks, shale oil and gas and tight oil reservoirs. Anchored in the previous studies, the lithofacies classification scheme of fine grained sedimentary rocks in study area based on mineral composition was established in this paper. The results prove that the main lithofacies of Qiongzhusi formation in study area are mainly felsic clay rocks and clayey felsic fine-grained sedimentary rocks, and a small number of which are dolostone, limestone, felsic fine-grained sedimentary rocks, dolomitic felsic fine-grained sedimentary rocks, clayey felsic fine-grained sedimentary rocks, felsic dolostone, and dolomitic mixed fine-grained sedimentary rocks. This study can provide some geological basis for the evaluation and regional election of shale gas in this area.