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- Title
Mineral Composition and Brittleness Analysis of Organic-Rich Lower Paleozoic Shale in South Sichuan and North Yunnan Areas of China.
- Authors
Dan, Lin; Tingshan, Zhang; Jijia, Liao; Mingguang, Liao; Dan, Geng; Xiaocong, Ren; Yuliang, Chen
- Abstract
Organic-rich Lower Paleozoic Qiongzhusi, Wufneg, and Longmaxi formations in South Sichuan and North Yunnan areas are the main gas prospecting strata in China. XRD analysis is used to determine the mineral composition and brittleness indexes of three shale suites in these areas. These parameters are important for evaluating shale gas resources, analyzing reservoir-forming mechanisms, and planning prospecting. The investigation results indicate that the three shale suites have a mean quartz content of more than 27% and a mean clay mineral content of less than 37.27%. Their sedimentary environment is euxinic. They passed through a telodiagenetic phase. The mean relative brittleness index of the samples from Qiongzhusi, Wufneg, and Longmaxi formations are 69.54, 67.33, and 60.44%, respectively. Such high relative brittleness indexes imply that the studied shale suites have good fracturability.
- Subjects
SHALE gas; BRITTLENESS; MINERALS; QUARTZ; PALEOZOIC Era
- Publication
Chemistry & Technology of Fuels & Oils, 2016, Vol 52, Issue 2, p218
- ISSN
0009-3092
- Publication type
Article
- DOI
10.1007/s10553-016-0693-2