Mineral Composition and Brittleness Analysis of Organic-Rich Lower Paleozoic Shale in South Sichuan and North Yunnan Areas of China
- Authors: Dan L.1,2,3, Tingshan Z.1,2,3, Jijia L.1,2,3, Mingguang L.1,2,3, Dan G.4, Xiaocong R.5, Yuliang C.6
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Affiliations:
- State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University
- Natural Gas Geology Key Laboratory of Sichuan Province, Southwest Petroleum University
- School of Geosciences and Technology, Southwest Petroleum University
- PetroChina Huabei Oilfield Company
- Downhole service sub-company, PetrochinaDaqing oil field
- No. 280 Research Institute of Nuclear Industry
- Issue: Vol 52, No 2 (2016)
- Pages: 218-223
- Section: Article
- URL: https://journals.rcsi.science/0009-3092/article/view/234477
- DOI: https://doi.org/10.1007/s10553-016-0693-2
- ID: 234477
Cite item
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.
About the authors
Lin Dan
State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University; Natural Gas Geology Key Laboratory of Sichuan Province, Southwest Petroleum University; School of Geosciences and Technology, Southwest Petroleum University
Author for correspondence.
Email: zts_3@126.com
China, Chengdu; Chengdu; Chengdu
Zhang Tingshan
State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University; Natural Gas Geology Key Laboratory of Sichuan Province, Southwest Petroleum University; School of Geosciences and Technology, Southwest Petroleum University
Email: zts_3@126.com
China, Chengdu; Chengdu; Chengdu
Liao Jijia
State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University; Natural Gas Geology Key Laboratory of Sichuan Province, Southwest Petroleum University; School of Geosciences and Technology, Southwest Petroleum University
Email: zts_3@126.com
China, Chengdu; Chengdu; Chengdu
Liao Mingguang
State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University; Natural Gas Geology Key Laboratory of Sichuan Province, Southwest Petroleum University; School of Geosciences and Technology, Southwest Petroleum University
Email: zts_3@126.com
China, Chengdu; Chengdu; Chengdu
Geng Dan
PetroChina Huabei Oilfield Company
Email: zts_3@126.com
China, Hebei Renqiu
Ren Xiaocong
Downhole service sub-company, PetrochinaDaqing oil field
Email: zts_3@126.com
China, Daqing Helongjiang
Chen Yuliang
No. 280 Research Institute of Nuclear Industry
Email: zts_3@126.com
China, Deyang Guanghan