| Author's Name: Lü Yannan, Zhang Jinchuan, Zhang Peng, Huang Yuqi, Yu Feifei, Deng Ende |
| Institution: China University of Geology (Beijing) |
| Abstract: |
| The Lower Cambrian Niutitang shale is wide and stably distributed in northwestern Guizhou. It consists of deep-water shelf carbonaceous shale and shallow-water shelf silty shale with large sedimentary thickness (＞39m), in which the black carbonaceous shale at the bottom of Niutitang Formation is organic-rich. Organic geochemical analysis shows that it is characterized by predominant Type-Ⅰ kerogen, high TOC values(TOC >5% in the organic-rich black shale) and high mature to overmature organic matter in thermal evolution. Microfractures and micropores are developed in the shale reservoirs, which are of relatively high porosity(mean 5.14%) and permeability (mean 0.0114×10-3μm2 ) . The high content of gas(1.3m3/t in average) means a good potential of shale gas resources. It is predicted that Jinsha-Xifeng and Renhuai areas are potential for shale gas prospecting. |
| Keywords: Niutitang Fm.; Shale gas; Preservation condition; Gas Accumulation condition; Northwestern Guizhou |
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投稿时间：
2014-06-08 |
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