Paleoenvironment in an Ordovician carbonate reservoir in southwestern of Tarim Basin,NW China: Evidence from stable isotopes |
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| Authors: | Jun Niu Wenhui Huang Liang Fei |
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| Affiliation: | 1. Faculty of Petroleum, China University of Petroleum-Beijing, Karamay, Xinjiang, China;2. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum (Beijing), Beijing, China;3. School of Energy Resource, China University of Geosciences, Beijing, China |
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| Abstract: | The widely distributed carbonate reservoirs of lower to middle Ordovician are the most important petroleum reservoir in Tarim Basin. Based on the geological setting and lithology, the analysis of paleoenvironment was performed. The results show that carbon isotope composition and evolution are consistent with the variations of sedimentary environments. Low δ13C(?2.6‰ to ?1.7‰) values in the upper part of Yingshan Formation correspond to restrict platform with a low value of δCe. Higher δ13C values (?1.5‰ to 0.8‰) from the Penglaiba Formation to lower Yingshan Formation and Lianglitage Formation correspond to open platform . |
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| Keywords: | Carbon isotope oxygen isotope sedimentary environment Yubei area Tarim Basin |
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