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| Keywords | |
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Qaidam Basin |
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Lenghu area |
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crude oil correlation |
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biomarker |
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maturity |
| Authors | |
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XU Wen-1 |
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2 |
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BAO Jian-Ping-2 |
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ZHU Jian-Feng-1 |
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TIE Hui-Juan-1 |
| PubMed | |
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Article by Xu, W. 1 |
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Article by 2 |
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Article by Bao, J. P. 2 |
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Article by Zhu, J. F. 1 |
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Article by Tie, H. J. 1 |
Correlation of crude oil from Lenghu area in northern Qaidam Basin
XU Wen-1, 2, BAO Jian-Ping-2, ZHU Jian-Feng-1, TIE Hui-Juan-1
1. Northeast Oil and Gas Branch��SinoPEC��Changchun 130062��China; 2. Key Laboratory of Oil �� Gas Resource and Exploration Technology��Ministry of Education��Yangtze University�� Jingzhou 434023��Hubei��China
By the help of GC-MS method��the composition of biomarkers in 22 crude oil samples from Lenghu 3��4 and 5 structures of Lenghu area in northern Qaidam Basin have been analyzed�� Based on the difference of the relative contents of terpanes and steranes��the crude oils can be divided into three groups��including low-mature single-source��mature mix-source and high-mature mix-source types�� Comparative study showed that the alkane presented as low molecule hydrocarbon less than nC20was predominant in the crude oils from Lenghu 3 and 4 structures�� while high molecule hydrocarbon more than nC21 was predominant in the crude oils from Lenghu 5 structure�� In the crude oil from Lenghu 3 to Lenghu 5��the relative content of tetracyclic terpane was decreased��but the relative contents of rearranged hopane and rearranged sterane were increased gradually��which indicates that their organic material types were degraded��but their maturity was raised successively��