LI Jing-gui, ZHENG Jian-jing, LIU Wen-hui, CHEN Guo-jun, MENG Zi-fang. Dibenzothiophene Series from the Carbonate Rocks and Their Crude Oils in Tabei and Tazhong Areas,Tarim basin[J]. Acta Sedimentologica Sinica, 2004, 22(2): 348-353.
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LI Jing-gui, ZHENG Jian-jing, LIU Wen-hui, CHEN Guo-jun, MENG Zi-fang. Dibenzothiophene Series from the Carbonate Rocks and Their Crude Oils in Tabei and Tazhong Areas,Tarim basin[J]. Acta Sedimentologica Sinica, 2004, 22(2): 348-353.
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Dibenzothiophene Series from the Carbonate Rocks and Their Crude Oils in Tabei and Tazhong Areas,Tarim basin
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Key Laboratory of Gas Geochemistry, Lanzhou Institute of Geology, Chinese Academy of Sciences, Lanzhou 730000
- Received Date: 2003-04-25
- Rev Recd Date:
2003-10-23
- Publish Date:
2004-06-10
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Abstract
According to characteristics of compositions and abundances, the dibenzothiophene series of Cambrian and Ordovician carbonate source rocks(marls, muddy limestone and dolomites) from four wells (KN1, LN46, TZ12 and TaCl) in Tabei and Tazhong areas, Tarim basin can be divided into three different types. They are:Ⅰ dibenzothiophene, methyldibenzoth iophene type; Ⅱ dibenzothiophene, methyldibenzothiophene, dimethyldi benzothiophene+trimethylfluorene mixture type; and Ⅲ dibenzothioph ene, methyldibenzothiophene, dimethyldibenzothiophene and trimethyl dibenzothiophene type. The distribution patterns of dibenzothiophene series of eleven marine crude oil samples from Tabei and Tazhong uplifts are, without exception, dibenzothiophene, methyldibenzothiophene, dimethyldibenzothiophene and trimethyldibenzothiophene types, which are very identical to Ⅲ types of above Cambrian and Ordovician marine carbonate source rock samples. Hence, it is inferred that the eight marine crude oil samples from Tabei uplift are thought mainly to possibly derive from Lower Ordovician marine source rocks of Tabei Lunnan area, the three marine crude oil samples from Tazhong uplift possibly from Middle-Upper Ordovician marine source rocks of Tahzhong area.
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