| Reservoir Geochemistry of the Kuche Petroleum System in the Tarim Basin, China |
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| 作者姓名： | 张敏 赵红静 |
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| 作者单位： | DepartmentofGeochemistry,YangtzeUniversity,Jingzhou434023,China |
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| 基金项目： | ThisresearchprojectwasfinanciallysupportedjointlybytheState 95’ScientificandTechnologicalProgram (GrantNo .96 1 1 1 0 1 0 3 0 6 )andtheYouthFoundationofChinaNationalPetroleumCorporation (GrantNo.J98 0 5 ) . |
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| 摘 要： | The geochemical characteristics of crude oils and reservoir core extracts from the Kuche petroleum system are described and studied systematically by means of various geochemical techniques and methods to acquire molecular information. The results suggest crude oils from the petroleum system can be divided into two groups: marine oils and non-marine oils. The former represents the dominant oils found in the area. Tar mats were firstly discovered and determined accurately in terrestrial oil and gas reservoirs, with Lower Tertiary sandstone reservoirs in the Yaha oilfield of the Tarim Basin. However, based on the ratio of 20S/(20S 20R)C29 sterane as a maturity parameter, lacustrine oils filled into the Tertiary reservoirs in the direction toward the western part of the petroleum system. In contrast, according to the fact that methylcyclohexane indices of eastern oils are greater than those of western oils, the location in which coalgenerated oils filled into the Tertiary reservoirs lies in the eastern part of the petroleum system.
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| 关 键 词： | 地球化学特征 蓄水池 塔里木盆地 油田 |
Reservoir geochemistry of the Kuche petroleum system in the Tarim Basin,China |
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| Zhang?Min,Zhao?Hongjing.Reservoir Geochemistry of the Kuche Petroleum System in the Tarim Basin, China[J].Chinese Journal of Geochemistry,2004,23(2):163-168. |
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| Authors: | Zhang Min Zhao Hongjing |
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| Institution: | (1) Department of Geochemistry, Yangtze University, 434023 Jingzhou, China;(2) Key Laboratory of Exploration Technologies for Oil and Gas Resources, Yangtze University, Ministry of Education, 434023 Jingzhou, China |
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| Abstract: | The geochemical characteristics of crude oils and reservoir core extracts from the Kuche petroleum system are described and studied systematically by means of various geochemical techniques and methods to acquire molecular information. The results suggest crude oils from the petroleum system can be divided into two groups: marine oils and non-marine oils. The former represents the dominant oils found in the area. Tar mats were firstly discovered and determined accurately in terrestrial oil and gas reservoirs, with Lower Tertiary sandstone reservoirs in the Yaha oilfield of the Tarim Basin. However, based on the ratio of 20S/(20S 20R)C 29 sterane as a maturity parameter, lacustrine oils filled into the Tertiary reservoirs in the direction toward the western part of the petroleum system. In contrast, according to the fact that methylcyclohexane indices of eastern oils are greater than those of western oils, the location in which coal-generated oils filled into the Tertiary reservoirs lies in the eastern part of the petroleum system. |
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| Keywords: | reservoir geochemistry hydrocarbon compositional heterogeneity non-marine oil Tarim Basin |
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