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Reservoir geochemistry of the Tazhong oilfield in the Tarim Basin, China, Part I. Geochemical characteristics and genetic classification of crude oils 被引量：10

Reservoir geochemistry of the Tazhong oilfield in the Tarim Basin, China, Part I. Geochemical characteristics and genetic classification of crude oils
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摘要 According to the assemblage characteristics of saturated hydrocarbon biomarkers in crude oils and their geochemical implications, this study has proposed, for the first time, the criteria for the genetic classification of crude oils in the Tazhong area of the Tarim Basin, China. Crude oils from the area studied are classified as three genetic types: type-I is characterized by the low contents of C29 norhopane, extremely abundant contents of gammacerane, low contents of rearranged sterane and relatively high contents of regular C28 sterane; the geochemical properties of type-II crude oils are opposite to those of type-I crude oils; the parameters for type-III crude oils are intermediate between type-I and type-II. Results of oil correlation indicated that type-I crude oils were derived from Cambrian-Lower Ordovician hydrocarbon source rocks, type-II curde oils originated from Middle-Upper Ordovician hydrocarbon source rocks and type-III crude oils are of mixed origin. According to the assemblage characteristics of saturated hydrocarbon biomarkers in crude oils and their geochemical implications, this study has proposed, for the first time, the criteria for the genetic classification of crude oils in the Tazhong area of the Tarim Basin, China. Crude oils from the area studied are classified as three genetic types： type-Ⅰ is characterized by the low contents of C29 norhopane, extremely abundant contents of gammacerane, low contents of rearranged sterane and relatively high contents of regular C28 sterane; the geochemical properties of type-Ⅱ crude oils are opposite to those of type-Ⅰ crude oils; the parameters for type-Ⅲ crude oils are intermediate between type-Ⅰ and type-Ⅱ. Results of oil correlation indicated that type-Ⅰ crude oils were derived from Cambrian-Lower Ordovician hydrocarbon source rocks, type-Ⅱ curde oils originated from Middle-Upper Ordovician hydrocarbon source rocks and type-Ⅲ crude oils are of mixed origin.
作者 张敏 黄光辉 胡国艺
机构地区 Department of Geochemistry Langfang Branch of Research Institution of Petroleum Exploration and Development
出处 《Chinese Journal Of Geochemistry》 EI CAS 2006年第4期328-331,共4页 中国地球化学学报
基金 This research was funded by the State "Tenth Five-Year Plan" Key Science and Technology Program (2004BA616A02-01-01-03).
关键词 油类相关性 石油 塔里木盆地 中国 biomarker oil correlation genetic classification of crude oils Tazhong area Tarim Basin China
分类号 P59 [天文地球—地球化学]
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参考文献9

  • 1张敏,赵红静.Reservoir Geochemistry of the Kuche Petroleum System in the Tarim Basin, China[J].Chinese Journal Of Geochemistry,2004,23(2):163-168. 被引量：2
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二级参考文献10

  • 1[10]Zhang Min, 1996a, Discovery and its geological significance of the tar mats in terrestrial gas-condensate reservoirs [J]: Chinese Science Bulletin, v.41, p.1967-1969.
  • 2[1]Ahsan, S.A., D.A. Karlsen, A.W. Mitchell, and N. Rothwell, 1998, Inter and intrafield hydrocarbon compositional variations in the Ula and the Gyda Fields (Central Graben-North Sea)-implication for understanding the controls on hydrocarbon distribution within and between these fields [J]: Organic Geochemistry, v.29, p. 449-462.
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  • 10[9]Whilhems, A. and S.R. Later, 1994b, Origin of tar mats in petroleum reservoirs (Part Ⅱ): Formation mechanisms for tar mats [J]: Marine Petroleum Geology, v.11, p.442-456.

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Chinese Journal Of Geochemistry
2006年 第4期

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