Characteristics and Origin Classification of the Oils from the Lower Section of the 4th Member of Shahejie Formation and Kongdian Formation in the Southern Slope of Dongying Depression,
详细信息
- 责任者：Meng Jianghui (State Key Laboratory of Petroleum Resources and Prospecting ; China University of Petroleum ; Beijing 102249 ; China) ; Liu Luofu
- 刊名：Geoscience
- 出版年：2010
- 卷期：24(6)
- 关键词：储层地球化学 ; reservoir geochemistry ; 油气成因 ; oil-gas origin ; 东营凹陷 ; Dongying Sag
- 页码：p.1085-1092
- 图表：4 illus., 2 tables, 14 refs.
- 分类号：1003
- issnNo：ISSN1000-8527
- isbnNo：CN11-2035/P
摘要
Based on the biomarker characteristics analyses of the 17 oil sands and 5 crude oils, the origin of oils found in the study area was classified into four classes. Class-Ⅰ oil distributes in Pingfangwang area and Boxing subsag, being characterized by Pr/Ph>0.8, Ph/nC18<0.6, an extremely low content of gammacerane, a relatively high content of 4-methyl steranes and diasteranes and relatively high ratios of Ts/Tm and hopanes/steranes; Class-Ⅱ oil distributes in Chunhua-Lean and Chenguanzhuang structural belt, characterized by Pr/Ph<0.6, Ph/nC18>2, a high content of gammacerane, a low content of 4-methyl steranes and diasteranes and relatively low ratios of Ts/Tm and hopanes/steranes; Class-Ⅲ oil distributes in the northern gentle slope structural belt of Qingcheng, characterized by the detection of 25-norhopanes and a middle content of gammacerane; Class-Ⅳ oil distributes in Kongdian Formation of Wangjiagang area, characterized by an absolute predominant content of C29 steranes and a high content of gammacerane.
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