Geochemical Characteristics of Light Hydrocarbons in Jinhu Sag and It’s Significance
详细信息
- 责任者：Song Ning (School of Petroleum Engineering ; Changzhou University ; Changzhou 213016 ; China) ; Guo Haiying
- 刊名：Natural Gas Geoscience
- 出版年：2013
- 卷期：24(1)
- 关键词：原油 ; crude oil ; 轻烃 ; light hydrocarbon ; 苏北盆地 ; Subei Basin
- 页码：p.123-128
- 图表：illus., 22 refs.
- 分类号：1003
- issnNo：ISSN1672-1926
- isbnNo：CN62-1177/TE
摘要
In this paper,we measure the chemical composition of light hydrocarbons,the Mango parameters,and thermal maturity for 40 oil samples from the Jinhu sag.The methylclohexane index reveals that the oils are derived from type I and type II kerogen.The C5 light hydrocarbons indicate that the organic matter is composed of both sapropelic and humic.The Mango parameters K1 is consistent with the chemically stable structure model of light hydrocarbons,suggesting that the oils would be formed in the similar depositional environment of organic matter.Predominance of C5 to C7 tricyclic light hydrocarbon abundance is more than that of pentacyclic and hexacyclic light hydrocarbon,showing that oils are mainly originated from lacustrine source rocks.Both heptane value and isoheptane index are little,indicating the thermal maturity of oils is low.The formation temperature of oils is in range of 120-128℃.The results provide the geochemical information for further understanding of oils and source rock in the Jinhu sag.
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