The Distribution and Application of Biomarkers in Biyang Basin

Chen Junhong; Fu Jiamo; Sheng Guoying; R.P.Philp; Ma Wanyi

Abstract

In this paper, the distribution of biomarkers in crude oils, tar sand bitumen and source rocks were studied and applied for oil/oil, oil/source correlation and biodegradation in Biyang Basin, China. Four oil samples(oil 1-4) collected from Biyang Basin were divided into two types: Type Ⅰ(oil 1-3) and Type Ⅱ(oil 4). Type I oil has lower values for ratios of Pr/Ph and 4-methylsterane/sterane, and higher values for ratio of sterane/hopane and gammacerane index than type Ⅱ oil. By oil/source correlation, it was believed that the source rocks with lower Pr/ Ph ratio and higher gammacerane index from Eh, formation had more contribution to the oil accumulation in Biyang Basin than other source rocks. Tar sand bitumen colllected from northern slope were biodegraded. Corrected Gammacerane Index, i, e. gammacerane /(C₂₉-25-norhopane+C₃₀-hopane)×100, of tar Sand bitumen wrer compared with that of regular crude oils. The quite close values indicate that tar sand bitumen have same source as type Ⅰ oils.

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The Distribution and Application of Biomarkers in Biyang Basin

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References

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通讯作者: 陈斌, bchen63@163.com

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