Geochemistry and Origin of Oil and Natural Gas in Baimiao Area of Dongpu Depression
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摘要: 白庙构造是东濮凹陷南部地区的一个含凝析油的富气构造。在研究油藏基本地质特征的基础上,应用多种地球化学手段研究了气藏中天然气组分、甲烷同位素及惰性气体同位素变化规律、凝析油族组成、饱和烃色谱、色质生物标志物特征,进行了油气源分析,探讨了气藏的形成时间与次序,白庙气藏具有多源、多期、复合成藏的特点。Abstract: Baimiao structure in the south of Dongpu depression is a trap with rich natural gas and condensate. The reservoir has some characters of many source rocks and many periods of formation and interruption. Based on the study of primarily geolegical characters, this paper investigates the variation law of carbon isotope of methane in natural gas and density of condensate as well as the character of biomarkers in condensate, which helps discussion on origin of oil and gas and their migration direction and time to the whole reservoir, together with applying of more geochemical methods in authigenic minerals.
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Key words:
- gas /
- condensate oil /
- geochemistry characteristic /
- Dongpu depression
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