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Mixing Characteristics of Oil Inclusions with Different Thermal Maturities in the Wenliu Uplift, Dongpu Depression, Bohai Bay Basin, North China
Journal of Earth Science ( IF 3.3 ) Pub Date : 2020-12-27 , DOI: 10.1007/s12583-020-1356-0
Xiuyan Liu , Honghan Chen , Xuewei Xiao , Hongan Zhang , Tianwu Xu

Multiple types of oil inclusions with different fluorescence colors have been detected in the northern Dongpu depression. Recent evidences show that these inclusions may have been trapped simultaneously or during a very short period. Therefore, whether these oils were mixed before trapping is unknown. In this study, we analyzed the petrography and fluorescence spectral characteristics of oil inclusions in the Wenliu uplift in the northern Dongpu depression, and assessed the data with the oil mixing ratio curve obtained in the previous experiment. The results show that there are three types of oil inclusions (type I, type II and type III) with yellow, green and blue fluorescence colors, corresponding to low-mature, medium-mature and high-mature oil, respectively. The “pure” oil inclusions, do exist in type II and type III group of oil inclusions, showing the medium-mature oil was generated from the source rock rather than being formed by the mixture of high-mature and low-mature end oils. Most of the oil inclusions are mixtures of high-mature and medium-mature end oils from the sub-sags to the Wenliu uplift, the mixing degree increases to close to 50%. The oil between the Qianliyuan sub-sag and the Wenliu uplift was mainly mixed by medium mature oils, whereas the oil between the Liutun sub-sag and the Wenliu uplift was mainly mixed by high mature oil.



中文翻译:

华北渤海湾盆地东圃the陷温流隆起不同热成熟度油包裹体的混合特征

在东埔凹陷北部发现了多种类型的具有不同荧光颜色的油包裹体。最近的证据表明,这些夹杂物可能同时或在很短的时间内被捕获。因此,未知这些油是否在捕集之前被混合。在这项研究中,我们分析了东圃depression陷北部温流隆起的油包裹体的岩石学和荧光光谱特征,并使用先前实验获得的油混合比曲线评估了数据。结果表明,有三种类型的油夹杂物(I型,II型和III型)具有黄色,绿色和蓝色荧光色,分别对应于低成熟度,中成熟度和高成熟度油。II类和III类油包裹体中确实存在“纯”油包裹体,表明中成熟油是从烃源岩中产生的,而不是由高成熟度和低成熟度的终油的混合物形成的。大部分夹杂物是从下陷至文留隆起的高成熟和中成熟终油的混合物,混合度提高到接近50%。前里缘凹陷与温流隆起之间的油主要是中熟油混合,而柳屯凹陷与温流隆起之间的油主要是高成熟油混合。

更新日期:2020-12-27
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