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Geochemistry of Crude Oils of the Van-Yeganskoye Oil and Gas Condensate Field
Petroleum Chemistry ( IF 1.4 ) Pub Date : 2021-06-16 , DOI: 10.1134/s0965544121060074
E. A. Fursenko , L. S. Borisova , A. I. Burukhina , R. M. Saitov

Abstract

The paper summarizes the available analytical data on the physicochemical properties of the Jurassic and Cretaceous crude oils in the Van-Yeganskoye field, on the percentages of saturated and aromatic compounds in these oils, and on the elemental and structural-group compositions of their resins and asphaltenes (RAM). The hydrocarbon geochemistry and the RAM structural-group compositions show the aquagenic genotype of the tested naphthides. According to their hydrocarbon composition, the Pokur formation oils (K2c) are intensely biodegraded, while samples from the underlying upper Vanden formation (K1aal) are in the initial biodegradation stage. Strong biodegradation of a Cenomanian sample affected its asphaltene composition, specifically by increasing the contribution of naphthenic groups, shortening the paraffin chains, and inducing the oxidation of structures present in the interlayer space of asphaltene aggregates. In general, the study demonstrated that both the HC components and the RAMs have similar ratios of different structural groups, thus confirming the genetic unity of crude oil.



中文翻译:

Van-Yeganskoye油气凝析油田原油地球化学

摘要

本文总结了有关 Van-Yeganskoye 油田侏罗纪和白垩纪原油理化性质、这些油中饱和和芳族化合物的百分比以及它们的树脂和结构组的元素和结构组组成的现有分析数据。沥青质 (RAM)。烃地球化学和 RAM 结构组组成显示了测试的环烷烃的水生基因型。根据它们的碳氢化合物组成,Pokur 地层油 (K 2c ) 被强烈生物​​降解,而来自下范登地层 (K 1aal) 的样品) 处于初始生物降解阶段。Cenomanian 样品的强烈生物降解影响了其沥青质组成,特别是通过增加环烷烃基团的贡献,缩短石蜡链,并诱导沥青质骨料层间空间中存在的结构氧化。总的来说,该研究表明,HC 组分和 RAM 具有相似的不同结构组的比率,从而证实了原油的遗传统一性。

更新日期:2021-06-17
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