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Distribution Patterns of Main Structural-Group Parameters of Crude Oils from North Caucasus Oil-and-Gas Basin According to 1H NMR Data
Petroleum Chemistry ( IF 1.3 ) Pub Date : 2022-03-11 , DOI: 10.1134/s0965544122060020
M. B. Smirnov 1 , N. A. Vanyukova 1
Affiliation  

Abstract

Using the 1H NMR examination of a representative set of crude oils (86 samples, 54 oil fields and exploration areas) from the North Caucasus oil-and-gas basin, we obtained, for the first time, the structural-group composition of crude oils over the entire basin. Distribution density plots were presented for all the composition parameters measured. It was demonstrated that, because none of the parameters obeys normal distribution, non-parametric statistical analysis is needed for the data processing. In particular, medians and median confidence intervals (the latter being determined by signed-rank test), rather than means or root-mean-square deviations, should be relied upon. The North Caucasus oils were found to have a markedly lower content of aromatics (both monocyclic and bi-/polycyclic) than the crude oils from Western Siberia and Volga–Urals. Compared with the Eastern Siberia basin, the North Caucasus oils are distinguished by a slightly higher presence of bicyclic and polycyclic aromatics. At the same time, the North Caucasus oils exhibit the highest content of normal and monomethylated alkanes among the four basins under consideration. The North Caucasus oils were classified into three stratigraphic groups according to their oil composition. The first group consists of Triassic and Jurassic reservoirs. These crude oils have the lowest content of aromatics and the highest content of normal and monomethylated alkanes. The second group is the Cretaceous sediments, and the third group includes Paleogenic and Neogenic deposits. The content of aromatics increases consistently from the bottom to the top of the section.



中文翻译:

北高加索油气盆地原油主要结构组参数的1H NMR分布格局

摘要

使用1对北高加索油气盆地一组具有代表性的原油(86个样品,54个油田和勘探区)进行H核磁共振检查,我们首次获得了整个北高加索地区原油的结构群组成。整个盆地。为所有测量的组成参数呈现分布密度图。结果表明,由于没有一个参数服从正态分布,因此数据处理需要进行非参数统计分析。特别是,应该依赖中位数和中位数置信区间(后者由符号秩检验确定),而不是均值或均方根偏差。与来自西西伯利亚和伏尔加-乌拉尔的原油相比,发现北高加索地区的原油中芳烃(单环和双环/多环)含量明显较低。与东西伯利亚盆地相比,北高加索石油的特点是双环和多环芳烃的含量略高。同时,北高加索石油在所考虑的四个盆地中表现出最高的正构烷烃和单甲基化烷烃含量。北高加索地区的石油根据其石油成分分为三个地层组。第一组包括三叠系和侏罗系储层。这些原油的芳烃含量最低,而正构烷烃和单甲基化烷烃的含量最高。第二组是白垩纪沉积物,第三组包括古成因和新成因沉积。芳烃含量从该部分的底部到顶部持续增加。北高加索油的特点是双环和多环芳烃的含量略高。同时,北高加索石油在所考虑的四个盆地中表现出最高的正构烷烃和单甲基化烷烃含量。北高加索地区的石油根据其石油成分分为三个地层组。第一组包括三叠系和侏罗系储层。这些原油的芳烃含量最低,而正构烷烃和单甲基化烷烃的含量最高。第二组是白垩纪沉积物,第三组包括古成因和新成因沉积。芳烃含量从该部分的底部到顶部持续增加。北高加索油的特点是双环和多环芳烃的含量略高。同时,北高加索石油在所考虑的四个盆地中表现出最高的正构烷烃和单甲基化烷烃含量。北高加索地区的石油根据其石油成分分为三个地层组。第一组包括三叠系和侏罗系储层。这些原油的芳烃含量最低,而正构烷烃和单甲基化烷烃的含量最高。第二组是白垩纪沉积物,第三组包括古成因和新成因沉积。芳烃含量从该部分的底部到顶部持续增加。在所考虑的四个盆地中,北高加索石油的正构烷烃和单甲基化烷烃含量最高。北高加索地区的石油根据其石油成分分为三个地层组。第一组包括三叠系和侏罗系储层。这些原油的芳烃含量最低,而正构烷烃和单甲基化烷烃的含量最高。第二组是白垩纪沉积物,第三组包括古成因和新成因沉积。芳烃含量从该部分的底部到顶部持续增加。在所考虑的四个盆地中,北高加索石油的正构烷烃和单甲基化烷烃含量最高。北高加索地区的石油根据其石油成分分为三个地层组。第一组包括三叠系和侏罗系储层。这些原油的芳烃含量最低,而正构烷烃和单甲基化烷烃的含量最高。第二组是白垩纪沉积物,第三组包括古成因和新成因沉积。芳烃含量从该部分的底部到顶部持续增加。第一组包括三叠系和侏罗系储层。这些原油的芳烃含量最低,而正构烷烃和单甲基化烷烃的含量最高。第二组是白垩纪沉积物,第三组包括古成因和新成因沉积。芳烃含量从该部分的底部到顶部持续增加。第一组包括三叠系和侏罗系储层。这些原油的芳烃含量最低,而正构烷烃和单甲基化烷烃的含量最高。第二组是白垩纪沉积物,第三组包括古成因和新成因沉积。芳烃含量从该部分的底部到顶部持续增加。

更新日期:2022-03-11
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