ESR Spectroscopy in Geochemical Studies of Asphaltenes of Crude Oils from Tatarstan Oil Fields

被引：1

作者：

Ganeeva, Yu. M. ^{[1
]}

Yusupova, T. N. ^{[1
]}

Barskaya, E. E. ^{[1
]}

Okhotnikova, E. S. ^{[1
]}

Morozov, V. I. ^{[1
]}

机构：

[1] Russian Acad Sci, Arbuzov Inst Organ & Phys Chem, Kazan Sci Ctr, Fed Res Ctr, Kazan 420088, Russia

来源：

PETROLEUM CHEMISTRY | 2023年 / 63卷 / 04期

关键词：

asphaltenes; ESR spectroscopy; crude oils; Devonian deposit; Carboniferous deposit; RESONANCE; COMPLEXES; FEATURES;

D O I：

10.1134/S0965544123030179

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

ESR spectra of asphaltenes from a series of crude oils from the Devonian and Carboniferous deposits of the South-Tatar Dome in Tatarstan with low vanadium content and of vanadiferous crude oils from deposits of the Melekess depression in Tatarstan are analyzed. For asphaltenes from Devonian oils, the correlation between the concentrations of stable free radicals (SFR) and vanadyl complexes (VCs) has direct trend, whereas for asphaltenes from Carboniferous oils the trend is inverse. Taking into account the previously revealed inverse trend for asphaltenes of vanadium-enriched highly viscous crude oils [1], the opposite trends in SFR-VC correlations (direct and inverse) suggest different structures of asphaltene molecules in oils with different vanadium content and, correspondingly, different sources and conditions of the formation of oil deposits. Specific features of the ESR characteristics of asphaltenes of core and extractable oils and of oils from Devonian and Carboniferous deposits are revealed.

引用

页码：403 / 412

页数：10

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