Comparative Analysis of the Composition of Carbon-Rich Rocks from Domanik Deposits and the Oil–Water Contact Zone Exemplified by Tatarstan’s Bavly Oilfield

Samples of carbon-rich rocks from domanik deposits and the oil–water contact zone of the Bavly field of the Republic of Tatarstan (Russia), as well as extracts from them, have been studied by thermal analysis, IR and EPR spectroscopy, and gas–liquid chromatography. Significant differences have been...

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Published inPetroleum chemistry Vol. 60; no. 6; pp. 659 - 667
Main Authors Ganeeva, Yu. M., Yusupova, T. N., Barskaya, E. E., Okhotnikova, E. S., Romanov, G. V.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.06.2020
Springer
Springer Nature B.V
Subjects
Alkanes
Analysis
Asphaltenes
Bituminous materials
Chemical composition
Chemistry
Chemistry and Materials Science
Comparative analysis
Deposits
Industrial Chemistry/Chemical Engineering
Infrared analysis
Infrared spectroscopy
Liquid chromatography
Oil field equipment
Oil fields
Organic matter
Oxygen enrichment
Rocks
Thermal analysis
bitumens, asphaltenes
oil–water contact zone
comparative analysis
domanik deposits
bitumoids
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Summary:Samples of carbon-rich rocks from domanik deposits and the oil–water contact zone of the Bavly field of the Republic of Tatarstan (Russia), as well as extracts from them, have been studied by thermal analysis, IR and EPR spectroscopy, and gas–liquid chromatography. Significant differences have been revealed in the chemical composition and physicochemical properties of both soluble and insoluble organic matter from various areas of the Bavly field. Compared with bitumens from the oil–water contact zone, bitumoids from domanik deposits are heavier; they are enriched in oxidized structures and contain elevated levels of isoprenoid hydrocarbons and light normal alkanes. Bitumoid asphaltenes are enriched in sulfur and nitrogen, depleted in oxygen, and characterized by an increased concentration of paramagnetic centers. These differences have to be taken into account when testing technologies for the development of domanik deposits.
ISSN:0965-5441
1555-6239
DOI:10.1134/S0965544120060067