Study of the component composition of organic matter of the East Pre-Caucasian basin rocks based on the results of lithological, petrophysical and geochemical studies
https://doi.org/10.18599/grs.2021.4.8
Abstract
This study introduces results of lithological, petrophysical and geochemical investigation of Lower Cretaceous (K1 ) and Middle Jurassic (J2 a-b) rocks of East Pre-Caucasian basin.
According to pyrolytic and bituminological studies method of separate determination of kerogen and bitumen concentration been developed. In accordance with this method differentiation of organic matter components in different lithotypes of rocks been described. Also relationship between bitumen and kerogen concentrations been revealed.
The majority of samples have poor to fair organic richness and poor source potential. Kerogen type is commonly presented by type III and stages of maturity characterized by stages PC3 to MC3 . Bitumen compounds have low concentrations of asphaltenes and aromatic hydrocarbons and mainly contains light and heavy resins.
Based on petrophysical and geochemical studies a close relationship between the concentration of organic carbon and the weight concentration of potassium nuclides was obtained. This relationship indicates that kerogen in the sediments under consideration is associated with clay minerals, which is also confirmed by the mineral composition of the rocks.
About the Authors
R. S. Khisamov
Tatneft PJSC
Russian Federation
Russian Federation
Rais S. Khisamov – DSc (Geology and Mineralogy), Professor
75 Lenin st., 75, Almetyevsk, 423400
N. A. Skibitskaya
Oil and Gas Research Institute of the Russian Academy of Sciences
Russian Federation
Russian Federation
Natalia A. Skibitskaya – PhD (Geology and Mineralogy), Leading Researcher
3 Gubkin st., Moscow, 119333
N. I. Samokhvalov
Oil and Gas Research Institute of the Russian Academy of Sciences
Russian Federation
Russian Federation
Nikita I. Samokhvalov – Postgraduate Student, Senior Engineer
3 Gubkin st., Moscow, 119333
K. V. Kovalenko
Gubkin Russian State University of Oil and Gas (National Research University)
Russian Federation
Russian Federation
Kazimir V. Kovalenko – DSc (Geology and Mineralogy), Professor
65, buil.1, Leninsky av., Moscow, 119991
O. K. Navrotsky
NVNIIGG PJSC
Russian Federation
Russian Federation
Oleg K. Navrotsky – DSc (Geology and Mineralogy), Leading Researcher
70 Moskovskaya st., Saratov, 410012
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Review
For citations:
Khisamov R.S., Skibitskaya N.A., Samokhvalov N.I., Kovalenko K.V., Navrotsky O.K. Study of the component composition of organic matter of the East Pre-Caucasian basin rocks based on the results of lithological, petrophysical and geochemical studies. Georesursy = Georesources. 2021;23(4):66-72. (In Russ.) https://doi.org/10.18599/grs.2021.4.8
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