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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

R.S. Khisamov, N.A. Skibitskaya, N.I. Samokhvalov, K.V. Kovalenko, O.K. Navrotsky

Original article

DOI https://doi.org/10.18599/grs.2021.4.8

66-72
rus.
eng.

open access

Under a Creative Commons license
This study introduces results of lithological, petrophysical and geochemical investigation of Lower Cretaceous (K1) and Middle Jurassic (J2a-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.
 
kerogen, bitumen, source rocks, pyrolysis, extraction
 
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Rais S. Khisamov
Tatneft PJSC
75 Lenin st., 75, Almetyevsk, 423400, Russian Federation
 
Natalia A. Skibitskaya
Oil and Gas Research Institute of the Russian Academy of Sciences
3 Gubkin st., Moscow, 119333, Russian Federation
 
Nikita I. Samokhvalov
Oil and Gas Research Institute of the Russian Academy of Sciences
3 Gubkin st., Moscow, 119333, Russian Federation
 
Kazimir V. Kovalenko
Gubkin Russian State University of Oil and Gas (National Research University) 
65, buil.1, Leninsky av., Moscow, 119991, Russian Federation
 
Oleg K. Navrotsky
NVNIIGG PJSC
70 Moskovskaya st., Saratov, 410012, Russian Federation
 

For citation:

Khisamov R.S., Skibitskaya N.A., Samokhvalov N.I., Kovalenko K.V., Navrotsky O.K. (2021). 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, 23(4), pp. 66–72. DOI: https://doi.org/10.18599/grs.2021.4.8