Research output: Contribution to journal › Article › peer-review
Hydrocarbon composition and structural parameters of resins and asphaltenes of naphthenic oils of northern West Siberia. / Pevneva, G. S.; Fursenko, E. A.; Voronetskaya, N. G. et al.
In: Russian Geology and Geophysics, Vol. 58, No. 3-4, 01.04.2017, p. 425-433.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Hydrocarbon composition and structural parameters of resins and asphaltenes of naphthenic oils of northern West Siberia
AU - Pevneva, G. S.
AU - Fursenko, E. A.
AU - Voronetskaya, N. G.
AU - Mozhayskaya, M. V.
AU - Golovko, A. K.
AU - Nesterov, I. I.
AU - Kashirtsev, V. A.
AU - Shevchenko, N. P.
PY - 2017/4/1
Y1 - 2017/4/1
N2 - The composition of saturated and aromatic hydrocarbons and the structural-group characteristics of resins and asphaltenes in four oils of northern West Siberia have been studied. As follows from the distribution of hydrocarbons, the Cenomanian oils (pools in the beds PK and K2c) of the Russkoe, Barsukovskoe, and Pangodinskoe fields are naphthenic and the Pangodinskoe oil sample from the Lower Cretaceous pool (bed BN9) is methanoic. The hydrocarbon composition pattern of the saturated fraction and the characteristics of the heterocyclic components of these oils point to their formation from dispersed organic matter of mixed genesis in the oil window. Hence, the oil source rocks are localized at depths much greater than the present-day level of the oil pools. Secondary (cryptohypergene) alterations (oxidation and biodegradation) in the shallow-depth oils determined their current predominantly naphthenic composition and considerably hamper reconstruction of the types of initial dispersed organic matter. We assume that the mixed genetic type of the studied oils is not only due to their heterogeneous source but also due to the reorganization of primary oil pools at the Cenozoic stage of tectogenesis. The Cenomanian Russkoe and Pangodinskoe naphthenic oils are saturated with adamantoids, which can be selectively accumulated during biodegradation.
AB - The composition of saturated and aromatic hydrocarbons and the structural-group characteristics of resins and asphaltenes in four oils of northern West Siberia have been studied. As follows from the distribution of hydrocarbons, the Cenomanian oils (pools in the beds PK and K2c) of the Russkoe, Barsukovskoe, and Pangodinskoe fields are naphthenic and the Pangodinskoe oil sample from the Lower Cretaceous pool (bed BN9) is methanoic. The hydrocarbon composition pattern of the saturated fraction and the characteristics of the heterocyclic components of these oils point to their formation from dispersed organic matter of mixed genesis in the oil window. Hence, the oil source rocks are localized at depths much greater than the present-day level of the oil pools. Secondary (cryptohypergene) alterations (oxidation and biodegradation) in the shallow-depth oils determined their current predominantly naphthenic composition and considerably hamper reconstruction of the types of initial dispersed organic matter. We assume that the mixed genetic type of the studied oils is not only due to their heterogeneous source but also due to the reorganization of primary oil pools at the Cenozoic stage of tectogenesis. The Cenomanian Russkoe and Pangodinskoe naphthenic oils are saturated with adamantoids, which can be selectively accumulated during biodegradation.
KW - adamantoids
KW - alkylarenes
KW - asphaltenes
KW - composition
KW - naphthene-arenes
KW - naphthenic oils
KW - resins
KW - saturated hydrocarbons
KW - steranes
KW - structure
KW - terpanes
KW - West Siberia
KW - CRUDE OILS
KW - BIOMARKERS
KW - BASIN
UR - http://www.scopus.com/inward/record.url?scp=85018521609&partnerID=8YFLogxK
U2 - 10.1016/j.rgg.2016.09.018
DO - 10.1016/j.rgg.2016.09.018
M3 - Article
AN - SCOPUS:85018521609
VL - 58
SP - 425
EP - 433
JO - Russian Geology and Geophysics
JF - Russian Geology and Geophysics
SN - 1068-7971
IS - 3-4
ER -
ID: 10040330