Skeleton structure hydrocarbons in different genetic types of oils and condensates in Western Yakutia
https://doi.org/10.31242/2618-9712-2021-26-4-43-53
Abstract
This work is devoted to the study of the content, composition and character of the distribution of adamantane hydrocarbons. The objects of investigation were naphthides of different genetic types from the deposits in Western Yakutia: oils and condensates from the Vendian-Cambrian sediments, which were generated by planktonic algal organic matter of marine facies (I genotype), and the Mesozoic oils and condensates, which were generated by continental terragenous organic matter (II genotype). The individual hydrocarbon composition of the fractions was determined by chromatography-mass spectrometry on the Agilent 6890 set, which had an interface with the high-effective mass-selective detector Agilent 5973N. The characteristic distribution pattern of adamantane and its methyl derivatives was obtained by scanning for fragmentary m/z ions 135, 136, 149, 163, 177, 188. As a result of the conducted research, the presence of adamantane hydrocarbons of the composition from C10H16 to C14H24 was established for the studied samples of naphthides. It was shown that adamantane hydrocarbons within each genetic type were characterized by a similar composition and distribution. At the same time, certain differences were detected in the distribution of naphthides of different genesis. The naphthides of I genotype (generated by planktonic algal organic matter of marine facies) differed from the naphthides of II genotype (generated by terragenous organic matter of continental facies) by lower content of adamantine and its methyland dimethylpropionic derivatives, a high content of triand tetramethylguanidine, lower values of C11/C13 and C12/C13 ratios, and the values of ethyuladamantane index. The obtained data on the composition of adamantane hydrocarbons can be used as additional geochemical criteria for determination of the genesis of naphthides.
Keywords
About the Authors
O. N. ChalayaRussian Federation
CHALAYA, Olga Nikolaevna, Cand. Sci. (Geology and Mineralogy), leading researcher
2 Petrovskogo st., Yakutsk 677980
Researcher ID: J-9329-2018
S. Kh. Lifshits
Russian Federation
LIFSHITS, Sara Khaimovna, Cand. Sci. (Chemistry), leading researcher
2 Petrovskogo st., Yakutsk 677980
Researcher ID: K-1438-2018
V. A. Kashirtsev
Russian Federation
KASHIRCEV, Vladimir Arkadievich, corresponding member of RAS, Dr. Sci. (Geology and Mineralogy), chief researcher
2 Petrovskogo st., Yakutsk 677980;
3 Akademika Koptyuga ave, Novosibirsk 630090
Researcher ID: N-1655-2014
I. N. Zueva
Russian Federation
ZUEVA, Iraida Nikolaevna, Cand. Sci. (Geology and Mineralogy), leading researcher
2 Petrovskogo st., Yakutsk 677980
Researcher ID: J-9373-2018
Yu. S. Glyaznetsova
Russian Federation
GLYAZETSOVA, Yulia Stanislavovna, Cand. Sci. (Chemistry), head of the laboratory
2 Petrovskogo st., Yakutsk 677980
Researcher ID: J-9714-2018
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Review
For citations:
Chalaya O.N., Lifshits S.Kh., Kashirtsev V.A., Zueva I.N., Glyaznetsova Yu.S. Skeleton structure hydrocarbons in different genetic types of oils and condensates in Western Yakutia. Arctic and Subarctic Natural Resources. 2021;26(4):43-53. (In Russ.) https://doi.org/10.31242/2618-9712-2021-26-4-43-53