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Correlations between Hydrocarbon and Non-Hydrocarbon Components of Dispersed Gases in the Permafrost Zone of Western Siberia
https://orcid.org/https://orcid.org/0000-0003-0272-0645
https://orcid.org/https://orcid.org/0000-0003-0658-4759
https://orcid.org/https://orcid.org/0000-0003-3179-1506
https://orcid.org/https://orcid.org/0000-0002-9770-4586
The present study assessed the effects of the lithological composition of the Western Siberia permafrost zone on the concentrations of methane (and its homologs), olefins, and hydrogen. This permafrost zone is distinguished by inhomogeneous distribution of hydrocarbon and non-hydrocarbon components across the area and section. The conclusions are based on chromatographic analysis of 199 samples from six core holes located in a multilayer gas condensate field in the Nadym district of the Yamal-Nenets Autonomous Okrug, in the continuous permafrost zone. To minimize external impacts, the core from shallow core holes was used. The core samples were degassed and analyzed chromatographically for hydrocarbons (C1–C8) and non-hydrocarbon gases (H2, CO2, and He). Based on the lithological composition and the concentrations of individual components in the core holes, an interhole correlation was obtained with the distribution of parameters. The gas concentrations were shown to almost unavoidably decrease at lithological interfaces, and this decrease has no effect on the distribution of the components within individual beds, i.e. these components do not accumulate in significant amounts. Because this phenomenon cannot by described by the geochemical barrier concept, a new concept of “geochemical shield” is suggested.
Correlations between Hydrocarbon and Non-Hydrocarbon Components of Dispersed Gases in the Permafrost Zone of Western Siberia
https://orcid.org/https://orcid.org/0000-0003-0272-0645
https://orcid.org/https://orcid.org/0000-0003-0658-4759
https://orcid.org/https://orcid.org/0000-0003-3179-1506
https://orcid.org/https://orcid.org/0000-0002-9770-4586
The present study assessed the effects of the lithological composition of the Western Siberia permafrost zone on the concentrations of methane (and its homologs), olefins, and hydrogen. This permafrost zone is distinguished by inhomogeneous distribution of hydrocarbon and non-hydrocarbon components across the area and section. The conclusions are based on chromatographic analysis of 199 samples from six core holes located in a multilayer gas condensate field in the Nadym district of the Yamal-Nenets Autonomous Okrug, in the continuous permafrost zone. To minimize external impacts, the core from shallow core holes was used. The core samples were degassed and analyzed chromatographically for hydrocarbons (C1–C8) and non-hydrocarbon gases (H2, CO2, and He). Based on the lithological composition and the concentrations of individual components in the core holes, an interhole correlation was obtained with the distribution of parameters. The gas concentrations were shown to almost unavoidably decrease at lithological interfaces, and this decrease has no effect on the distribution of the components within individual beds, i.e. these components do not accumulate in significant amounts. Because this phenomenon cannot by described by the geochemical barrier concept, a new concept of “geochemical shield” is suggested.
Correlations between Hydrocarbon and Non-Hydrocarbon Components of Dispersed Gases in the Permafrost Zone of Western Siberia
https://orcid.org/https://orcid.org/0000-0003-0272-0645
https://orcid.org/https://orcid.org/0000-0003-0658-4759
https://orcid.org/https://orcid.org/0000-0003-3179-1506
https://orcid.org/https://orcid.org/0000-0002-9770-4586
The present study assessed the effects of the lithological composition of the Western Siberia permafrost zone on the concentrations of methane (and its homologs), olefins, and hydrogen. This permafrost zone is distinguished by inhomogeneous distribution of hydrocarbon and non-hydrocarbon components across the area and section. The conclusions are based on chromatographic analysis of 199 samples from six core holes located in a multilayer gas condensate field in the Nadym district of the Yamal-Nenets Autonomous Okrug, in the continuous permafrost zone. To minimize external impacts, the core from shallow core holes was used. The core samples were degassed and analyzed chromatographically for hydrocarbons (C1–C8) and non-hydrocarbon gases (H2, CO2, and He). Based on the lithological composition and the concentrations of individual components in the core holes, an interhole correlation was obtained with the distribution of parameters. The gas concentrations were shown to almost unavoidably decrease at lithological interfaces, and this decrease has no effect on the distribution of the components within individual beds, i.e. these components do not accumulate in significant amounts. Because this phenomenon cannot by described by the geochemical barrier concept, a new concept of “geochemical shield” is suggested.
Correlations between Hydrocarbon and Non-Hydrocarbon Components of Dispersed Gases in the Permafrost Zone of Western Siberia
Pet. Chem.
Naumenko, V. O. (author) / Zavatsky, M. D. (author) / Belonosov, A. Yu. (author) / Ponomarev, A. A. (author)
Petroleum Chemistry ; 63 ; 477-486
2023-04-01
10 pages
Article (Journal)
Electronic Resource
English
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