Isotopic Composition and Nature of Gases in the North of Western Siberia

Veklich, M.; Goncharov, I.V.; Zherdeva, A. V.; Oblasov, N.; Samoilenko, V. V.

doi:10.3997/2214-4609.202134156

Cited by 3 publications

(2 citation statements)

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“…. −92% in different areas of Yamal [19,23,24,48,49,65]. Investigation of the crater lake bottom was carried out from two inflatable "Lotsman" boats.…”

Section: Description Of the Region And The Object Of Studymentioning

confidence: 99%

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Complex of Geophysical Studies of the Seyakha Catastrophic Gas Blowout Crater on the Yamal Peninsula, Russian Arctic

Bogoyavlensky

Nikonov

et al. 2020

Geosciences

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This article describes the main results of two Arctic expeditions in 2017–2018 to study the Seyakha Crater in the north of Western Siberia, Yamal Peninsula. It was formed on a place of a pingo-like feature (PLF) by huge blowout, self-ignition, and explosion of gas on 28 June 2017. In 2018, for the first time, the integration of geophysical studies on the Yamal Peninsula revealed in detail an Arctic gas-blowout crater within a river channel and adjacent land with permafrost. On the basis of unmanned aerial vehicle photography, echo sounding, and ground penetrating radar survey data processing, a 3D digital elevation model (DEM) of the crater and the structure of near-surface deposits was created. A previously unknown uplift inside the permafrost layers, probably connected with the processes of gas chamber formation, was revealed. A long period of continuous gas emission (mainly, biogenic methane) from the Seyakha C11 Crater (2017–2019) and other existing data show evidence for a gas-dynamic mechanism of the PLF growth and a volcanic type of eruption.

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“…. −92% in different areas of Yamal [19,23,24,48,49,65]. Investigation of the crater lake bottom was carried out from two inflatable "Lotsman" boats.…”

Section: Description Of the Region And The Object Of Studymentioning

confidence: 99%

“…This definitely confirmed the bacterial genesis of the gas. Based on published data, content of biogenic methane carbon δ 13 С ranges from -55‰ to -88...-92‰ in different areas of Yamal [19,23,24,48,49,65].…”

Section: Description Of the Region And The Object Of Studymentioning

confidence: 99%

Complex of Geophysical Studies of the Seyakha Catastrophic Gas Blowout Crater on the Yamal Peninsula, Russian Arctic

Bogoyavlensky

Nikonov

et al. 2020

Geosciences

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Nature of Hydrocarbon Fluids at the Fields in the North of Western Siberia: the Geochemical Aspect

Goncharov

Veklich²,

Oblasov³

et al. 2023

Geochem. Int.

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Nature of Hydrocarbon Fluids at the Fields in the North of Western Siberia: the Geochemical Aspect

Goncharov,

Veklich,

Oblasov

et al. 2023

Geohimiâ

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The paper presents original results of comprehensive geochemical studies of samples of oils, condensates, gases, core, and cuttings from wells drilled in the north of Western Siberia. The studies involved chromatographic and mass spectrometric determinations of the molecular and isotopic composition of the oils, gases, condensates, and rock extracts. Analysis of the results, considered together with literature data, made it possible to draw conclusions regarding the source of the hydrocarbons and the mechanism of formation of their accumulations. Information on the molecular and isotopic composition of the fluids and the distribution of their accumulations and fields in the sedimentary cover shows that most of them are of polychronic and polygenic origin. Features of the molecular and isotopic composition of the fluids make it possible to evaluate the contribution of various sources to the formation of hydrocarbon accumulations. The composition of their liquid component was formed as a result of the generation of hydrocarbons by the organic matter of Jurassic source rocks. The Lower and Middle Jurassic rocks with non-marine organic matter also made a significant contribution to the formation of the gas component of deposits in the north of Western Siberia, whereas the Cretaceous rocks generated only dry gas and were likely the main source of gas for the giant fields, whose methane has a light carbon isotope composition. The use of the isotopic composition of carbon in combination with molecular parameters makes it possible to clarify the conditions under which a particular field was formed and to elucidate the migration pathways and distances of hydrocarbon fluids to their accumulation sites

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Isotopic Composition and Nature of Gases in the North of Western Siberia

Cited by 3 publications

References 0 publications

Complex of Geophysical Studies of the Seyakha Catastrophic Gas Blowout Crater on the Yamal Peninsula, Russian Arctic

Complex of Geophysical Studies of the Seyakha Catastrophic Gas Blowout Crater on the Yamal Peninsula, Russian Arctic

Nature of Hydrocarbon Fluids at the Fields in the North of Western Siberia: the Geochemical Aspect

Nature of Hydrocarbon Fluids at the Fields in the North of Western Siberia: the Geochemical Aspect

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