Natural Gas Liberations around Production Wells at Russian Arctic Gas Fields

Gas samples from gas liberations around wellheads on two giant natural gas fields in West Siberia (Bovanenkovo and Yamburg) have been tested for their carbon isotopic and molecular compositions. Results have shown local, microbial genesis of gas and that its source is permafrost at both gas fields....

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Bibliographic Details
Published in:Geosciences
Main Author: Vladimir S. Yakushev
Format: Article in Journal/Newspaper
Language:English
Published: MDPI AG 2020
Subjects:
permafrost gas
methane carbon isotopic composition
gas molecular composition
gas production well
thawing radius
Geology
QE1-996.5
Arctic
Bovanenkovo
Yamburg
permafrost
Siberia
Online Access:https://doi.org/10.3390/geosciences10050184
https://doaj.org/article/1a834acdc8a74ade9c988a38b11731df
Description
Summary:Gas samples from gas liberations around wellheads on two giant natural gas fields in West Siberia (Bovanenkovo and Yamburg) have been tested for their carbon isotopic and molecular compositions. Results have shown local, microbial genesis of gas and that its source is permafrost at both gas fields. Gas liberation is caused by permafrost rock massif thawing around working well. Gas liberations can appear at different distances from the casing inside the radius of thawing. Two gas samples taken from gas liberations at casing border have shown thermogenic origin, which was explained by deep gas leakage through the casing. Gas liberations from deep production horizons are few, and they concentrate around the casing. Permafrost gas liberations are numerous, and they are spread at different distances from the wellhead.

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