The bottom of the cryolithic zone and conditions for the formation of gas hydrates at the T field in the north of West Siberia
https://doi.org/10.18599/grs.2025.3.2
Abstract
The initial data to estimate the gas hydrate stability interval at the T field in West Siberia has been summarized, i.e. the cross-section temperature, reservoir pressure, gas-to-air density, and formation water salinity. The position of the cryolithic zone bottom was modeled by combining the thermal gradient estimated during well testing and the permafrost bottom position based on resistivity logging data.
Due to the ambiguity in interpreting the position of the bottom of the permafrost and cryolithic zone, two options of the cryolithic zone bottom maps were built: the minimum and maximum. Thus, two options of the gas hydrate stability zone bottom maps were built: the minimum and maximum. It is shown that the upper gas-saturated reservoirs of the T field are located in the gas hydrate stability zone.
Supporting agencies: The publication of the article was supported by the Ministry of Science and Higher Education of the Russian Federation under agreement No. 075-10-2022-011 within the framework of the development program for a world-class Research Center.
About the Authors
S. E. Agalakov
Tyumen Petroleum Research Center
Russian Federation
Russian Federation
Sergey E. Agalakov – Dr. Sci. (Geology and Mineralogy), Senior Expert, Expert-Analytical Department
42 Maksim Gorky st., Tyumen, 625048
K. V. Salova
Tyumen Petroleum Research Center
Russian Federation
Russian Federation
Ksenia V. Salova – Chief Specialist, Geological Exploration Department of the North of Western Siberia
42 Maksim Gorky st., Tyumen, 625048
Yu. A. Sizko
Tyumen Petroleum Research Center
Russian Federation
Russian Federation
Yulia A. Sizko – Leading Specialist, Geological Exploration Department of the North of Western Siberia
42 Maksim Gorky st., Tyumen, 625048
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Review
For citations:
Agalakov S.E., Salova K.V., Sizko Yu.A. The bottom of the cryolithic zone and conditions for the formation of gas hydrates at the T field in the north of West Siberia. Georesursy = Georesources. 2025;27(3):25-35. (In Russ.) https://doi.org/10.18599/grs.2025.3.2
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