Analysis of the heterogeneity of the results of hydrogeochemical monitoring of the Aptian-Albian-Cenomanian complex in the fields of Western Siberia
https://doi.org/10.31660/0445-0108-2025-2-39-53
Abstract
This paper presents findings on the reservoir water of the Aptian-Albian-Cenomanian water-bearing complexes within the Western Siberian Artesian Basin, based on long-term monitoring conducted at oil and gas fields. The study is relevant due to the limited understanding of current hydrogeochemical conditions in the basin, particularly regarding the variability in groundwater chemical composition observed over the monitoring period. We analyzed a substantial dataset comprised of over 4,700 samples of the reservoir water from the Aptian-Albian-Cenomanian sediments at various monitoring sites. To organize and summarize the gathered data for each field, we calculated the average annual concentrations of each component found in the waters, in addition to their standard deviations over time. We also compared the methodological errors associated with laboratory methods for measuring the major components against the standard deviations in the observed data. Furthermore, we assessed the natural heterogeneity of the chemical composition of groundwater within the Aptian-Albian-Cenomanian water-bearing complexes across the studied fields. The results of our long-term hydrogeochemical monitoring reveal significant variability in components such as calcium, bicarbonate, iodine, and bromine within the groundwater, even among individual fields. This variability is largely attributed to the local heterogeneity of the com-position and properties of the surrounding sediments.
About the Authors
A. G. PlavnikRussian Federation
Andrey G. Plavnik, Doctor of En-gineering, Chief Researcher; Director
Tyumen
Yu. I. Salnikova
Russian Federation
Yuliya I. Salnikova, Head of the Laboratory of Petroleum Hydrogeology
Tyumen
V. А. Beshentsev
Russian Federation
Vladimir А. Beshentsev, Doctor of Geology and Mineralogy, Associate Pro-fessor at the Department of Geology of Oil and Gas Fields
Tyumen
T. V. Semyonova
Russian Federation
Tatyana V. Semyonova, Candidate of Geology and Mineralogy, Associate Professor at the Department of Geology of Oil and Gas Fields
Tyumen
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Review
For citations:
Plavnik A.G., Salnikova Yu.I., Beshentsev V.А., Semyonova T.V. Analysis of the heterogeneity of the results of hydrogeochemical monitoring of the Aptian-Albian-Cenomanian complex in the fields of Western Siberia. Oil and Gas Studies. 2025;(2):39-53. (In Russ.) https://doi.org/10.31660/0445-0108-2025-2-39-53