Hydrogeochemical conditions of the Lower-Middle Jurassic complex, the Еm-Еgovsky oil field
https://doi.org/10.31660/0445-0108-2022-2-9-18
Abstract
The research relevance of the structure of deep oil and gas horizons' hydrogeochemical fields in Western Siberia is associated with applied and fundamental issues of oil and gas hydrogeology. The article presents the hydrogeochemical field analysis results of the LowerMiddle Jurassic hydrogeological complex, the Em-Egovsky oil field, which is part of the Krasnoleninsk fields group. The research aim was to establish the reasons for the contrast formation in the hydrogeochemical deposit field. We analyzed ion-salt composition of waters over the area (mainly groundwaters belong to the hydrocarbonate-sodium type according to V. A. Sulin) and revealed a fairly large scatter of salinity values (from 4.5 to 16.1 g/dm3 , with an average value of 8.6 g/dm3 ). Study of the genetic sodium-chloride behavior (values vary from 0.9 to 1.4 with an average of 1.1) and chlorine-bromine coefficients (values vary from 105 to 254.6 with an average of 177.2) in groundwater in combination with the analysis of paleogeographic and tectonic allowed classifying waters as sedimentogenic, undergone significant metamorphization. The conditions for the waters formation made it possible to classify the waters as sedimentogenic, after significant metamorphization. The study of the deposit temperature field gave grounds to assume that one of the reasons for the hydrogeochemical field contrast is the inflow of deep fluids from the basement along faults. In addition, the structure of the hydrogeochemical field was significantly influenced by its formation in the environment of a lithostatic water pumping system and by the feeding province - the Ural framing.
About the Authors
R. N. Abdrashitova
Industrial University of Tyumen
Russian Federation
Russian Federation
Rimma N. Abdrashitova, Candidate of Geology and Mineralogy, Associate Professor at the Department of Geology of Oil and Gas Fields
Tyumen
T. V. Semenova
Industrial University of Tyumen
Russian Federation
Russian Federation
Tatyana V. Semenova, Candidate of Geology and Mineralogy, Associate Professor at the Department of Geology of Oil and Gas Fields
Tyumen
M. A. Kadyrov
Industrial University of Tyumen
Russian Federation
Russian Federation
Marsel A. Kadyrov, Postgraduate at the Department of Development and Exploitation of Oil and Gas Fields
Tyumen
S. V. Vorobjeva
Industrial University of Tyumen
Russian Federation
Russian Federation
Seema V. Vorobjeva, Doctor of Engineering, Professor at the Department of Technosphere Safety
Tyumen
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Review
For citations:
Abdrashitova R.N., Semenova T.V., Kadyrov M.A., Vorobjeva S.V. Hydrogeochemical conditions of the Lower-Middle Jurassic complex, the Еm-Еgovsky oil field. Oil and Gas Studies. 2022;(2):9-18. (In Russ.) https://doi.org/10.31660/0445-0108-2022-2-9-18
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