Electrical logging signals in vertical and inclined wells in intervals of anisotropic Jurassic deposits (numerical modeling)
https://doi.org/10.18303/2619-1563-2024-4-19
Abstract
Numerical inversion of borehole electrometry signals in vertical wells was performed for Middle Jurassic deposits of the central part of Western Siberia, and a priori geological information was analyzed. Typical geoelectric models of J2 reservoirs have been constructed. According to the results of joint inversion of galvanic and induction probe signals, the deposits in the reservoir interval and the host rocks are distinguished by a strong resistivity contrast. The thickness of the formations is small compared to the electric logging probes. The clayey intervals are also characterized by electrical anisotropy. Numerical modeling of electromagnetic logging signals was performed for these models. The article demonstrates the main changes in the synthesized signals with an increase in the zenith angle of inclination of the well.
Keywords
electrical logging,
vertical well,
inclined well,
Middle Jurassic deposits,
numerical inversion,
numerical modeling,
geoelectric model
Supporting agencies: The study was carried out with the financial support of Russian Federal Research Project FWZZ-2022-0026 “Innovative aspects of electrodynamics in problems of exploration and oilfield geophysics".
About the Authors
K. V. Sukhorukova
Trofimuk Institute of Petroleum Geology and Geophysics, SB RAS
Russian Federation
Russian Federation
Karina V. Sukhorukova
Koptyug Ave., 3, Novosibirsk, 630090
S. A. Primakov
Trofimuk Institute of Petroleum Geology and Geophysics, SB RAS
Russian Federation
Russian Federation
Sergey A. Primakov
Koptyug Ave., 3, Novosibirsk, 630090
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For citations:
Sukhorukova K.V., Primakov S.A. Electrical logging signals in vertical and inclined wells in intervals of anisotropic Jurassic deposits (numerical modeling). Russian Journal of Geophysical Technologies. 2024;(4):19-33. (In Russ.) https://doi.org/10.18303/2619-1563-2024-4-19
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