Results of the integrated analysis of azimuthal density imager data and seismic data for well geosteering
https://doi.org/10.32454/0016-7762-2025-67-3-128-139
EDN: OSTXRS
Abstract
Background. Determination of paleocurrent directions is an important step in geological modeling. The primary objective of reconstruction consists in the textural analysis of bedding with the purpose of correlating the results with local flow direction. Bedding orientation and dip angles can be derived from density imager data.
Aim. To enhance the accuracy of oil and gas reservoir geological models and improve well placement efficiency during geosteering by implementing a methodology that integrates imager data, seismic data, and boundary mapper interpretations.
Materials and methods. The proposed algorithm incorporates density imager and boundary mapper data when carrying out geological modeling and well drilling. This algorithm includes structural interpretation of density imager data; classification of structural elements; interpretation of boundary mapper data; integrated analysis of density imager and boundary mapper results; synthesis with seismic data.
Results. The applied methodology increased effective drilling by 499 meters and successfully penetrated a fourth reservoir unit with high reservoir properties, thereby improving gas reserves characterization and volume estimation.
Conclusion. Boundary mapper data enable evaluation of the geometry of local geological bodies. Seismic data analysis is used to delineate boundaries and strike directions of geological features. However, the resolution limitations may hinder reliable stratigraphic correlation. An integrated analysis of density imager, boundary mapper, and seismic data clarifies facies trends, supporting updates to facies and geological models. Azimuthal bedding shifts during drilling may indicate transitions between geological units.
Keywords
density imager,
bedding orientation,
boundary mapper,
paleocurrents,
geosteering,
seismic facies analysis
Supporting agencies: no financial support was provided for this study
About the Author
G. V. Kazantsev
NOVATEK STC
Russian Federation
Competing Interests:
Russian Federation
Gleb V. Kazantsev — Head of the Geological Modeling Department
7, Pozharnykh i spasateley str., Tyumen 625000
Competing Interests:
the author declare no conflict of interest
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Review
For citations:
Kazantsev G.V. Results of the integrated analysis of azimuthal density imager data and seismic data for well geosteering. Proceedings of higher educational establishments. Geology and Exploration. 2025;67(3):128-139. (In Russ.) https://doi.org/10.32454/0016-7762-2025-67-3-128-139. EDN: OSTXRS
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