Implications of depth conversion on fault geometries and fault-risk assessment in the Smeaheia CO2 storage site, northern North Sea Nora Holden, Behzad Alaei, Elin Skurtveit, Alvar Braathen Geoenergy, 2024 Assessments of fault geometries and fault-risk parameters are crucial when evaluating the integrity of a structurally controlled CO 2 storage site. To perform these assessments, seismic data, recorded in time, must be converted to depth. The velocity models used for this time to depth conversion influence the final depth image and, consequently, the geometry of the interpreted faults. Against this background, we created four velocity models for depth conversion, assessed the impact on fault throw, dip and thickness of the primary seal, and, subsequently, a fault-risk assessment of the Vette Fault Zone in the Smeaheia CO 2 storage site. We found that depth conversion had a larger influence on fault throw and thickness of the primary seal than on fault dip. In contrast, the overall assessment of the presence of a membrane seal and geomechanical integrity showed less sensitivity to the depth conversion process. Consequently, we suggest that a relatively robust fault-risk assessment can be made with a variety of velocity model designs and data input. Nevertheless, we found a mean difference of 2% in the shale gouge ratio, 4% in the slip tendency and 9% in the dilation tendency for the Vette Fault Zone, emphasizing the importance of accounting for the influence of depth conversion in optimizing structural assessments in potential CO 2 storage sites.
Integrated Machine Learning Approaches for Accelerated Understanding of Sand Injectites-Fault Relationships in Exploration and CO2 Storage 85th Eage Annual Conference and Exhibition 2024, 2024
A multi-model AI workflow - integrating from rock samples to basin-scale seismic-based rock property prediction 84th Eage Annual Conference and Exhibition, 2023
The digital underground: Integrating petroleum geoscience with data science principles to create an intelligent subsurface platform Eage Subsurface Intelligence Workshop 2019, 2019
Seismic forward modelling of two fault-related folds from the Dezful Embayment of the Iranian Zagros Mountains Journal of Seismic Exploration, 2005
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Clinoform development and topset evolution in a mud‐rich delta–the Middle Triassic Kobbe Formation, Norwegian Barents Sea TG Klausen, JA Torland, CH Eide, B Alaei, S Olaussen, D Chiarella Sedimentology 65 (4), 1132-1169 , 2018 2018 Citations: 32
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An integrated procedure for migration velocity analysis in complex structures of thrust belts B Alaei Journal of Applied Geophysics 59 (2), 89-105 , 2006 2006 Citations: 24
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