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Modelling Resistivity Anisotropy Depth Trends in Sedimentary Basins: An Example from the Barents SeaNormal access

Authors: Y. Wang, K. Duffaut and J.I. Nordskag
Event name: 81st EAGE Conference and Exhibition 2019
Session: Poster: Interpretation Development & Case Studies
Publication date: 03 June 2019
DOI: 10.3997/2214-4609.201901071
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 791.39Kb )
Price: € 20

Summary:
We propose a workflow that utilizes a well-accepted rock physics model, i.e., the Waxman-Smits model, to predict the horizontal and vertical resistivity depth trends in sedimentary basins. Petrophysical and environmental properties of a target basin are quantified from existing wells by exploiting their lithological variations among different formations. These properties are then integrated through the Waxman-Smits model to predict the electrical resistivity of sedimentary rocks. In this abstract, we use log data from the Barents Sea wells to demonstrate the workflow and to verify its effectiveness. The modelling workflow is general, in principle it can be applied to world-wide sedimentary basins. Resistivity profiles, both horizontal and vertical, can serve as initial models or constraints in CSEM inversion schemes; the resulting resistivity anisotropy depth trends can assist in interpretation of regional background geological structures, and they are a powerful tool for feasibility studies in an exploration phase.


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