Angus, DA orcid.org/0000-0003-0734-7835, Fisher, QJ orcid.org/0000-0002-2881-7018, Segura, JM et al. (4 more authors) (2016) Reservoir stress path and induced seismic anisotropy: Results from linking coupled fluid-flow/geomechanical simulation with seismic modelling. Petroleum Science, 13 (4). pp. 669-684. ISSN 1672-5107
Abstract
We present a workflow linking coupled fluid-flow and geomechanical simulation with seismic modelling to predict seismic anisotropy induced by nonhydrostatic stress changes. We generate seismic models from coupled simulations to examine the relationship between reservoir geometry, stress path and seismic anisotropy. The results indicate that geometry influences the evolution of stress, which leads to stress-induced seismic anisotropy. Although stress anisotropy is high for the small reservoir, the effect of stress arching and the ability of the side-burden to support the excess load limit the overall change in effective stress and hence seismic anisotropy. For the extensive reservoir, stress anisotropy and induced seismic anisotropy are high. The extensive and elongate reservoirs experience significant compaction, where the inefficiency of the developed stress arching in the side-burden cannot support the excess load. The elongate reservoir displays significant stress asymmetry, with seismic anisotropy developing predominantly along the long-edge of the reservoir. We show that the link between stress path parameters and seismic anisotropy is complex, where the anisotropic symmetry is controlled not only by model geometry but also the nonlinear rock physics model used. Nevertheless, a workflow has been developed to model seismic anisotropy induced by non-hydrostatic stress changes, allowing field observations of anisotropy to be linked with geomechanical models.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © The Author(s) 2016. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. |
Keywords: | coupled fluid-flow/geomechanics; reservoir characterisation; seismic anisotropy; stress path |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Environment (Leeds) > School of Earth and Environment (Leeds) > Institute for Applied Geosciences (IAG) (Leeds) |
Funding Information: | Funder Grant number EPSRC EP/K021869/1 EPSRC EP/K035878/1 NERC NE/L000423/1 B.P Exploration Operating Company N/A Statoil N/A BG Group N/A Eni S.P.A N/A |
Depositing User: | Symplectic Publications |
Date Deposited: | 15 Jun 2016 11:33 |
Last Modified: | 07 Oct 2017 16:29 |
Published Version: | https://doi.org/10.1007/s12182-016-0126-1 |
Status: | Published |
Publisher: | Springer Verlag |
Identification Number: | 10.1007/s12182-016-0126-1 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:100543 |