Defining the 3D geometry of thin shale units in the Sleipner reservoir using seismic attributes

Acknowledgments The seismic interpretation and image processing was carried out in the SeisLab facility at the University of Aberdeen (sponsored by BG BP and Chevron). Seismic imaging analysis was performed using GeoTeric (ffA), and analysis of seismic amplitudes was performed in Petrel 2015 (Schlumberger). We would like to thank the NDDC (RG11766-10) for funding this research and Statoil for the release of the Sleipner field seismic dataset utilized in this research paper and also Anne-Kari Furre and her colleagues for their assistance. We also thank the editor, Alejandro Escalona and the two anonymous reviewers for their constructive and in depth comments that improved the paper.Peer reviewedPostprin

Investigating the PS seismic imaging of faults using seismic modelling and data from the Snøhvit field, Barents Sea

PS seismic data from the Snøhvit field are compared with seismic modelling to understand the effect of azimuthal separation and incidence angle on the imaging of faults and associated horizon discontinuities. In addition, the frequency content of seismic waves backscattered from faults is analysed. The study area consists of a horst structure delimited by a northern fault dipping NW and oblique to the E-W survey orientation, and a southern fault dipping SSW and subparallel to the survey. Due to the raypath asymmetry of PS reflections, the northern fault is imaged better by azimuthally partitioned W data that include receivers downdip of the fault, relative to the sources, than by E data where the receivers are updip from the sources. Partial stack data show a systematic increase in the PS fault-reflected amplitude and therefore quality of fault imaging with increasing incidence angle. Fault images are dominated by internal low-medium frequency shadows surrounded by medium- high frequencies haloes. Synthetic experiments suggest that this is due to the interaction of specular waves and diffractions, and the spectral contribution from the fault signal, which increases with fault zone complexity. These results highlight the impact of survey geometry and processing workflows on fault imaging.acceptedVersio

Seismic and structural characterization of fluid escape pipes using 3D and partial stack seismic from the Loyal field (UK) : A multiphase and repeated intrusive mechanism

Acknowledgements We thank an anonymous reviewer for the several constructive comments. The seismic interpretation and image processing was carried out in the SeisLab facility at the University of Aberdeen (sponsored by BG BP and Chevron). Seismic imaging analysis was performed using GeoTeric® (ffA), and analysis of seismic amplitudes was performed in Petrel® 2016 (Schlumberger). We would like to thank the Tuscany PhD Regional program and the Erasmus+exchange for funding the Aberdeen permanence of one of us (D.M.). Gazprom for supporting A.J PhD., BP for the release of the Loyal field seismic dataset utilized in this research paper and also N.Vanden Beukel (BP) and M. Gorling (BP) and his colleagues for their assistance.Peer reviewedPostprin

Fault deformation, seismic amplitude and unsupervised fault facies analysis : Snøhvit Field, Barents Sea

The authors would like to thank the Norwegian Ministry of Education and Research for funding this research. Equinor ASA and their partners in the Snøhvit Field, Petoro AS, Total E&P Norge AS, Neptune Energy Norge AS and Dea Norge AS provided the seismic data for this work. We would also like to thank Schlumberger (Petrel), Geoteric (Geoteric) and Badley's (T7) for providing us with academic licenses of their softwares, and for their support.Peer reviewedPostprin

Applying Theory of Change to strategy articulation cycles in design projects: Potentials and shortcomings through the Designscapes case study

Since the 1990s, the framework of Theory of Change has been used to address complex contexts of intervention especially in relation to planning and evaluating social practice. Theory of Change can be defined as the systematic and cumulative study of the links between the activities, outcomes, and context of an intervention. The aim of this paper is to explore through a case study whether Theory of Change can support more strategic approaches in design. In particular, the paper examines how Theory of Change was applied to DESIGNSCAPES - a project oriented, among other things, toward offering a supporting service for all those city actors interested in using design to develop urban innovation initiatives that tackle complex issues of broad concern

Seismic imaging of complex geometry : Forward modeling of sandstone intrusions

We acknowledge the support of sponsoring companies of Phase 3 of the Sand Injection Research Group (SIRG). The Norwegian Petroleum Directorate (NPD) are thanked for providing seismic data from Volund oil field. Also, we wish to acknowledge NORSAR Innovation AS for providing the academic licence for the SeisRoX software and the California Bureau of Land Management for facilitating access to the outcrop area.Peer reviewedPostprin

Active faulting controls bedform development on a deep-water fan

Tectonically controlled topography influences deep-water sedimentary systems. Using 3-D seismic reflection data from the Levant Basin, eastern Mediterranean Sea, we investigate the spatial and temporal evolution of bedforms on a deep-water fan cut by an active normal fault. In the footwall, the fan comprises cyclic steps and antidunes along its axial and external portions, respectively, which we interpret to result from the spatial variation in flow velocity due to the loss of confinement at the canyon mouth. Conversely, in the hanging wall, the seafloor is nearly featureless at seismic scale. Numerical modeling of turbidity currents shows that the fault triggers a hydraulic jump that suppresses the flow velocity downstream, which thus explains the lack of visible bedforms basinward. This study shows that the topography generated by active normal faulting controls the downslope evolution of turbidity currents and the associated bedforms and that seafloor geomorphology can be used to evince syn-tectonic deposition

Impact of the East African Rift System on the routing of the deep‐water drainage network offshore Tanzania, western Indian Ocean

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Recognition and analysis of seismic facies in the rift successions of the Campos and Santos Basins

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