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

Jennifer Cunningham (Corresponding Author), Nestor Cardozo, Christopher Townsend, David Iacopini, Gard Ole Waerum

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5 Citations (Scopus)
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We present an integrated seismic imaging and fault interpretation workflow to characterize the seismic expression in and around an E-W trending central fault system imaged in near-angle stack seismic data of the Snøhvit Field, Barents Sea. Three E-W normal fault systems offset five Triassic-Lower Cretaceous seismic horizons across the field. Fault throw is largest at depth and decreases with shallowing. Dip distortion (DD) decreases in magnitude and extent with shallowing. Fault enhancement (FE), a filter used to detect edges, was applied on a blend of tensor, semblance and dip attributes, and allowed us to classify fault zones into four unsupervised seismic fault facies (mid-high FE). High FE facies occur at the center of the fault zones and are abundant in the highest thrown eastern part of the field. The FE facies decrease radially outwards field wide. Facies correlate with throw and dip separation gradient, which are in turn related to mechanical stratigraphy controlling fault propagation. We observe systematic seismic amplitude variations: a major amplitude drop on the fault plane, and a brightening and dimming linked to fault-related synclines and anticlines, respectively. Our workflow establishes a methodology for fault interpretation, linking fault throw, DD, seismic attributes and fault facies classification.
Original languageEnglish
Pages (from-to)165-180
Number of pages15
JournalJournal of Structural Geology
Early online date16 Oct 2018
Publication statusPublished - Jan 2019

Bibliographical note

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.


  • faults
  • dip distortion
  • seismic attributes
  • seismic amplitude
  • fault facies
  • Faults
  • Fault facies
  • Seismic attributes
  • Seismic amplitude
  • Dip distortion


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