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1 m. Valhall LoFS . OBC locations (red) & seafloor topography. LoFS = Life of Field Seismic Permanent installation of 120km of multi-component Ocean Bottom Cables (OBC) Surveys repeated at 3 month intervals Surveys 1,2 & 3 available for this project

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  1. 1 m

  2. Valhall LoFS OBC locations (red) & seafloor topography • LoFS = Life of Field Seismic • Permanent installation of 120km of multi-component Ocean Bottom Cables (OBC) • Surveys repeated at 3 month intervals • Surveys 1,2 & 3 available for this project • Decimated receiver spacing - 300300m

  3. Converted Waves in Anisotropic Media Anisotropic C Shear wave splits into 2 components that are orientated in the symmetry directions of the anisotropic medium P Isotropic

  4. Previous Studies at Valhall Fracture pattern for top chalk • Hall & Kendall (2003) • Subset of P-wave data analysed • Amplitude Variation with Offset and Azimuth AVOA • Inverted for fracture orientation & magnitude of anisotropy • Fracture pattern in chalk found to correlate with large-scale faulting

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