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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 - PowerPoint PPT Presentation

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Valhall LoFS

• 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 - 300300m

OBC locations (red) & seafloor topography

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Converted Waves in Anisotropic Media

P

C

Isotropic

Anisotropic

Shear wave splitsinto 2 componentsthat are orientatedin the symmetry directions of the anisotropic medium

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Previous Studies at Valhall• 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

Fracture pattern for top chalk

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