1 m
DESCRIPTION
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 PresentationTRANSCRIPT
1 m
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
Converted Waves in Anisotropic Media
P
C
Isotropic
Anisotropic
Shear wave splitsinto 2 componentsthat are orientatedin the symmetry directions of the anisotropic medium
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