Abstract
The ambient noise Scholte and Love wave phase velocity tomography is used to image a few to hundreds of meters of the subsurface at the Valhall Oil Field. Noise is recorded by 4D multi-component ocean bottom cables from the Valhall life of field seismic (LoFS) network. Six and a half hours of continuous recordings are cross correlated between all possible pairs of receivers. The vertical-vertical (ZZ) component cross-correlations (CC) are used to extract the Scholte waves and the transverse-transverse (TT) CC are used to extract the Love waves. The 2D Scholte and Love wave phase-velocity maps are constructed using the eikonal tomography method. These phase velocity maps are inverted jointly by using the neighbourhood algorithm. The local dispersion curve is inverted to get a 1D velocity profile at each point in the geographical cell and then combine them to obtain a 3D anisotropic velocity model. We find significant negative radial anisotropy (VSH < VSV) in shallow layers and positive radial anisotropy (VSH > VSV) in the deeper layers.
| Original language | English |
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| Pages | SEG-2015-5907199 |
| Number of pages | 6 |
| Publication status | Published - 2015 |
| Externally published | Yes |
| Event | 2015 SEG Annual Meeting - New Orleans, United States Duration: 18 Oct 2015 → 23 Oct 2015 |
Conference
| Conference | 2015 SEG Annual Meeting |
|---|---|
| Country/Territory | United States |
| City | New Orleans |
| Period | 18/10/15 → 23/10/15 |
Programme Area
- Programme Area 3: Energy Resources