88 Seismic Imaging Figure 3.21 Density logs, band-pass filtered density logs, and elastic depth migration images (density) of geophone and hydrophone data. Note the strong and different image artifacts on the upper portion of both images (above 560 m) due to insufficient source and receiver coverage of this region. Within the reservoir area, the density image from the hydrophone data corresponds closely to the filtered log from borehole 164. Adapted from Beydoun et al. (1989). 3.3.2.5 Conclusions The diffraction tomography approach, even using only a one-shot cross-hole acoustic (hydrophone) dataset, or a multicomponent (geophone) field dataset, proved successful in producing high-resolution (≈ 3-5 m) density tomograms for the interwell region. These tomograms are in close agreement with regional geology and density borehole logs.
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