Journal
GEOPHYSICAL JOURNAL INTERNATIONAL
Volume 212, Issue 3, Pages 1536-1545Publisher
OXFORD UNIV PRESS
DOI: 10.1093/gji/ggx467
Keywords
Waveform inversion; Computational seismology; Seismic interferometry; Surface waves and free oscillations
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Funding
- Consortium of Subsurface Imaging and Fluid Modelling (CSIM)
- KAUST by the CRG grant [OCRF-2014-CRG3-2300]
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To decrease the recording time of a 2-D seismic survey from a few days to one hour or less, we present a parsimonious surface wave interferometry method. Interferometry allows for the creation of a large number of virtual shot gathers from just two reciprocal shot gathers by crosscoherence of trace pairs. Then, the virtual surface waves can be inverted for the S-wave velocity model by wave-equation dispersion inversion (WD). Synthetic and field data tests suggest that parsimonious WD (PWD) gives S-velocity tomograms that are comparable to those obtained from a conventional survey with a shot at each receiver. The limitation of PWD is that the virtual data lose some information so that the resolution of the S-velocity tomogram can be modestly lower than that of the S-velocity tomogram inverted from a conventional survey.
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