Shear-wave data enhance reservoir characterization

Bob A. Hardage Bureau of Economic Geology University of Texas Austin A new approach to shear-wave data acquisition should lead to expanded use of shear waves in prospect evaluation and reservoir characterization. This technology not only allows shear-wave seismic data to be acquired at low cost, but it also expands the range of earth surface conditions over which shear-wave sources can be deployed. Deep geology is illuminated by two types of seismic waves–a compressional (P) wave and a shear (S) wave. Most seismic programs record only P waves. S waves have great value, however, for detecting and estimating rock properties needed for reservoir characterization. In particular, S waves react...

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