2003 SEG Annual Meeting,
2003. Society of Exploration Geophysicists
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The borehole orbital vibrator source (OVS) has many unique properties that are useful for cross-well, single-well, and borehole-to-surface imaging of both P-(compressional) and S- (shear) wave velocities of reservoir rocks. In this paper, we present an analytical source model for OVS in the frequency-wavenumber domain. Using this model, the characteristics of the body waves around the borehole and borehole-guided waves generated by a variety of vibrator motions is examined. To explain large tube wave amplitudes observed during field measurements, we also examine the effect of misalignment between OVS and the borehole axis on the generation of tube waves using the analytical model.
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