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Erschienen in:
2020 | OriginalPaper | Buchkapitel
2. Wave Propagation in an Open Borehole
verfasst von : Hua Wang, M. Nafi Toksöz, Michael C. Fehler
Erschienen in: Borehole Acoustic Logging – Theory and Methods
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Abstract
This chapter covers theoretical/numerical modeling of wave propagation in an open (uncased) borehole. It starts with the analytical formulation of seismic wave propagation and proceeds to modeling for boreholes in formations with different velocities and for different source types (monopole, dipole, and quadrupole). Numerical calculations provide an extensive suite of examples that illustrate the sensitivity of the acoustic logs to formation properties, borehole radii, and type and frequency of the sources. Field data examples are also included to illustrate the waveforms in different formations.