Acoustic log simulation in a viscoelastic formation Cole-Cole model

作者：Markova I^*; Sadovnychiy S; Markov M

来源：Journal of Applied Geophysics, 2011, 74(4): 294-301.

DOI：10.1016/j.jappgeo.2011.06.018

• Acoustic log
• Multipole source
• Viscoelastic medium
• Cole-Cole model

It is known that sedimentary rocks demonstrate velocity dispersion in the acoustic log frequency range. In this paper we have calculated the waveforms of sonic log for a borehole located in a viscoelastic medium. The acoustic field in the borehole has been obtained for acoustic multipole sources. To describe the viscoelastic properties of a rock we used the Cole-Cole model. This model describes the dispersion of acoustic wave velocities and quality factors in a wide frequency range. To solve the acoustic log direct problem we have applied the double integral Fourier transform (RAI method). The results obtained have shown the feasibility of S-wave velocity dispersion estimation from acoustic dipole waveform processing.

• 出版日期2011-8