Viscoelastic time-reversal imaging

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The time invariance of wave equations, an essential precondition for time-reversal (TR) imaging, is no longer valid when introducing attenuation. I evaluated a viscoelastic (VE) TR imaging algorithm based on a novel VE wave equation. By reversing the sign of the P- and S-wave loss operators, the VE wave equation became time invariant for the TR operation. Attenuation effects were thus compensated for during TR wave propagation. I developed the formulations of VE forward modeling and TR imaging. I tested my imaging approach in three numerical experiments. The first experiment used a 2D homogeneous model with full-aperture receivers to examine the time invariance of the VE TR imaging equation. Using the same model, the second experiment was used to demonstrate the method's ability to characterize a point source. In the third experiment, I applied this method to characterize a complex source using borehole geophones. Numerical results illustrated that the VE TR imaging improved our knowledge of the source location, radiation pattern, and amplitude.

Original languageEnglish (US)
Pages (from-to)A45-A50
JournalGeophysics
Volume80
Issue number2
DOIs
StatePublished - Mar 4 2015

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Imaging techniques
Wave equations
Invariance
wave equation
Experiments
Seismographs
Boreholes
Wave propagation
experiment
geophone
forward modeling
wave propagation
P-wave
point source
S-wave
borehole

All Science Journal Classification (ASJC) codes

  • Geochemistry and Petrology

Cite this

Zhu, Tieyuan. / Viscoelastic time-reversal imaging. In: Geophysics. 2015 ; Vol. 80, No. 2. pp. A45-A50.
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Viscoelastic time-reversal imaging. / Zhu, Tieyuan.

In: Geophysics, Vol. 80, No. 2, 04.03.2015, p. A45-A50.

Research output: Contribution to journalArticle

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