Demonstration of super-resolution and super-stacking properties of time reversal mirrors in locating seismic sources

Weiping Cao*, Gerard T. Schuster, Ge Zhan, Sherif M. Hanafy, Chaiwoot Boonyasiriwat

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

We demonstrate with synthetic seismic data the super-resolution and super-stacking properties of time reversal mirrors (TRM). Tests on synthetic data show that TRM has the potential of exceeding the Rayleigh resolution limit by a factor of more than 9. This property is accompanied by the fact that TRM has a significant resilience to strong noise. Computer tests validate these properties by accurately imaging the source location from passive seismic data with signal-to-noise ratio of about 0.001. Results also validate that TRM enhances signal by a factor proportional to √N T/To where N is the number of records, To is the dominant period of the source wavelet, and T is the recording time of a trace. This enhancement property is denoted as super-stacking and greatly exceeds the √N enhancement predicted by stacking alone. Super-resolution and super-stacking are properties also enjoyed by seismic interferometry and reverse-time migration (RTM) with the exact velocity model.

Original languageEnglish (US)
Pages (from-to)3018-3022
Number of pages5
JournalSEG Technical Program Expanded Abstracts
Volume27
Issue number1
DOIs
StatePublished - Jan 2008
Externally publishedYes

Keywords

  • Migration
  • Passive
  • Resolution
  • Scattering
  • Wave propagation

ASJC Scopus subject areas

  • Geophysics
  • Geotechnical Engineering and Engineering Geology

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