Simultaneous determination of source wavelet and velocity profile using impulsive point‐source reflections from a layered fluid

K. Bube, P. Lailly, P. Sacks, F. Santosa, W. W. Symes

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

The determination of source signature is a major calibration problem in reflection seismology. This ‘deconvolution’ problem is conventionally approached by way of statistical methods, by direct measurement, or by the location of a clean reflection in an otherwise quiet part of a reflection section. We show that a quasi‐impulsive, isotropic point source may be recovered simultaneously with the velocity profile from reflection data over a layered fluid, in linear (perturbation) approximation. Our approach is completely deterministic, and does not depend on the presence of an isolated reflection in a quiet part of the section, as we illustrate with a numerical example. After describing the algorithm and a numerical implementation, we give a complete mathematical treatment, which shows that our estimates of source wavelet and velocity profile are stable in a certain sense. Because of this stability property we conjecture that our approach to simultaneous estimation of source and medium parameters actually applies to a much broader class of models than that treated here.

Original languageEnglish (US)
Pages (from-to)449-462
Number of pages14
JournalGeophysical Journal
Volume95
Issue number3
DOIs
StatePublished - Dec 1988

Keywords

  • source signature estimation
  • waveform inversion

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