Time-frequency analysis of seismic reflection data

Philippe Steeghs, Richard G. Baraniuk, Jan Erik Odegard

Research output: Chapter in Book/Report/Conference proceedingChapter

2 Scopus citations

Abstract

When seismic waves propagate through the subsurface, energy is reflected back toward the surface at acoustic impedance contrasts. The strength of this impedance contrast is called the reflectivity. The seismic cross section of Figure 8.1(b) is a representation of the (band-limited) reflectivity of the subsurface. If the seismic wave velocity is known, then the time axis can be converted to depth. In the image of Figure 8.1(b), a two-way (down and up) travel time of 1 sec corresponds roughly to a depth of 1 km below the surface. When a rapid change in acoustic impedance occurs at a certain depth, this generally implies a change in the composition of the rocks. As a result, it is possible to make an educated guess of the geologic structure of the subsurface, based on the seismic image.

Original languageEnglish (US)
Title of host publicationApplications in Time-Frequency Signal Processing
PublisherCRC Press
Pages307-338
Number of pages32
ISBN (Electronic)9781420042467
ISBN (Print)9780849300653
StatePublished - Jan 1 2002
Externally publishedYes

ASJC Scopus subject areas

  • Engineering(all)

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