Benefits of multifocusing stack - A new method of time imaging

Evgeny Landa, Boris Gurevich, Shemer Keydar, Pinchas Trachtman

Research output: Contribution to conferencePaperpeer-review

Abstract

The multifocusing method consists in stacking seismic data with arbitrary source-receiver distribution according to a new local moveout correction. This moveout correction is based on a local spherical approximation of the reflection wave front in the vicinity of an observation surface. We demonstrate that the multifocusing method does not require any knowledge of the subsurface model and can produce an accurate zero offset section, even in cases of a complex geological structure and low signal-to-noise ratio. The estimated sets of parameters, namely the emergence angle and the wave front curvatures for normal incident and common reflection element waves, which define the local moveout correction, contain important information regarding the subsurface model and may be used for structural and lithological inversion. We illustrate an application of the multifocusing imaging to synthetic data and compare it with conventional NMO + DMO stacking, prestack time and depth migrations.

Original languageEnglish
StatePublished - 1999
Externally publishedYes
Event1999 Society of Exploration Geophysicists Annual Meeting, SEG 1999 - Houston, United States
Duration: 31 Oct 19995 Nov 1999

Conference

Conference1999 Society of Exploration Geophysicists Annual Meeting, SEG 1999
Country/TerritoryUnited States
CityHouston
Period31/10/995/11/99

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