How non-hyperbolic MultiFocusing improves depth imaging

Alex Berkovitch, Kostya Deev, Evgeny Landa

Research output: Contribution to journalArticlepeer-review

Abstract

MultiFocusing technology can dramatically improve the quality of seismic imaging especially in cases of low fold data, poor signal-to-noise ratio and sparse 3D acquisition. MF technology, based on multiparameter analysis of the wavefield and summation along predicted time surfaces, has been applied to enhance time imaging sections by dramatically increasing the fold of coherent summation of seismic signals. One of the main limitations of the zero-offset MF method is a quasi-hyperbolic approximation for actual travel-time surfaces. COMF traveltime formulas provide an adequate representation of arrival times for arbitrary offset and source-receiver configuration. The COMF correction formula is remarkably accurate even for strong curved reflectors. The correlation procedure is repeated for each imaging point, for each offset and for each time sample. It is important to note that the described procedure can be applied locally within a small vicinity of each seismic trace and does not require global full offset approximation.

Original languageEnglish
Pages (from-to)103-111
Number of pages9
JournalFirst Break
Volume29
Issue number9
StatePublished - Sep 2011
Externally publishedYes

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