On the enhancement of low frequencies in marine seismic data

Conference paper (2016)

Authors

A.J. Berkhout External organisation

G. Blacquière Applied Geophysics and Petrophysics -

Research Group

Applied Geophysics and Petrophysics () (TU Delft)

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Published Date

2016

Language

English

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Faculty

Civil Engineering & Geosciences

Department

Geoscience and Engineering

Research Group

Applied Geophysics and Petrophysics

Abstract

Low frequencies are most important in seismic imaging. They enhance the resolution, penetrate deeper and they are indispensable in impedance estimation. In this paper a fourstep approach for enhancing the low frequencies in marine acquisition and (pre)processing is proposed: 1) positioning the sources and detectors at the optimum depth, 2) carrying out proper deghosting and 3) (pre)processing the low frequencies separately. In step 4), the missing ultra-low frequency information (trend) comes from the velocity distribution and from modern gravity gradiometry.