Modeling the effects of a dynamic rough sea surface

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

4 Citations (Scopus)

Abstract

The strong sea surface reflectivity causes source- and receiver-ghost notches: areas in the wavenumber-frequency domain where the signal is very weak and consequently the SNR (signel-to-noise ratio) is low. If the sea surface is flat, these notches are very deep, but if it is rough and dynamic, they become blurred. The same strong sea-surface reflectivity also causes the surface-related multiples and its effect increases with each next multiple order. When modeling the ghost wavefield of an impulsive source in the case of a dynamic sea surface, an effective static sea surface suffices. The latter is composed of the surface areas that are ‘touched’ by the source wavefield at successive snapshots in time. However, such an effective static sea surface is not sufficient for the case of the detector ghost: here the dynamic character of the sea surface needs to be taken into account. We introduce a method for doing this by computing ghost operators for a number of snapshots in time and compose the final result from applying these. Our modeling method can be used to test algorithms such as deghosting. It can also be used to quantify the error that is introduced when the effects of the rough and dynamic sea surface are ignored, e.g., by replacing it by a flat sea surface in combination with an effective reflectivity that aims at incorporating the effects of a rough and dynamic sea surface.
Original languageEnglish
Title of host publicationSEG Technical Program Expanded Abstracts 2018
Subtitle of host publication14-19 October 2018, Anaheim, United States
Pages3838-3842
DOIs
Publication statusPublished - 2018
EventSEG Annual Meeting 2018 - Anaheim convention Center, Anaheim, United States
Duration: 14 Oct 201819 Oct 2018
Conference number: 88
https://seg.org/Annual-Meeting-2018

Publication series

NameSEG Technical Program Expanded Abstracts 2018
PublisherSEG
ISSN (Electronic)1949-4645

Other

OtherSEG Annual Meeting 2018
Abbreviated titleSEG 2018
CountryUnited States
CityAnaheim
Period14/10/1819/10/18
Internet address

Keywords

  • marine
  • modeling
  • sources
  • signal processing
  • algorithm

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