Marchenko imaging of Volve field, North Sea

M. Ravasi, I. Vasconcelos, A. Kritski, A. Curtis, C. A. Da Costa Filho, G. A. Meles

Research output: Chapter in Book/Report/Conference proceedingConference contribution

8 Scopus citations

Abstract

Marchenko redatuming estimates the full response (including internal multiples) from a virtual source inside of an medium, using only reflection measurements at the Earth's surface and a smooth estimate of the velocity model. As such, it forms a new way to obtain full field propagators to form images of target zones in the subsurface by means of Marchenko imaging, without necessarily have to create detailed models of overburden structure. One of the main obstacles to the application of such novel techniques to field datasets is the set of requirements of the reflection response: it should be wideband, acquired with wide aperture, densely sampled arrays of co-located sources and receivers, and should have undergone removal of direct waves, source and receiver ghosts and free-surface multiples. We use a wave-equation approach to jointly redatum, demultiple, and source designature to transform data recorded using ocean-bottom acquisition systems into a suitable proxy of the reflection response required by the Marchenko scheme. We briefly review the Marchenko redatuming scheme, and present the first encouraging field results of 2D target-oriented imaging of an ocean-bottom cable dataset, acquired over the Volve field. We further discuss the 'challenge of convergence' of the Marchenko redatuming scheme for real data.
Original languageEnglish (US)
Title of host publication77th EAGE Conference and Exhibition 2015: Earth Science for Energy and Environment
PublisherEuropean Association of Geoscientists and Engineers, EAGEeage@eage.org
Pages2026-2030
Number of pages5
ISBN (Print)9781510806627
DOIs
StatePublished - Jan 1 2015
Externally publishedYes

Bibliographical note

Generated from Scopus record by KAUST IRTS on 2022-09-13

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