Marchenko Imaging of Volve Field, North Sea

Matteo Ravasi, Ivan Vasconcelos, A Kritski, Andrew Curtis, Carlos Alberto Da Costa Filho, Giovanni Meles

Research output: Contribution to conferencePaperpeer-review

Abstract / Description of output

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 ofrequirements 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
Publication statusPublished - 2015
Event77th EAGE Conference & Exhibition 2015 - Madrid, Spain
Duration: 1 Jun 20154 Jun 2015

Conference

Conference77th EAGE Conference & Exhibition 2015
Country/TerritorySpain
CityMadrid
Period1/06/154/06/15

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