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Reviving a Mature Basin through High-End Imaging TechnologyNormal access

Authors: K. Zhao, M. Burke, X. Li, S. Birdus, A. Artemov, J. Zhou and N. Mudge
Event name: 80th EAGE Conference and Exhibition 2018
Session: Seismic Imaging - Case Histories I
Publication date: 11 June 2018
DOI: 10.3997/2214-4609.201800659
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 16.32Mb )
Price: € 20

This paper highlights compelling imaging improvements achieved through modern high-end reprocessing in the Gippsland Basin. The area of study, largely represented by the Bass Canyon, has strong exploration potential as well as high risks. The major challenges in this region are related to geologic complexity and seismic imaging limitations, i.e.: a) extensive velocity anomalies leading to velocity uncertainties and false structural closures that increase drilling risk; b) strong noise interference and limited imaging clarity that affects AVO analysis. By integrating the modern techniques of 3D deghosting, full waveform inversion (FWI) and least-square Q pre-stack depth migration (LSQPSDM), the newly reprocessed data yields a substantial amount of added value over legacy datasets, resulting in an improved understanding of the subsurface geology and clearer prospect mapping. This reprocessing approach demonstrates, even in basins that are considered mature, that new ideas and technology can change long-held perceptions and rejuvenate exploration interest.

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