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FWI Salt Model Update with Sparse Nodes: A Feasibility Test on OGO FAN SurveyNormal access

Authors: Y. Huang, J. Mao and J. Sheng
Event name: 81st EAGE Conference and Exhibition 2019
Session: FWI Case Studies I
Publication date: 03 June 2019
DOI: 10.3997/2214-4609.201901234
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 3.3Mb )
Price: € 20

Summary:
Sparse-node acquisitions has emerged in recent years due to the cost, efficiency requirements and embedded benefits such as ultralong offset, full-azimuth illumination and better low-frequency availability. A comprehensive full-waveform inversion (FWI) study is performed to assess the feasibility of using seismic data acquired by sparse nodes to obtain more accurate earth models. The FWI study automatically updates the suprasalt sediment, salt and subsalt, and also analyses both velocity and anisotropy. The improved subsalt images demonstrate the benefits in acquiring sparse node seismic data to improve velocity model building (VMB). Combining such VMB focused surveys with existing marine towed-seismic data could be a potential cost-effective solution for future exploration.


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