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Near-Surface Data-Driven Methods for Surface Wave and Multiple Removal, Onshore KenyaNormal access

Authors: M. Miorali, K. Mills, M. Igoe and D. McClymont
Event name: 80th EAGE Conference and Exhibition 2018
Session: Land Seismic Noise Attenuation
Publication date: 11 June 2018
DOI: 10.3997/2214-4609.201801415
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 1.95Mb )
Price: € 20

Summary:
Land surface seismic data are usually strongly affected by the presence of surface waves (ground-roll), which can completely obscure the underlying primary reflection signal. It is therefore crucial to isolate the reflection signal for both imaging and amplitude analysis needs. Complex near-surface conditions complicate ground-roll attenuation and may introduce other sources of noise such as multiples. We present an application of interferometric ground-roll removal and 3D convolutional de-multiple methods on a seismic dataset acquired onshore North Kenya, where the shallow subsurface is characterized by strong heterogeneity, caused by the presence of a fast volcanic layer and structurally complex geology. Effective removal of the unwanted surface-wave and multiple energy was achieved with minimal impact on the amplitude character of the primary reflection signal.


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