TY - GEN
T1 - Analysing the effects of least-squares datuming on VSP multiple imaging
AU - Aldawood, A.
AU - Hoteit, I.
AU - Turkiyyah, G.
AU - Alkhalifah, T.
PY - 2015
Y1 - 2015
N2 - Interferometric transformations are widely applied to transform seismic data from one acquisition geometry to another. We used a correlation-type interferometric transformation to redatum verticalseismic-profiling multiples into surface-seismic virtual primaries. Conventional redatuming, based on the cross-correlation of seismic traces, yields virtual surface-seismic records that suffer from correlation artefacts, wavelet distortion, and low-temporal resolution. These effects are mainly caused by the limited recording aperture, the band-limited nature of the source wavelet, and the coarse source-receiver sampling. Least-squares migration of the virtual surface-seismic gathers can partially enhance the seismic resolution and improve the quality of the final migrated sections. However, our results demonstrate that the leastsquares datuming step remarkably helps suppress the cross-correlation artefacts, enhance the seismic resolution of the seismic events, and correctly deconvolve the source wavelet. Therefore, the obtained migrated sections suggest that least-squares datuming can be an essential processing step to apply to VSP surface-related multiples prior to imaging subsurface structures.
AB - Interferometric transformations are widely applied to transform seismic data from one acquisition geometry to another. We used a correlation-type interferometric transformation to redatum verticalseismic-profiling multiples into surface-seismic virtual primaries. Conventional redatuming, based on the cross-correlation of seismic traces, yields virtual surface-seismic records that suffer from correlation artefacts, wavelet distortion, and low-temporal resolution. These effects are mainly caused by the limited recording aperture, the band-limited nature of the source wavelet, and the coarse source-receiver sampling. Least-squares migration of the virtual surface-seismic gathers can partially enhance the seismic resolution and improve the quality of the final migrated sections. However, our results demonstrate that the leastsquares datuming step remarkably helps suppress the cross-correlation artefacts, enhance the seismic resolution of the seismic events, and correctly deconvolve the source wavelet. Therefore, the obtained migrated sections suggest that least-squares datuming can be an essential processing step to apply to VSP surface-related multiples prior to imaging subsurface structures.
UR - http://www.scopus.com/inward/record.url?scp=85028455538&partnerID=8YFLogxK
U2 - 10.3997/2214-4609.201413362
DO - 10.3997/2214-4609.201413362
M3 - Conference contribution
AN - SCOPUS:85028455538
T3 - 77th EAGE Conference and Exhibition 2015: Earth Science for Energy and Environment
SP - 4497
EP - 4501
BT - 77th EAGE Conference and Exhibition 2015
PB - European Association of Geoscientists and Engineers, EAGE
T2 - 77th EAGE Conference and Exhibition 2015: Earth Science for Energy and Environment
Y2 - 1 June 2015 through 4 June 2015
ER -