TY - JOUR
T1 - Integrated receiver deghosting and closed-loop surface-multiple elimination
AU - Vrolijk, Jan Willem
AU - Verschuur, Eric
AU - Lopez Angarita, G.A.
PY - 2017/7/1
Y1 - 2017/7/1
N2 - Accurate surface-related multiple removal is an important step in conventional seismic processing, and more recently, primaries and surface multiples are separated such that each of them is available for imaging algorithms. Current developments in the field of surface-multiple removal aim at estimating primaries in a large-scale inversion process. Using such a so-called closed-loop process, in each iteration primaries and surface multiples will be updated until they fit the measured data. The advantage of redefining surfacemultiple removal as a closed-loop process is that certain preprocessing steps can be included, which can lead to an improved multiple removal. In principle, the surface-related multiple elimination process requires deghosted data as input; thus, the source and receiver ghost must be removed. We have focused on the receiver ghost effect and assume that the source is towed close to the sea surface, such that the source ghost effect is well-represented by a dipole source. The receiver ghost effect is integrated within the closed-loop primary estimation process. Thus, primaries are directly estimated without the receiver ghost effect. After receiver deghosting, the upgoing wavefield is defined at zero depth, which is the surface.We have successfully validated our method on a 2D simulated data and on a 2D subset from 3D broadband field data with a slanted cable.
AB - Accurate surface-related multiple removal is an important step in conventional seismic processing, and more recently, primaries and surface multiples are separated such that each of them is available for imaging algorithms. Current developments in the field of surface-multiple removal aim at estimating primaries in a large-scale inversion process. Using such a so-called closed-loop process, in each iteration primaries and surface multiples will be updated until they fit the measured data. The advantage of redefining surfacemultiple removal as a closed-loop process is that certain preprocessing steps can be included, which can lead to an improved multiple removal. In principle, the surface-related multiple elimination process requires deghosted data as input; thus, the source and receiver ghost must be removed. We have focused on the receiver ghost effect and assume that the source is towed close to the sea surface, such that the source ghost effect is well-represented by a dipole source. The receiver ghost effect is integrated within the closed-loop primary estimation process. Thus, primaries are directly estimated without the receiver ghost effect. After receiver deghosting, the upgoing wavefield is defined at zero depth, which is the surface.We have successfully validated our method on a 2D simulated data and on a 2D subset from 3D broadband field data with a slanted cable.
UR - http://www.scopus.com/inward/record.url?scp=85017415313&partnerID=8YFLogxK
UR - http://resolver.tudelft.nl/uuid:ec367b79-bb47-4772-bc7b-82afa74e11fb
U2 - 10.1190/GEO2016-0442.1
DO - 10.1190/GEO2016-0442.1
M3 - Article
AN - SCOPUS:85017415313
SN - 0016-8033
VL - 82
SP - T133-T141
JO - Geophysics
JF - Geophysics
IS - 4
ER -