TY - JOUR
T1 - Common-image gathers in the offset domain from reverse-time migration
AU - Zhan, Ge
AU - Zhang, Minyu
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: The authors wish to thank the Center for Subsurface Imaging and Fluid Modeling (CSIM) sponsors for their financial support. We also appreciate the anonymous reviewers who made a number of helpful suggestions that improved the quality of our manuscript.
PY - 2014/4
Y1 - 2014/4
N2 - Kirchhoff migration is flexible to output common-image gathers (CIGs) in the offset domain by imaging data with different offsets separately. These CIGs supply important information for velocity model updates and amplitude-variation-with-offset (AVO) analysis. Reverse-time migration (RTM) offers more insights into complex geology than Kirchhoff migration by accurately describing wave propagation using the two-way wave equation. But, it has difficulty to produce offset domain CIGs like Kirchhoff migration. In this paper, we develop a method for obtaining offset domain CIGs from RTM. The method first computes the RTM operator of an offset gather, followed by a dot product of the operator and the offset data to form a common-offset RTM image. The offset domain CIGs are then achieved after separately migrating data with different offsets. We generate offset domain CIGs on both the Marmousi synthetic data and 2D Gulf of Mexico real data using this approach. © 2014.
AB - Kirchhoff migration is flexible to output common-image gathers (CIGs) in the offset domain by imaging data with different offsets separately. These CIGs supply important information for velocity model updates and amplitude-variation-with-offset (AVO) analysis. Reverse-time migration (RTM) offers more insights into complex geology than Kirchhoff migration by accurately describing wave propagation using the two-way wave equation. But, it has difficulty to produce offset domain CIGs like Kirchhoff migration. In this paper, we develop a method for obtaining offset domain CIGs from RTM. The method first computes the RTM operator of an offset gather, followed by a dot product of the operator and the offset data to form a common-offset RTM image. The offset domain CIGs are then achieved after separately migrating data with different offsets. We generate offset domain CIGs on both the Marmousi synthetic data and 2D Gulf of Mexico real data using this approach. © 2014.
UR - http://hdl.handle.net/10754/563469
UR - https://linkinghub.elsevier.com/retrieve/pii/S0926985114000160
UR - http://www.scopus.com/inward/record.url?scp=84893843891&partnerID=8YFLogxK
U2 - 10.1016/j.jappgeo.2014.01.005
DO - 10.1016/j.jappgeo.2014.01.005
M3 - Article
SN - 0926-9851
VL - 103
SP - 99
EP - 103
JO - Journal of Applied Geophysics
JF - Journal of Applied Geophysics
ER -