Viscoacoustic wave-equation traveltime inversion with correct and incorrect attenuation profiles
KAUST DepartmentPhysical Sciences and Engineering (PSE) Division
Earth Science and Engineering Program
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AbstractA visco-acoustic wave-equation traveltime inversion method is presented that inverts for a shallow subsurface velocity distribution with correct and incorrect attenuation profiles. Similar to the classical wave equation traveltime inversion, this method applies the misfit functional that minimizes the first break differences between the observed and predicted data. Although, WT can partly avoid the cycle skipping problem, an initial velocity model approaches to the right or wrong velocity models under different setups of the attenuation profiles. However, with a Q model far away from the real model, the inverted tomogram is obviously different from the true velocity model while a small change of the Q model does not improve the inversion quality in a strong manner if low frequency information is not lost.
CitationYu H, Chen Y, Guo B, Schuster G (2017) Viscoacoustic wave-equation traveltime inversion with correct and incorrect attenuation profiles. SEG Technical Program Expanded Abstracts 2017. Available: http://dx.doi.org/10.1190/segam2017-17774910.1.
SponsorsWe thank the King Abdullah University of Science and Technology (KAUST) and the sponsors of the CSIM consortium for their support. We are also grateful to the high performance computing center (HPC) of KAUST for prividing access to the supercomputing facilities. We would also appreciate the support of National Natural Science Foundation of China (grants 11501302 and 61571238), and the Scientific and Technological Support Project (Society) of Jiangsu Province (grant BE2016776).
PublisherSociety of Exploration Geophysicists