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dc.contributor.authorChoi, Yun Seok
dc.contributor.authorAlkhalifah, Tariq Ali
dc.date.accessioned2015-08-04T07:23:37Z
dc.date.available2015-08-04T07:23:37Z
dc.date.issued2014
dc.identifier.citationChoi, Y., & Alkhalifah, T. (2014). Two-dimensional Unwrapped Phase Inversion with Damping and a Gaussian Filter. Proceedings 76th EAGE Conference and Exhibition 2014. doi:10.3997/2214-4609.20140702
dc.identifier.isbn9781632666949
dc.identifier.doi10.3997/2214-4609.20140702
dc.identifier.urihttp://hdl.handle.net/10754/564868
dc.description.abstractPhase wrapping is one of main causes of the local minima problem in waveform inversion. However, the unwrapping process for 2D phase maps that includes singular points (residues) is complicated and does not guarantee unique solutions. We employ an exponential damping to eliminate the residues in the 2D phase maps, which makes the 2D phase unwrapping process easy and produce a unique solution. A recursive inversion process using the damped unwrapped phase provides an opportunity to invert for smooth background updates first, and higher resolution updates later as we reduce the damping. We also apply a Gaussian filter to the gradient to mitigate the edge artifacts resulting from the narrow shape of the sensitivity kernels at high damping. Numerical examples demonstrate that our unwrapped phase inversion with damping and a Gaussian filter produces good convergent results even for a 3Hz single frequency of Marmousi dataset and with a starting model far from the true model.
dc.publisherEAGE Publications
dc.titleTwo-dimensional unwrapped phase inversion with damping and a Gaussian filter
dc.typeConference Paper
dc.contributor.departmentEarth Science and Engineering Program
dc.contributor.departmentEnvironmental Science and Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.contributor.departmentSeismic Wave Analysis Group
dc.identifier.journalProceedings 76th EAGE Conference and Exhibition 2014
dc.conference.date16 June 2014 through 19 June 2014
dc.conference.name76th European Association of Geoscientists and Engineers Conference and Exhibition 2014: Experience the Energy - Incorporating SPE EUROPEC 2014
dc.conference.locationAmsterdam
kaust.personChoi, Yun Seok
kaust.personAlkhalifah, Tariq Ali


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