One could then design different operators for each He extended LS migration into filtering, with the migration operator treated as a type of transform. He did have a suitable data set for his second topic, LS OfĬourse the code was cast in LS form, but he lacked a suitable data set on which to test his ideas. Slowness, and this relationship yielded as special cases previously published formulas for migration velocity analysis,ĭepth-focusing analysis, and reflection tomography.

Perturbations and perturbations in both the raypath and He derived a general relationship between traveltime

The first was migration velocity estimation. Topics with the hope that one would mature into his thesis Technology of the time, and the signal-to-noise ratio of theĪfter returning to Utah, Tamas pursued two research Well spacing was relatively great (2000 ft) for the acquisition Obtained an impressive reflection image of their objective, a Tamas developed an anisotropic migration algorithm. Kansas, in a joint project with Texaco and Conoco, and was (225 000 traces) cross-well data set at Hugoton Field in Tamas spent a summer at Amoco’s research facility in He obtained a crisp image that captured critical fractures in To a west Texas cross-well data set provided by Chevron and Tamas applied his new migration algorithm Many of these artifacts, but these mappings have their own A variant of the VSP-CDP mapįor reflection imaging has been popular because it eliminates Seismic data were often plagued by artifacts that rendered At the time, attempts to migrate cross-well While attempting to migrate reflection energy in someĬross-well and VSP data sets, Tamas decided to include constraints consistent with the acquisition geometry and geologic structure, and he chose an LS optimization formulationįor the migration. One to obtain velocity models which best fit observed traveltimes. Regularization of tomographic inversion problems that allows In his first project he implemented a dynamic damping approach to the Jerry Schuster at the University of Utah in 1992. Tamas began graduate studies in geophysics under The Eötvös Institute in Hungary as a field geophysicist on a School of Mines in 1984 and obtained the Engineer in (LS) solution to possible career choices, an approach that isĪ continuing theme in his life. Clarence Karcher AwardĪs he has sought to fuse mathematical concepts and algorithmĭevelopment with a variety of seismic data types. Mathematical analyses and skillful implementations of algorithms, he has made significant contributions to both surface seismic prospecting and borehole geophysics, and has in particularĮnhanced the profession’s understanding of migration, velocityĪnalysis, Radon transforms, and cross-well imaging.īiography Citation for the J. Clarence Karcher Award for his exceptional work on the imaging of sparse,

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