Migration Deconvolution, an Inexpensive Alternative to Least Squares Migration
Migration Deconvolution, an Inexpensive Alternative to Least Squares MigrationTuesday 7th November 2017
Social gathering starts at 5:00PM
Presentation starts at 5:30PM
Least squares migration of seismic data can significantly improve the quality of migration images. However, it can be more than an order-of-magnitude more expensive than standard migration. To overcome this expense, migration deconvolution (MD) is an inexpensive alternative, costing no more than one migration. The MD filter is applied to the poststack migration image and partly overcomes acquisition noise artifacts, balances amplitudes, deconvolves the source wavelet, and can compensate for attenuation and geometric spreading effects. We show examples of MD applied to Gulf of Mexico data and time-lapse data from Norway. In all cases, there is noticeable improvement in the migration images at a modest increase in the computational cost. We also show its effectiveness in improving the quality of elastic migration images.
Dr. Gerard Schuster is currently a Professor of Geophysics at King Abdullah University Science and Technology (KAUST) and an adjunct Professor of Geophysics at University of Utah. He was the founder and director of the Utah Tomography and Modeling/Migration consortium from 1987 to 2009, and is now the co-director and founder of the Center for Fluid Modeling and Seismic Imaging at KAUST. Dr. Schuster helped pioneer seismic interferometry and its practical applications in applied geophysics, through his active research program and through his extensive publications, including his book "Seismic Interferometry" (Cambridge Press, 2009). He also has extensive experience in developing innovative migration and inversion methods for both exploration and earthquake seismology. Gerard has an MS (1982) and a PhD (1984) from Columbia University and was a postdoctoral researcher there from 1984-1985. From 1985 to 2009 he was a professor of Geophysics at University of Utah. He left Utah to start his current position as Professor of Geophysics at KAUST in 2009. He received a number of teaching and research awards while at University of Utah. He was editor of Geophysics from 2004-2005 and was awarded SEG's Virgil Kauffman gold medal in 2010 for his work in seismic interferometry.