Global ETD Search

1	Computation of time-lapse differences with 3D directional frames Bayreuther, Moritz, Cristall, Jamin, Herrmann, Felix J. January 2005 (has links) We present an alternative method of extracting production related differences from time-lapse seismic data sets. Our method is not based on the actual subtraction of the two data sets, risking the enhancement of noise and introduction of artifacts due to local phase rotation and slightly misaligned events. Rather, it mutes events of the monitor survey with respect to the baseline survey based on the magnitudes of coefficients in a sparse and local atomic decomposition. Our technique is demonstrated to be an effective tool for enhancing the time-lapse signal from surveys which have been cross-equalized time lapse directional frames 3D 3-D cross equalization minimization filters atomic decomposition curvelets Gaussian