4D result enhancement with crosscorrelation-based time-lapse static correction at Ketzin, Germany
MetadataShow full item record
A method for correction of time-lapse differences (TLD) in the statics of seismic data from repeated surveys is presented. Such static differences are typically caused by changes in the near-surface velocities between the acquisition repeats and have a deteriorating impact on the time-lapse image. Trace-to-trace time shifts are determined from the pre-stack data sets using cross-correlations. These time shifts are decomposed in a surface-consistent manner, which is providing a static correction that is capable of aligning the repeat data to the baseline data. The approach is demonstrated on a 4D seismic data set from the Ketzin CO2 pilot storage site, Germany, and is compared with results of an initial processing that was based on individual refraction static corrections. It is shown that the proposed TLD static correction reduces 4D noise more effectively than refraction static corrections while being significantly less labor intensive.
Showing items related by title, author, creator and subject.
Time-lapse difference static correction using prestack crosscorrelations: 4D seismic image enhancement case from KetzinBergmann, P.; Kashubin, A.; Ivandic, M.; Lüth, S.; Juhlin, Christopher (2013)A method for static correction of time-lapse differences in reflection arrival times of time-lapse prestack seismic data is presented. These arrival-time differences are typically caused by changes in the near-surface ...
Tryggvason, A.; Schmelzbach, C.; Juhlin, Christopher (2009)We have developed a first-arrival traveltime inversion scheme that jointly solves for seismic velocities and source and receiver static-time terms. The static-time terms are included to compensate for varying time delays ...
Time-lapse processing of 2D seismic profiles with testing of static correction methods at the CO2 injection site Ketzin (Germany)Bergmann, P.; Yang, C.; Lüth, S.; Juhlin, Christopher; Cosma, C. (2011)The Ketzin project provides an experimental pilot test site for the geological storage of CO2. Seismic monitoring of the Ketzin site comprises 2D and 3D time-lapse experiments with baseline experiments in 2005. The first ...