Are Complex Velocity Models Absolutely Necessary for Microseismic Processing?
D. Pandolfi, E. Rebel-Schisselé, E. Auger and T. Bardainne
Event name: Fifth EAGE Passive Seismic Workshop
Session: Integrated Interpretation
Publication date: 28 September 2014
Info: Extended abstract, PDF ( 261.44Kb )
Price: € 20
A very accurate model, including layer complexities as well as accurate anisotropy parameters, is required to minimize location errors in processing microseismic data with an absolute technique; if velocity model approximation is significant, as in absence of detailed information, the locations would be largely biased. This work shows that by employing a relative technique, a detailed knowledge of the velocity model becomes of second order. The template, or master event, is also used to retrieve a simplified equivalent velocity model, employing which the location errors remain acceptable for events spatially close to the template.