Application of 3D Diffracted Wave’s Analysis to Improve Imaging in Poor Signal/Noise Conditions
F. Alonaizi1, R. Pevzner1, K. Tertyshnikov1, A. Bona1, and B. Gurevich1
Use of seismic reflection method in geophysical exploration and monitoring is restricted to those situations where desired seismic signal could be detected despite the presence of noise. Several important applications of the method usually have intrinsically poor signal/noise ratio, such as: land seismic surveys in complex environments (e.g. complex near surface, etc.), 4D seismic (where the difference between the baseline and monitor surveys actually represents the signal) or reprocessing of legacy data.
One traditional approach for improving signal/noise is the summation or mixing the samples on seismic traces along certain travel time curves. These include such approaches as normal moveout correction followed by stacking, common-reflection-surface (CRS) stack (Mann et al. 1999), multifocusing (Landa et al. 1999), and a large variety of imaging methods based on Kirchhoff summation (Schneider 1978).
AAPG Search and Discovery Article #90188 ©GEO-2014, 11th Middle East Geosciences Conference and Exhibition, 10-12 March 2014, Manama, Bahrain