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Seismic Characterization of Fault Facies Models
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 79th EAGE Conference and Exhibition 2017, Jun 2017, Volume 2017, p.1 - 5
Abstract
Faults play can enhance or restrict fluid flow in reservoirs. Interpretation of seismic data is a key method for studying subsurface features, but the internal structure and properties of faults are often at the limit of seismic resolution. We present an integrated workflow to investigate the seismic response of a sandstone reservoir-scale fault zone model populated with fault facies based on deformation band distributions. We generate synthetic seismic cubes of the fault facies model for several wave frequencies and under realistic conditions of reservoir burial and seismic acquisition. The fault zone definition and the amount of details are highly dependent on wave frequency. We can use seismic attributes, such as tensor and envelope, to characterize the fault volume and its internal structure. Based on these attributes, we can subdivide the fault zone into several seismic facies from core to damage zone. Statistical analyses show a correlation between the seismic attributes and the fault internal structure, although seismic facies, due to their coarser resolution, cannot be matched to individual fault facies.