ProAZ maps fractures and predicts stress by observing azimuthal variations in the P-wave seismic data. Prestack azimuthally processed seismic data are analyzed in terms of time and amplitude azimuthal variations attributed to anisotropic effects.
ProAZ provides a series of tools to enable interpreters to interactively explore for azimuthal variations in their datasets and generate azimuthal attributes to summarize the results.
Benefits of Using ProAZ include:
The conditioning of azimuthal data is as critical for accurate results as gather conditioning for standard AVO work. Starting from angle or offset gathers, the super gathering of azimuthal data can be done in two different ways:
The azimuthal AVO analysis tool allows users to interactively analyze and observe amplitude data as a function of azimuth, offset, or both offset and azimuth on a single gather.
When the azimuthal gathers are properly conditioned and the amplitudes are robust, ProAZ has the ability to create and extract several different azimuthal AVO attributes that can be used to detect and visualize anisotropy.
Two different approaches have been implemented:
Both approaches produce magnitude and azimuth attributes. The magnitude attributes contain information about fracture intensity while the azimuth attributes contain information about the fracture strike. The Bani and Фiso can be combined in the visualization tool (View3D) for a display of fracture intensity and primary direction of fracturing. These values can also be combined with attribute slices displayed in 3D to show regional trends between attributes and fracturing.
* With special thanks to the CSEG Recorder Magazine. Authors: Jon Fernando (CSEG RECORDER Chief Editor 2013), Lee Hunt, Jon Downton, Ron Larson (CSEG President 2013).This paper was recognized as CSEG Best RECORDER Paper in 2011.
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