Analyzing fractures from seismic for improved drilling success
The Pinedale Anticline in Wyoming, USA, has become an area of significant interest since the recent success of several gas wells completed in its tight sandstone reservoirs. A new technique, AVAZ, that detects open natural fractures in the reservoir uses azimuthal variations in the amplitudes of seismic data, at long shot/receiver offsets, to identify fractures. A modification of this technique has been used on a portion of Veritas’ multi-client 3D survey over the Pinedale anticline to identify the presence of these fractures in the interwell region.
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