Abstract
BP conducted the first field trial of ION's FireFly cableless seismic acquisition system in the Wamsutter field, Wyoming, during 2006/2007. The acquisition geometry of the survey provided exceptional azimuthal coverage for anisotropy analysis. The data is processed in the offset‐vector tile domain to facilitate extraction of P‐wave velocity anisotropy and azimuthal AVO variation data. Seismic‐derived azimuthal AVO results are consistent with the dipole‐sonic derived data. Integration of borehole measurements with the azimuthal anisotropy data is expected to have significant impact on our understanding of target reservoir rocks. Results show that the measured azimuth of the fast P‐wave velocity can be utilized to determine present‐day stress and paleo‐stress conditions. The post‐Cretaceous stratigraphic interval shows the effects of the present‐day stress condition, whereas the Cretaceous interval which includes the target Almond Formation exhibits both present‐day stress as well as paleo‐stress conditions.
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