Oil is produced from the Manderson Field, in Big Horn County, Wyoming, from a fracture system with possible significant lateral connectivity. So characterizing the fractures in this field is of great importance. Amplitude Versus Offset (AVO) analysis of azimuthally restricted seismic data is used to determine the orientation and density of fractures at selected locations corresponding to well locations in the Manderson field. The result of this analysis is compared to fracture strike analysis from oriented cores for three wells.

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