The next two figures present an analysis of field data from the Wind River Project, a mid-1990s study of a naturally fractured gas reservoir. Figure 14 depicts one NS dip line extracted from two 3D limited-azimuth volumes. The data are post DMO-stack-migration. The EW raypaths stack and the NS raypaths stack are shown. There is a fault block in which the EW raypaths are attenuated and the NS raypaths are not. This one fault block is interpreted to have NS gas-filled fractures. The CMP gathers were checked for proper NMO in each case. The EW gathers showed flat NMO but...

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