A naturally-fractured gas reservoir in the Wind River Basin, Wyoming, is the site of a Department of Energy-sponsored project to optimize seismic techniques for characterizing natural fractures (density, orientation). The target zone is the Lower Fort Union (LFU, depth 5400–10 000 ft, two-way time ∼1.3–∼2 s), a low porosity, low permeability section in which fractures are necessary for commercial gas production. Flow rates incompatible with matrix porosity and permeability are observed.
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Lynn et al. (1996) studied this question.