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Modeling Natural Fracture Networks in the Context of Flow
Simulations: Teapot Dome, Wy
Thomas H. Wilson, Department of Geology and Geography, West Virginia University, Morgantown, WV 26506
Many naturally occurring hydrocarbon reservoirs have very small matrix porosity and permeability
making reserves difficult to extract . In many of these reservoirs, production is made possible through
the presence of naturally occurring fracture systems. Oil production from the Tensleep Formation in
the subsurface of the Teapot Dome in north central Wyoming is controlled by a natural fracture
network. However, considerable oil remains trapped in the reservoir matrix. The objectives of this
study are to gain a detailed understanding of the fracture network controlling production from the
Tensleep reservoir and to conduct flow simulations that will help design approaches to extract
remaining reserves from the reservoir matrix. We’ve completed characterization of the reservoir
fracture network and bounding formations and are in the process of developing layered models for use
in reservoir flow simulations. The ultimate outgrowth of this research effort is to develop a model
reservoir fracture network consistent with the well bore observations that also accurately models oil
production history from the Tensleep reservoir. The results of the study can then be incorporated into
future enhanced oil recovery operations and carbon storage efforts at Teapot Dome as well as in other
analogous reservoir settings.
Seismic time slice
showing major
faults within the
field
Local model of fracture
network in the A
Sandstone
Field Scale Fracture
realization