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Abstract
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Chapter from:
Edited by Wells
at the
Fractured Twin Creek Reservoir, Utah-Wyoming Overthrust Belt
Chapter 17


Jorge O. Parra
Southwest Research Institute
San Antonio, Texas, U.S.A.
Hughbert A. Collier
Tarleton State University
Stephenville, Texas, U.S.A.
Burke G. Angstman
HS Resources
Denver, Colorado, U.S.A.
ABSTRACT
wells
spaced 800 m apart at a depth of 3000 m. The
wells
are in the fractured Twin Creek reservoir in the Utah-Wyoming Overthrust Belt. In
particular, we want to demonstrate that fracture zones cannot be resolved by surface
seismic measurements alone. Instead, it is more appropriate to use high-resolution
crosswell seismic data. Surface seismic data244 integrated with well logs from the
Lodgepole
field
are used to delineate the members of the Twin Creek carbonate reservoir.
Petrophysical
analysis
provides the rock physical properties and thickness of the Leeds
Creek, Watton Canyon, Boundary Ridge, and Rich members of the Twin Creek Formation.
Surface seismic and horizontal well information delineates a fracture zone in the Watton
Canyon Member. The result is a 12-layer model describing the fracture zone, with
petrophysical
parameters for each geological unit in the reservoir. We pre-sent the
feasibility of transmitting seismic waves between two
wells
in the Twin Creek reservoir at
a distance up to 800 m using synthetic interwell seismic data. We also show the geology,
petrophysics, and migrated seismic data, which are used to describe the fractured zone, as
well as the members used to produce the model for planning interwell seismic measurements.
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