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Chapter from:
AAPG Memoir 71 : Reservoir Characterization-Recent Advances
Edited by Richard A. Schatzinger and John F. Jordan
Copyright 
1999 by The American Association of
Petroleum Geologists. All rights reserved.
Memoir 71, Chapter 17: Feasibility of Detecting Seismic Waves Between Wells at the
Fractured Twin Creek Reservoir, Utah-Wyoming Overthrust Belt, by Jorge O. Parra, Hughbert
A. Collier, and Burke G. Angstman, Pages 251 - 262
Chapter 17
Feasibility of Detecting Seismic Waves Between Wells at the
Fractured Twin Creek Reservoir, Utah-Wyoming Overthrust Belt
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
In this paper, we present the feasibility of using seismic measurement techniques to
map the fracture zones between 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.
