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The AAPG/Datapages Combined Publications Database
AAPG Bulletin
Abstract
AAPG Bulletin, V.
Seismic
Techniques
C. R. Bates,2 H. B. Lynn,3 and M. Simon3
1Manuscript received March 23, 1998;
revised manuscript received January 18, 1999; final acceptance January
29, 1999.
2Sedimentary Systems Research Group,
University of St. Andrews, Fife, Scotland; e-mail: [email protected]
3Lynn Inc., Houston, Texas.
ABSTRACT
The upper Green River Formation at the Bluebell-Altamont
field, Utah (Figure 1) is a tight gas sand reservoir where economic production
can be sustained only in regions of high natural fracturing. In 1994, a
demonstration seismic
project was conducted at the field to show how exploration
for, and the characterization of, naturally fractured gas reservoirs can
be more effective through the integrated use of
seismic
techniques. Study
of field exposures, well logs, and regional stress indicators prior to
the
seismic
survey indicated a high degree of preferential orientation
to the dominant fracture trend at the field. The
seismic
survey consisted
of two crossing, nine-component surface
seismic
lines and a nine-component
vertical
seismic
profile. The compression, and shear-wave surface
seismic
both recorded anisotropies that were related to the presence and azimuth
of the natural fracturing. The surface
seismic
results were supported by
results from the nine-component
vertical
seismic
profile. This program
demonstrates the potential offered by the use of integrated
seismic
and
geological techniques for the analysis of both land and marine naturally
fractured reservoirs; furthermore, it demonstrates the possibilities of
reviewing existing databases containing compression-wave surface
seismic
data for fracture information.
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