structural geology, propagation mechanics and - Stanford School of ...

conducted on well-cemented sandstones subjected to unrealistically high confining
pressures, these experiments have produced some promising results. Another set of
experiments, although originally designed to investigate borehole breakouts in sandstone,
have produced perhaps the most representative CBs yet achieved in the laboratory
(Haimson, 2003; Haimson and Lee, 2004).
9. Acknowledgements
Our thanks to John Childs (Figure 2.1) and Frantz Maerten for their able assistance in
the field, and to the Valley of Fire State Park staff and Superintendent Jim Hammons for
access, support and permission to collect samples. We also are deeply indebted to Gaurav
Chopra, Pradeep Sharma and Ole Kaven for their computational and coding work using
MATLAB®. Chopra developed the BEM code used in this paper, while Sharma
graciously provided the Eshelby code, which was modified for our use by Kaven. Tapan
Mukerji provided invaluable assistance on issues of image analysis and rock physics,
while Bob Jones enabled the SEM effort. Dave Lockner (U.S. Geological Survey), and
Bill Olsson and David Holcomb (Sandia National Laboratories) graciously allowed us to
conduct preliminary testing of our ideas in the lab, while providing many useful insights.
This work was funded under grants from the U.S. Department of Energy, Office of Basic
Energy Science, Geosciences Research Program to John Rudnicki (DE-FG02-
93ER14344), and to David Pollard and Atilla Aydin (DE-FG03-94ER14462), with
additional support from the Stanford Rock Fracture Project.
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