Source: Dan Hawkes
Distributed acoustic sensing (DAS) is a relatively new development in
the use of fiber-optic cable for measurement of ground motion.
Discrete fiber-optic sensors have been in research and development and
field testing for more than 15 years, with geophysical applications at
least 12 years old. ESD’s Tom Daley recently led a group of researchers (including ESD’s Barry Freifeld, Jonathan Ajo-Franklin,
and Shan Dou) in a series of field tests examining the application of
this methodology to borehole and surface measurements, focusing on the
DAS data collected and the initial results from each test. Taken
together, these tests, which were all part of CO2 storage
monitoring pilots, demonstrated many potential applications of DAS
technology, as well as some current limitations in sensitivity compared
with conventional geophone recording.
To read further, go to: http://tle.geoscienceworld.org/content/32/6/699.full.pdf+html
T.M., B.M. Freifeld, J. Ajo-Franklin, S. Dou, R. Pevzner, V.
Shulakova, S. Kashikar, D.E. Miller, J. Goetz, J. Henninges, and S.
Lueth (2013), Field testing of fiber-optic distributed acoustic sensing
(DAS) for subsurface seismic monitoring. The Leading Edge, 32 (6),
Funding: FE, SECARB, GEO-SEQ, NETL, CO2 Capture Project (CCP)