CO2 can be reliably stored underground:
Dec. 13, 2011 - pro.energycentral.com
Carbon dioxide (CO2) can be safely and reliably
stored underground, an Australian-led team of researchers
The team found that depleted gas fields would
be able to store globally significant amounts of
CO2 - a key strategy in tackling climate change.
The scientists are based at the Cooperative Research
Centre for Greenhouse Gas Technologies (CO2CRC)
Otway Project at Nirranda South in southwestern
"The Otway Project has confirmed that storage
in depleted gas fields can be safe and effective,
and that these structures could store globally
significant amounts of carbon dioxide," the
report's lead author, Dr Charles Jenkins of the
CSIRO, said in a statement.
"The research included the world's first
measurement of storage efficiency for CO2 storage,
lending weight to the conclusion that depleted
gas fields have enough storage capacity to make
a significant contribution to reducing global CO2
The researchers have been injecting a natural
source of carbon dioxide into a depleted natural
gas reservoir at the site since 2008.
Their work has involved a wide range of monitoring
and verification tests to see what has happened
to the CO2.
The team concluded that large-scale geological
storage can be monitored to ensure safety.
They also reported no leaking of the CO2 back
into the atmosphere.
The paper has been published in the Proceedings
of the National Academy of Sciences of the USA.