From Bureau of Economic Geology, The
University of Texas at Austin (www.beg.utexas.edu).
For more information, please contact the author.
Bureau Seminar, November 18, 2011
Is mudrock tight enough for CO2 storage?
Link to streaming video: available 11.18.2011 at 8:55am
Dr. Jiemin Lu
Bureau of Economic Geology, UT Austin
CO2 emissions from the combustion of fossil fuels are thought to be a critical contributor on global warming. Carbon capture and sequestration has been identified as a potential technology to reduce CO2 emissions while permit the continued use of fossil fuels. Sequestrated CO2 would have to remain efficiently isolated from the atmosphere for at least tens of thousands of years. To ensure a safe disposal it is necessary to assess the sealing capacity of the cap rock. A natural CO2-rich oilfield in the North Sea, a DOE sponsored CO2-EOR/sequestration site in Mississippi, and Miocene siltstone/mudstone were studied to assess their sealing properties. All the mudstone units display high capacity of retaining large volume of CO2. Uncertainty of storage security remains whether focused leakage pathways exist and how fluids move through the leakage paths.