Experimental Methods for Characterization of Cap Rock Properties for CO2 Storage
This paper presents laboratory methods utilized at Norwegian Geotechnical Institute for characterizing cap rock for CO2 storage reservoirs. The focus is on the physico-mechanical characterization of shale using standard rock physical-mechanical testing and some special designed set-ups for advanced experimental conditions. The Brazilian, uniaxial and triaxial tests are explained along with some examples from North Sea, Barents Sea and Svalbard. The CO2 core flood tests have been designed and carried out in the NGI laboratory for investigating rock-CO2 interaction. Monitoring techniques such as CT-scanning, acoustic measurement, acoustic emission and resistivity are used and described in the paper. Brief description of development/upgrading of laboratory instruments for conducting more advanced experiments is also included.
KeywordsAcoustic Emission Triaxial Test Triaxial Compression Brazilian Tensile Test Indirect Tensile Strength
Unable to display preview. Download preview PDF.
- Alemu, B.L., Aker, E., Soldal, M., Johnsen, Ø., Aagaard, P.: Effect of sub-core scale heterogeneities on acoustic and electrical properties of a reservoir rock: A CO2 flooding experiment of brine saturated sandstone in a CT-scanner. Geophysical Prospecting (in Press, 2012)Google Scholar
- Berre, T.: Triaxial testing of soft rocks. Geotechnical Testing Journal 34, Paper IDGTJ102879 (2010)Google Scholar
- Voltolini, M., Wenk, H.R., Mondol, N.H., Bjørlykke, K., Jahren, J.: Anisotropy of experimentally compressed kaolinite-illite-quartz mixtures. Geophysics 74, D13–D23 (2009)Google Scholar
- Cuisiat, F., Aker, E., Soldal, M., Kuehn, D.: Relating acoustic emission sources to rock failure around a borehole. In: 72nd WAGE Conf. & Exh., Barcelona, Spain, June 14-17 (2010)Google Scholar