Evaluation of trapping mechanisms in geologic CO2 sequestration: Case study of SACROC northern platform, a 35-year CO2 injection site

Carbon Sequestration Monitoring Activities

“…The evolution of brine chemistry as a function of time is presented in [6][7][8][9][10][11][12][6][7][8][9][10][11][12][13]. Each of the experiments reached approximate steady state conditions within the first 100 hours of the experiment.…”

“…Seal characteristics are frequently overlooked in the effort to identify adequate storage locations, making thorough seal analyses relatively rare (good examples include [9], [10] and [11]). The petroleum industry has carefully studied these parameters and their implications for holding large buoyant columns in the subsurface over geologically significant periods of time.…”

“…We think this may have been caused by higher pore/throat aspect ratio in Nugget that directly affects the amount of trapping through various pore-level displacement mechanisms such as snap-off and pore-body filling. [7][8][9][10][11][12][13][14][15][16][17][18][19][7][8][9][10][11][12][13][14][15][16][17][18][19][20] present the variation of per-slice trapped CO 2 saturation versus initial CO 2 saturation at the beginning of imbibition for experiments in Berea and Nugget core. The results are compared with those predicted by empirical trapping models of Land (1968) and Spiteri et al (2005).…”

Time-lapse walkaway vertical seismic profile monitoring for CO2 injection at the SACROC enhanced oil recovery field: A case study

“…It is composed of several layers of limestone and thin shale beds representing the Strawn, Canyon, and Cisco Groups of the Pennsylvanian. The Wolfcamp shale formation of the lower Permian provides a low-permeability cap rock above the Pennsylvanian Cisco and Canyon Groups in the SACROC Unit (Han et al, 2010). The limestone is mostly calcite with minor ankerite, quartz, and thin clay lenses.…”

Gas injection may have triggered earthquakes in the Cogdell oil field, Texas

“…Northern sections of the Kelly-Snyder field have been undergoing CO 2 injection to enhance recovery since 1971 (17). In 2008 some Kelly-Snyder wells were used for a monitoring and modeling case study to learn about carbon capture use and geologic storage applications (18). Finally, in the Cogdell field, injection of CO 2 to enhance recovery began in 2001 and has been ongoing with nearly constant injection volumes since 2004.…”