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type     January, 2009

Case studies of the application of the Certification Framework to two geologic carbon sequestration sites

Curtis M. Oldenburg, Jean-Philippe Nicot, and Steven L. Bryant

We have developed a certification framework (CF) for certifying that the risks of geologic carbon sequestration (GCS) sites are below agreed-upon thresholds. The CF is based on effective trapping of CO2, the proposed concept that takes into account both the probability and impact of CO2 leakage. The CF uses probability estimates of the intersection of conductive faults and wells with the CO2 plume along with modeled fluxes or concentrations of CO2 as proxies for impacts to compartments (such as potable groundwater) to calculate CO2 leakage risk. In order to test and refine the approach, we applied the CF to (1) a hypothetical large-scale GCS project in the Texas Gulf Coast, and (2) WESTCARB’s Phase III GCS pilot in the southern San Joaquin Valley, California.

© 2008 Elsevier Ltd. All rights reserved.

Keywords: Geologic carbon sequestration; Risk assessment; Leakage risk; Well leakage; Case studies.

Source: Greenhouse Gas Control Technologies (GHGT) conference, 16-20 November 2008

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