Subtask 2.17 - CO2 Storage Efficiency in Deep Saline Formations
- Univ. of North Dakota, Grand Forks, ND (United States)
As the field of carbon capture and storage (CCS) continues to advance, and large-scale implementation of geologic carbon dioxide (CO2) storage progresses, it will be important to understand the potential of geologic formations to store meaningful amounts of CO2. Geologic CO2 storage in deep saline formations (DSFs) has been suggested as one of the best potential methods for reducing anthropogenic CO2 emission to the atmosphere, and as such, updated storage resource estimation methods will continue to be an important component for the widespread deployment of CCS around the world. While there have been several methodologies suggested in the literature, most of these methods are based on a volumetric calculation of the pore volume of the DSF multiplied by a storage efficiency term and do not consider the effect of site-specific dynamic factors such as injection rate, injection pattern, timing of injection, pressure interference between injection locations, and overall formation pressure buildup. These volumetric methods may be excellent for comparing the potential between particular formations or basins, but they have not been validated through real-world experience or full-formation injection simulations. Several studies have also suggested that the dynamic components of geologic storage may play the most important role in storing CO2 in DSFs but until now have not directly compared CO2 storage resource estimates made with volumetric methodologies to estimates made using dynamic CO2 storage methodologies. In this study, two DSFs, in geographically separate areas with geologically diverse properties, were evaluated with both volumetric and dynamic CO2 storage resource estimation methodologies to compare the results and determine the applicability of both approaches. In the end, it was determined that the dynamic CO2 storage resource potential is timedependent and it asymptotically approaches the volumetric CO2 storage resource potential over very long periods of time in the two systems that were evaluated. These results indicate that the volumetric assessments can be used as long as the appropriate storage efficiency terms are used and it is understood that it will take many wells over very long periods of time to fully realize the storage potential of a target formation. This subtask was funded through the Energy & Environmental Research Center (EERC)– U.S. Department of Energy (DOE) Joint Program on Research and Development for Fossil Energy-Related Resources Cooperative Agreement No. DE-FC26-08NT43291. Nonfederal funding was provided by the IEA Greenhouse Gas R&D Programme.
- Research Organization:
- Univ. of North Dakota, Grand Forks, ND (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- FC26-08NT43291
- OSTI ID:
- 1127158
- Country of Publication:
- United States
- Language:
- English
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