Shared Earth Models Give Model Consistency in Simulations; Application at a Shallow Carbon Dioxide Sequestration Site
Sequestering carbon dioxide with the goal to reduce greenhouse gases has been mainly been investigated and implemented for depleted oil reservoirs and deep saline aquifers where the carbon dioxide is stored under supercritical conditions. We investigate the potential to sequester carbon dioxide in relatively shallow depths of 550 m to 650 m at which it may not always be in its denser supercritical state. An extensive though mostly readily accessible dataset ranging from regional geological and topographical maps, hundreds of water wells, core observations and well logs are used to develop a 19 layer characterized shared earth model representing the storage site. Regionais stress analysis and rock properties characterization were determined. Application of the developed shared earth model is demonstrated in subsequent closed volume injection simulations which suggests that potential exists to inject up to 20.7 Mm3 in a single well and 44.7 Mm3 using multiple (9) injection wells over a 100 year injection timeframe. Critical factors affecting injection quantities in shallow formation injection such as formation pressure and fluid properties are also examined. This paper describes a methodology which can be applied in the evaluation of other potential shallow and deep sequestration sites.
I. C. Akpan et al., "Shared Earth Models Give Model Consistency in Simulations; Application at a Shallow Carbon Dioxide Sequestration Site," Proceedings of the 46th US Rock Mechanics / Geomechanics Symposium (2012, Chicago, IL), vol. 2, pp. 1099-1114, Elsevier B.V., Jun 2012.
46th US Rock Mechanics / Geomechanics Symposium (2012: Jun. 24-27, Chicago, IL)
Geosciences and Geological and Petroleum Engineering
American Rock Mechanics Association
Keywords and Phrases
Carbon dioxide sequestration; Critical factors; Data sets; Deep saline aquifers; Depleted oil reservoirs; Fluid property; Formation pressure; Injection quantity; Injection wells; Model consistency; Rock properties; Sequestering carbon; Shallow depths; Shared earth models; Single well; Storage sites; Supercritical condition; Supercritical state; Topographical maps; Volume injection; Well logs
International Standard Book Number (ISBN)
Article - Conference proceedings
© 2012 Elsevier B.V., All rights reserved.