CO2 Storage Capacity Estimation and CO2-EOR Evaluation for Jacksonburg-Stringtown Oil Field, West Virginia, USA
As concerns around global warming increase, effective actions and measures may be required to limit carbon dioxide emission into atmosphere. Carbon dioxide-enhanced oil recovery (CO2-EOR) is an effective way, because it not only increases recovery from exiting oil reserves, but bridges the gap between regional-scale CO2 capture and geologic sequestration. Jacksonburg-Stringtown is an ideal candidate for CO2 sequestration coupled with EOR because of supercritical depth (>2500 ft.), minimum miscible pressure (941 psi), API gravity (46.5°) and good waterflood response, which indicates a high probability of successful CO2-EOR operations. Several important issues including storage capacity, long-term containment and oil recovery factor must be evaluated in such integrated system. To facilitate technical evaluation, a reasonable 3D geological model aids in calculating theoretical storage capacity, while a comprehensive numerical fluid model is used to evaluate long-term containment and oil recovery. Modeling scenarios include maximum allowable pressure, various maintenance pressure scenarios, and different injection rates. Depending on the proposed 3-D geological model, the best regions for coupled CCUS-EOR are located in southern portions of the field, and the estimated CO2 storage capacity for Jacksonburg-Stringtown oil field varies from 24 to 383 million metric tons.
AAPG Datapages/Search and Discovery Article #90258 © 2016 AAPG Eastern Section Meeting, Lexington, Kentucky, September 25-27, 2016