Assessing CO2 geological storage in Arbuckle Group in northeast Oklahoma

Abstract

This paper examines a rigorous site characterization and analysis of geological storage capacity of CO2 in Arbuckle Group in the north part of Oklahoma to accelerate Carbon Capture and Storage (CCS) and Utilization (CCUS) technology deployment. Data obtained from the core, logs, and historic wastewater injection and production data were used to build and validate a geological model. Subsurface structure, depth required to attain supercritical CO2, rock properties and required caprock criteria were applied to Arbuckle geological model to identify suitable region for geological storage of CO2. The model estimates that the western Osage County has a storage capacity of > 50 million metric tons of CO2. More specifically, two sweet spots with a higher potential for CO2 storage were identified. The presence of several anthropogenic CO2 sources in the vicinity of site, existing pipelines, and compression infrastructure are the significant elements of a techno-economic analysis of the prospect storage project(s). This study demonstrates that the carbonate Arbuckle Group could be a strategic geological unit for CO2 sequestration, thus contributing toward emissions reduction from nearby industrial complex.