(772b) Defining CO2 Storage Options in the Upper Ohio River Valley – Advanced Characterization of Geologic Reservoirs and Caprocks Authors: Caitlin Mcneil (Presenter
The overall findings of the work show that there is significant CO2 storage potential in eastern Ohio based on porosity estimates. This is also proven by the presence of a number of high-performance injection wells in the region. The storage resource is vertically diversified into a number of geologic layers, both carbonates and sandstones, and is laterally heterogeneous. This heterogeneous nature means that advanced characterization and sustained geologic characterization using advanced tools is needed to improve confidence in storage estimates and long-term injectivity. The assessment also indicates that the primary caprock for the Cambrian-Ordovician reservoirs in the area has appropriate characteristics to retain the injected CO2. In this study, the focus of the caprock analysis was limited to assessing the sealing effectiveness and mechanical integrity of the two geologic units immediately overlying the reservoirs [i.e., immediately overlying the Knox Unconformity], the Black River Group and the Wells Creek Formation, even though there are hundreds to thousands of feet of additional low permeability limestone and shale (Trenton Formation, Point Pleasant/Utica) above these units. Thus, the caprock analysis is conservative because it doesnât take into consideration the entire caprock system.
This project has been conducted under grant agreement D-13-22 funded by Ohio Development Services Agencyâs Ohio Coal Development Office and the Midwestern Regional Carbon Sequestration Partnership (MRCSP) led by Battelle with US Department of Energy funding. The project also benefited significantly through collaboration with a number brine injection well operators, who allowed access to their wells for collection of critical geologic characterization and injection operation data. The present project complements a number of past and ongoing efforts to prove CO2 storage and utilization options in Ohio and surrounding regions.