Wednesday, 28 July 2021, 7:00 a.m.–8:15 a.m., Houston, TX - George R. Brown Convention Center
Investigation of Multiple Formations in the Midcontinent for CO₂ Storage Potential Through the Acquisition and Analysis of over 700ft of Whole Core
A significant component of the current energy transition is identifying locations for storage of human-generated carbon dioxide (CO2). The US Department of Energy has sought to encourage this development through its Carbon Storage Assurance Facility Enterprise (CarbonSAFE) program. After a successful CarbonSAFE Phase I project, a Phase II project was undertaken to explore commercial-scale CO2 storage in the United States midcontinent region across the Patterson site in Kearny County, Kansas and the Sleepy Hollow site in Red Willow County, Nebraska. The Patterson 5-25 well in Kearny County, KS, was drilled, cored, and logged in early 2020 with drilling operations spanning from before and extending into the early pandemic-related lockdowns. Over 774 ft of 4-inch diameter core was collected across 17 runs that recovered Atoka, Morrow, Meramec, Osage/Kinderhook, Viola, Arbuckle, and Granite Wash/Reagan Formations, as well as the Precambrian basement granite. The core analysis was a vital part of the project to test fluid flow and mechanical properties of potential CO2 reservoirs and their associated sealing intervals. Investigation into the porosity and permeability for each formation was conducted along with a full program covering rock fabric and properties. In addition, a special core analysis program was designed to investigate mechanical properties and multi-phase fluid flow properties. Initial characterization across all formations is reviewed and will be utilized to drive subsequent detailed analysis of the various seals and reservoirs through the section. The impact of CO2 injection with the rocks and fluids is discussed in preparation for the last stage of analysis. Reviews of both new and traditional core analysis methods are explored for the application of CO2 storage and compared with normal protocols used in oil and gas exploration.