COLUMBUS, OH – Findings from a test well drilled in 2007 were recently released by the Ohio Department of Natural Resources (ODNR), Division of Geological Survey. The report greatly expands the knowledge of the state’s subsurface geology and provides data that will aid in statewide efforts to reduce greenhouse gas emissions

During the summer of 2007, the Ohio Geological Survey CO2 No. 1 test well was drilled in Tuscarawas County to a total depth of nearly 8,700 feet. The well reached crystalline rocks that date back more than 600 million years ago to a geologic time known as the Precambrian Period. The objective was to evaluate the geology in the area and its capacity for storing, carbon dioxide (CO2) deep beneath the surface.

The CO2 No. 1 well resulted in two key findings. First, the subsurface geology found within this well is representative of the eastern Ohio region and has the potential for significant carbon dioxide storage into various geologic formations, or “reservoirs.” Second, above the potential reservoirs are thick, impermeable rock units known as “confining units,” that serve to seal the CO2 within the reservoirs. Results from this well also provide significant information on several prospective oil and gas-producing horizons, including the Utica Shale-Pt. Pleasant Formation, which is currently of great interest in Ohio.

The first state-funded test of this type in the country, the CO2 No. 1 well also was the first Precambrian well drilled in Tuscarawas County and provided a rare look at the deep, subsurface geology in the area.

“Multiple industries will continue to use the information from this well for decades to come, providing many benefits to all Ohioans,” said Larry Wickstrom, State Geologist and chief of the Division of Geological Survey.

A very advanced set of geophysical logs were run as part of the CO2 No. 1 well project, which are vital, advanced analyses of the rock units. Additional analyses are planned using the logs and rock materials.

Open-File Report 2011-3, Geologic assessment of the Ohio Geological Survey CO2 No. 1 well in Tuscarawas County and surrounding vicinity, is available for free download from the Division of Geological Survey website: www.OhioGeology.com. The report, appendices, and digital versions of all logs from the well also are available on DVD from the division for $50 (plus sales tax, shipping and handling). To order, contact the Geologic Records Center by phone at (614) 265-6576 or by e-mail at geo.survey@dnr.state.oh.us.

The ODNR ensures a balance between wise use and protection of our natural resources for the benefit of all. Visit the ODNR Web site at www.ohiodnr.com.

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Geologic Records Center, ODNR Geological Survey

614. 265. 6576

Jason Fallon, ODNR Office of Communications

614. 265. 6842