RESERVOIR CHARACTERIZATION AND SEISMIC EXPRESSION OF THE CLINTON INTERVAL AT A GAS STORAGE FIELD IN NORTHEASTERN OHIO

The “Clinton interval” is a term used by drillers for Silurian deposits of interbedded sandstone and shale between the Queenston Shale and Dayton Formation in northeastern Ohio. The Clinton interval has produced oil and gas for over a century, but locally has been converted to gas storage. The Clinton interval commonly exhibits compartmentalized reservoirs partly due to the discontinuous nature of sandstones resulting from deltaic deposition, but also is influenced by fractures. Seismic methods have not conventionally been considered useful for exploration here. However, it appears that variations in the Clinton interval can be detected in 2D seismic data because of the laterally varying interference of seismic wavelets associated with changes in the composition and thickness of sandstone and shale layers. In this study, the Gabor gas storage field of Dominion East Ohio near Canton, Ohio, is being stratigraphically characterized from geophysical well logs and seismically modeled to understand how variations in the Clinton are expressed in new 2D vibroseis seismic lines (provided by Precision Geophysical) across the storage field.