As previously posted on this blog, Chesapeake Energy estimates that its Ohio leaseholdings could produce as much as $20 billion in revenues.   A recent newspaper article reports that Chesapeake already has five drilling rigs operating in the Utica shale, with six wells drilled (or in the process of being drilled) in Carroll County, Ohio.   Notably, at least a portion of Chesapeake's drilling operations are being completed in connection with Enervest Ltd. through a joint venture that covers approximately 313,000 acres in the Utica shale.