Chesapeake Energy Corp,the Oklahoma-based firm is the No. 1 driller in Ohio.
Rig Count Interactive Map by Baker Hughes, an energy services company.
Shale Sheet Fracking, a Youngstown Vindicator blog.
The Ohio Environmental Council, a statewide eco-group based in Columbus.
Earthjustice, a national eco-group.
People's Oil and Gas Collaborative-Ohio, a grass-roots group in Northeast Ohio.
Concerned Citizens of Medina County, a grass-roots group.
No Frack Ohio, a Columbus-based grass-roots group.
Fracking: Gas Drilling's Environmental Threat by ProPublica, an online journalism site.
Pipeline, blog from Pittsburgh Post-Gazette on Marcellus shale drilling.
Allegheny Front, environmental public radio for Western Pennsylvania.
A few Utica shale notes that did not make it into the Jan. 1 story on Utica shale development in Ohio in 2012-2013:
1. Mike McCormac of the Ohio Department of Natural Resources says the state doesn’t like the Utica label that has been applied to the black-colored shale rock that is 400 million years old.
A more accurate description is the Utica-Point Pleasant Interval, where those two shales abut, with the Point Pleasant immediately below the Utica, he said.
That is where the liquids are most prevalent and that is what the drillers are seeking: a two-level rock layer that is from 87 to 350 feet thick, he said..
2. The Utica is also the only onshore oil play east of the Mississippi River.
The Marcellus shale in Pennsylvania is mostly dry natural gas.
In other states, much of the Utica shale is deeper, and that makes the shallower and more-accessible Ohio Utica shale on the fringes of the rock formation more attractive to drillers.
3. In 2012, the drilling companies have reduced the time and costs associated with drilling each Utica well.
4. Production gradually declines in wells, and the energy companies are unsure how big of a decline they will find in the Utica shale.
5. Investors are still cautious about the Utica shale. That is largely due to the fact that there is very little solid data for how productive the Ohio wells might be.
6. Companies are also adding additional wells next to existing wells.
Multiple wells can be housed on one well pad very close to other wells. The wells are routed to different areas of the underground shale in northwest-southeast alignments.