Actually I live in Denver now. I guess I haven't updated my profile. I used to work for Devon, and I certainly know Chesapeake. Aubrey McClendon is a genius negotiator and salesman. They have some wonderful technical staff on the operations side, but the reservoir management side they lack. They bet on natural gas just like we did but went way beyond their capacity to support drilling and holding the acreage when they were buying land. When gas prices dropped, they didn't have the cash flow to support drilling, so they have been joint venturing most of their plays. They do have some really great land though. My company is also shutting in natural gas (right now about 15% of our base) and not drilling any dry gas beyond what we have to under obligations. It is going to be touch and go, but I think we will survive it. I work in a supervisor role in what is called play assessments.
Basically we look at every play in North America and look at the statistical production profiles to determine cost to extract, resource base, etc. We feed the teams in the company that do full blown looks at pricing for oil and natural gas based on rigs, pipelines, refining infrastructure, politics, growth etc. I also work along with the groups that do our A&D, cash flow projects and I also am working on a Excel version of Markowitz portfolio theory.
You asked about the Marcellus, Bakken, Barnett and maybe the Eagle Ford? Bakken is wonderful except their oil is stranded at the end of a long transportation corridor which knocks their netbacks back. It isn't as ubiquitous as everyone wants to think, but it is one of the top plays in the US. Barnett only has a small part that is feasibly economic anymore and that is what is called the "oil" window but is really more of a wet gas area in the north part of the play. This could extend big time, but it is still early.
The Eagle Ford is great in the wet gas and parts of the oil window. This one looks to be stellar as well. It takes some more technical smarts to be successful here.
The Marcellus has 4 distinct areas. The southwest wet gas section is economic at this point. Large parts though are barely break even at this point at $2/MMBTU gas.
Watch out for the Utica oil play in Ohio. This one is still early but has all indications of being great too. There are 3 or 4 others that are either emerging or on the verge of being great as well.