1. Endeavor Energy Resources, Midland, Texas, USA. (corresponding author).
2. The University of Texas at Austin, Bureau of Economic Geology, Austin, Texas, USA.
3. Lawrence Livermore National Laboratory, Atmospheric, Earth, and Energy Division, Livermore, California, USA.
4. The University of Oklahoma, School of Geoscience, Norman, Oklahoma, USA.
5. Rho Earth LC, Norman, Oklahoma, USA.