Mineral rights in Converse County WY

Hi, all --Springfield Oil has given me an offer for some mineral rights that apparently I’ve inherited from my great-grandmother. The mineral interest in question is at

Township 35 North, Range 71 West, 6th p.m.

I’ve looked at the WOGCC maps and can’t make head or tails of it. How do I find out what’s a good offer? Does anyone know whether there are wells/fracking on that land now? I appreciate any help!

Stacey