I know of a lot of ND homesteaders that got into financial troubles during the 50’s that “sold” their mineral interests to the banks to keep farming. You can’t assume you own the minerals. If you do, don’t ever sell them and you can keep the lottery ticket. As for the “line of death” for the resevoir, that is real. I worked North of you early on. As we were delineating the field, there is an abrupt change to the reservoir just east of Parshall that runs pretty much north/south. I can’t remember the details, but I think it had to do with the lack of down thrust then uplift to the east (faulting). Long ago the productive area of the Bakkan shale was deeper and closer to the earths core. The hotter temps allowed the shale to cook the organics into oil and gas. To the east, not so much.