In case you haven’t seen it, below is a link to an earlier discussion involving purchase offers from Patch Energy in the same section you mentioned. Some of those earlier posts suggest what you will need to do in order to figure out the mineral interest your family owns and learn the amount of royalties being held in suspense. I definitely wouldn’t dismiss this, or agree to sell it, without knowing what I owned.
The Railroad Commission’s map indicates the Felix well that’s discussed in that earlier post is now operated by WPX Energy. WPX has eight two section long horizontal wells crossing that section. The interest you have in those wells or in future wells drilled there will depend on the location of your great grandfather’s interest in that section, or it’s possible he owned a partial undivided interest in the whole section.
https://www.mineralrightsforum.com/t/mineral-rights-in-receivership/65835