Without being able to see the language on the case, I will assume that they are trying to set the distance between the wells so that they can drill infill wells. This is commonly called “increased density” and is a way to more effectively drain the reservoir. As you can tell, that usually sets off a flurry of offers to buy. I ignore the offers and wait to see what happens, then collect my royalties which (so far) have exceeded the offers that I had received.