It's very possible Diamond put in the effort to find you and that Brigham did not, the standard of due diligence is pretty low. It's really common for me to inform people who come here for leasing help that they already have a well. If you don't have a lease within the last 20 years or a fresh statement of claim on file with your present address, I would say it's a crapshoot whether they would find you or not. I would say that the oil production of your Brigham well was better than just respectable considering that your well had over 100 days cumulative in which it did not produce and it still likely made 8 million dollars or more, probably not too far from being paid off, I think it likely that in the longest period of downtime they were installing the pump. As for a map, there are some maps you could buy that I consider pretty pricy. If you just want to visualize where your property is, you could look on the GIS server map on the NDIC Oiland Gas Division website, go to the site homepage, on the left hand side select GIS server map, when the map loads select find section from the menue on the left, input your township, range, section click on zoom to section. You have a very distinctive water lot which I think you could compare to a free county map online and find where the nearest roads and towns are, without using your credit card or getting up from your computer. I hope this helps.