The lease was for a term of three years from July 30, 2008. If they did drill a well in the three years, then your father would have gotten royalties if his minerals were in the spacing of that well.
Altex Energy Corporation drilled the Mean 1-8H horizontal well from a surface location in section 17. It was completed on 12/12/2008. You can find the Well Location Exception documents under Cause 3 200806620 Order 561379. (Look it up here: OAP) Put the cause number in the Case # box to get all of the pertinent documents. The spacing is 640 acres, so your father’s minerals are included.
You can find all the info on the actual well by looking it up on the OCC wellrecords site. Test Type in 1715N04E in the location box. You have to use section 17 because the surface location was in 17. If you sort the list by date and then by Well name, you can find the history of the well. 1073 is the change of operator form. Look for the next change of operator form. Equal Energy US had it from 2010 to 2019, so you need to contact them for records. You also need to contact Prairie Gas Company of Oklahoma for anything after the last sale to them. You may have some difficulty if you are not the executor of the estate. No one is drilling now, but the well is still producing at a nice rate.
In general, the decimal amount that you get is set up by the following formula,
Net acres/spacing acres x royalty x percentage of perforations in your section. In this case, you need to know the net acres, the spacing was 640 acres and the royalty was 3/16ths (.1875%). The lease says a gross acres of 80 which is the way leases are worded. However, your father may or may not have had the full 80 acres. The original deed or earlier probate documents would tell how many acres he actually had. If he had a will, then the will would need to be probated in the state of his residence and then filed additionally in OK in Lincoln County (if he did not live there).
This will get you started, buy you may need to contact an attorney to get things settled properly. The well has produced over 3BCF of gas, so significant.
You can find the last few months of production on the OK tax site. Type in Meen in the “lease name” box. Scissortail Energy LLC is the reporting company. Gross Production