If the subsurface minerals are not included in the unit, or if it is an allocation well and there will be no take-points on that subsurface where the wellbore is, then you should have an agreement and receive a payment. Sometimes the wellbore will loop backwards under an adjoining tract of land that this not in the unit and then turn back into the unit acreage. This enables the operator to get the first take-point closer to the lease line and have more horizontal takepoints for full mineral development under the unit. In this case, the operator needs the permission of the surface owner above the loop. So I am guessing here that part of your minerals are in the unit and part of the surface/minerals are not in this particular well unit.