You probably do not own the minerals
Texas separates the surface estate from the mineral estate more thoroughly than almost any state, and severance is the norm rather than the exception on rural ground. The mineral estate is also the dominant estate, which means a mineral owner or their lessee has an implied right to use as much of the surface as is reasonably necessary to get to what is underneath. For a seller this cuts two ways: you may not have minerals to sell, and a buyer will discount for the possibility that someone else can put a pad site on the parcel. Title work resolves it, and it is worth knowing before you price the land rather than after.