W. Va. Code § 22-21-18: Operation on drilling units.

All operations including, but not limited to, the commencement, drilling or operation of a well upon a drilling unit for which a pooling order has been entered, are hereby deemed to be operations on each separately owned tract in the drilling unit by the several owners. That portion of the production allocated to a separately owned tract included in a drilling unit is hereby deemed to be produced from that tract.