Estates in oil, natural gas liquids, or natural gas, or any combination of the three, are among the several estates in real property that may be owned either separately or in conjunction with other estates. If oil, natural gas liquids, or natural gas is owned as a separate estate, either absolute, as a leasehold, or in conjunction with other estates, West Virginia property tax law requires that ownership be listed, valued, and taxed in proportion to its value to be ascertained as directed by law. If oil, natural gas liquids, or natural gas is owned in conjunction with an undivided or fee interest in an estate, the value of the oil or natural gas shall be included in the value of that estate. Oil, natural gas liquids, or natural gas may be owned without being produced. Oil, natural gas liquids, or natural gas title may exist where no oil, natural gas liquids, or natural gas is known to be present, or where the oil, natural gas liquids, or natural gas is unproducible or depleted.
W. Va. Code R. § 110-1J-2