All natural gas which has been reduced to possession and which is subsequently injected into underground storage fields, sands, reservoirs, and facilities shall at all times be deemed the property of the injector, his or her heirs, successors, or assigns. In no event shall the gas be subject to the right of the owner of the surface of the lands or the owner of any mineral interest therein under which the gas storage fields, sands, reservoirs, and facilities lie or subject to the right of any person, other than the injector, his or her heirs, successors, and assigns, to produce, take, reduce to possession, waste, or otherwise interfere with or exercise any control thereover. However, the injector, his or her heirs, successors, and assigns shall have no right to gas in any stratum, or portion thereof, which has not been condemned under the provisions of this subchapter or otherwise purchased.