Oregon Revised Statutes Mineral Resources § 520.220

(1) When two or more separately owned tracts are embraced within a spacing unit or when there are separately owned interests in all or a part of such spacing unit, then the interested persons may integrate their tracts or interests for the development and operation of the spacing unit.

(2) In the absence of voluntary integration, the governing board of the State Department of Geology and Mineral Industries, upon the application of any interested person, shall make an order integrating all tracts or interests in the spacing unit for the development and operation thereof and for the sharing of production therefrom. The board, as a part of the order establishing one or more spacing units, may prescribe the terms and conditions upon which the royalty interests in the units shall, in the absence of voluntary agreement, be deemed to be integrated without the necessity of a subsequent order integrating royalty interests. Each such integration order shall be upon terms and conditions that are just and reasonable.