Okla. Stat. tit. 17, § 507

The order of the Commission shall define the area of the common source of supply or portion thereof to be included within the unit area. Each unit and unit area shall be limited to all or a portion of a single common source of supply. Brine owners within the unit shall share in the production of brine in the proportion that their acreage bears to total acreage within the unit, unless the Commission, after notice and hearing, shall provide for another method in the unit plan. Solution gas owners within the unit shall share in production of solution gas in the proportion that their acreage bears to total acreage in the unit, unless the Commission, after notice and hearing, shall provide for another method in the unit plan.