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Riviera Energy Corp. has been retained to sell certain nonoperated properties in Texas. The package includes a 2% working interest (1.5% net revenue interest) in seven producing wells and two under completion on 10,200 gross acres in Upton County. Current production is 260 barrels of oil and 500,000 cubic feet of gas per day. The assets also include 115 development- well drilling locations. For more information, contact Jeffrey P. Longbotham, 432-686-9400.