Riviera Energy Corp. has been retained to sell an operated interest in Chittim Field, Maverick County, Texas, and Pearsall Field, Frio County, Texas. Chittim Field has nine gas-producing wells, two oil-producing wells and two shut-in wells, while Pearsall Field has two oil-producing wells. The sale also includes a gas-treating plant. Net production is approximately 285,000 cubic feet of gas and 15 barrels of oil per day. For more information, contact Monty Fields, 432-686-9400.