Sheridan Production Partners, Houston, has formed Sheridan Production Partners LP, a $1.3-billion fund that will invest in mature assets across the U.S., including the Gulf of Mexico shelf. Sheridan chief executive is Lisa Stewart, who has co-founded the new E&P company with private-equity firm Warburg Pincus. Stewart was executive vice president for El Paso Corp. and president of El Paso Exploration & Production Co. Prior to El Paso she was executive vice president, business development and E&P services, for Apache Corp. Joining Stewart are Jim Bass, executive vice president and chief operating officer; Eric Harry, executive vice president, acquisitions, and general counsel; and Tim Blaine, chief financial officer. Bass and Harry were both previously with El Paso and Apache; Blaine was with Kerr-McGee Corp. Bass was El Paso senior vice president, Texas Gulf Coast region, and with Apache, vice president, Midcontinent; managing director, Australian operations; and vice president, exploration, Gulf of Mexico. Harry was senior vice president and general counsel at El Paso, and vice president and associate general counsel at Apache. For more on this, see the September issue of Oil and Gas Investor. For a subscription, call 713-260-6441.