There are some great programs with a focus on the Oil and Gas sector, a few located in Texas.
University of Texas at Austin McCombs School of Business: McCombs' energy finance concentration, administered by the Center for Energy Finance Education and Research, is the only one of its kind.
The Jesse H. Jones Graduate School of Management at Rice University.
Both these schools have a good record of placement into large oil firms within the U.S, not sure how much it will translate overseas though.