Clayton Williams Energy, Inc. is an oil and gas company engaged in the exploration for and production of oil and natural gas. The Company operates in Texas, Louisiana and New Mexico. Its segments include oil and gas exploration and production, and contract drilling services. It has holdings in approximately two oil shale plays in the United States, which include Wolfcamp Shale in the Southern Delaware Basin of West Texas and the Eagle Ford Shale in the Giddings Area of East Central Texas. It is also engaged in finding reserves through exploratory drilling. Its exploration program consists of generating exploratory prospects, leasing the acreage related to these prospects, drilling exploratory wells on these prospects to determine if recoverable oil and gas reserves exist, drilling developmental wells on these prospects and producing and selling any resulting oil and gas production. The Company's estimated proved reserves are approximately 46,570 thousand barrels of oil equivalent.