Carrizo Oil & Gas is a Texas-based energy company that is actively engaged in the exploration, development, exploitation and production of oil and natural gas, primarily in proven onshore trends along the Texas and Louisiana Gulf Coast regions. The company controls significant prospective acreage blocks and utilizes 3-D techniques to identify potential oil and gas reserves and drilling opportunities. It has other interests in East Texas and a coal bed methane investment in the Rocky Mountains. Additionally, in 2003, the company obtained licenses to explore in the United Kingdom North Sea. Carrizo Oil & Gas maintains a location in Houston.