Delta Petroleum Corporation engages in the exploration, acquisition, development, production and sale of natural gas and crude oil. The company also performs contract-drilling services throughout the United States. It operates primarily in the Rocky Mountains, Gulf Coast and offshore California areas. Delta Petroleum owns producing and nonproducing oil and gas interests, undeveloped leaseholds and related assets in 15 states. The company markets oil and gas to refineries and transmission businesses. Delta Petroleum Corporation was founded in 1984 and is based in Denver.