About Oil and Natural Gas Oil and Natural Gas Corp Ltd (ONGC) is an integrated energy company operating along the hydrocarbon value chain. The company discovers, produces, refines, and markets oil and gas, and also manufactures petrochemicals. ONGC also carries out power generation and has considerable renewable energy operations. It carries out refining operations through Mangalore Refinery and Petrochemicals Ltd and Hindustan Petroleum Corporation Ltd. It sells products to oil refining and gas marketing companies. In addition to this, the company conducts overseas operations through its subsidiary, ONGC Videsh Ltd (OVL). It has operations in Latin America, the Middle East and Africa, Asia-Pacific and Europe. ONGC is headquartered in New Delhi, India.