The document summarizes India's petroleum industry. It describes how the industry started in 1890 and was primarily focused on production and exploration until the 1970s. It then expanded drastically with the introduction of the Bombay High oil field. The industry is now one of India's six core industries and plays a major role in the economy. India imports large amounts of oil and LNG and is expected to be a major contributor to growing non-OECD oil consumption. The top five oil companies globally are Saudi Aramco, Gazprom, National Iranian Oil Co., Exxon Mobil, and Petro China, with Saudi Aramco producing the most barrels per day. The Indian government has initiatives to expand domestic refining capacity