Oil and Natural Gas Corporation

The Oil and Natural Gas Corporation (ONGC) is an Indian central public sector undertaking under the ownership of Ministry of Petroleum and Natural Gas, Government of India. It is headquartered in Dehradun. ONGC was founded on 14 August 1956 by the Government of India.

It is the largest government-owned-oil and gas explorer and producer in the country, and produces around 70% of India's crude oil (equivalent to around 57% of the country's total demand) and around 84% of its natural gas. In November 2010, the Government of India conferred the Maharatna status to ONGC.

In a survey by the Government of India for fiscal year 2019–20, it was ranked as the largest profit making Central Public Sector Undertaking (PSU) in India. It is ranked 25th among the Top 250 Global Energy Companies by Platts.

ONGC is involved in exploring for and exploiting hydrocarbons in 26 sedimentary basins of India, and owns and operates over 11,000 kilometers of pipelines in the country. Its international subsidiary ONGC Videsh currently has projects in 15 countries. ONGC has discovered 7 out of the 8 producing Indian Basins, adding over 7.15 billion tonnes of In-place Oil & Gas volume of hydrocarbons in Indian basins.

Against a global decline of production from matured fields, ONGC has maintained production from its brownfields like Mumbai High, with the help of aggressive investments in various IOR (Improved Oil Recovery) and EOR (Enhanced Oil Recovery) schemes.

ONGC has many matured fields with a current recovery factor of 25–33%. Its Reserve Replacement Ratio for between 2005 and 2013, has been more than one. During FY 2012–13, ONGC had to share the highest ever under-recovery of ₹ 89765.78 billion (an increase of ₹ 17889.89 million over the previous financial year) towards the under-recoveries of Oil Marketing Companies (IOC, BPCL and HPCL).

On 1 November 2017, the Union Cabinet approved ONGC for acquiring majority 51.11% stake in Hindustan Petroleum Corporation Limited (HPCL). On Jan 30th 2018, Oil & Natural Gas Corporation acquired the entire 51.11% stake of HPCL.