Petroleum engineering is a field of engineering concerned with the activities related to the production of hydrocarbons, which can be either crude oil or natural gas. Exploration and production are deemed to fall within the upstream sector of the oil and gas industry. Exploration, by earth scientists, and petroleum engineering are the oil and gas industry's two main subsurface disciplines, which focus on maximizing economic recovery of hydrocarbons from subsurface reservoirs. Petroleum geology and geophysics focus on provision of a static description of the hydrocarbon reservoir rock, while petroleum engineering focuses on estimation of the recoverable volume of this resource using a detailed understanding of the physical behavior of oil, water and gas within porous rock at very high pressure.
Projects and Development India Limited (PDIL) is an Indian central public sector undertaking under the ownership of the Ministry of Chemicals and Fertilizers, Government of India.
An oil terminal is an industrial facility for the storage of oil, petroleum and petrochemical products, and from which these products are transported to end users or other storage facilities. An oil terminal typically has a variety of above or below ground tankage; facilities for inter-tank transfer; pumping facilities; loading gantries for filling road tankers or barges; ship loading/unloading equipment at marine terminals; and pipeline connections.
Visakhapatnam Refinery, is one of the two oil refineries of HPCL in India, the other being Mumbai Refinery. This was one of the first major industries of Visakhapatnam and first oil refinery on the East Coast. After the nationalisation, HPCL has transformed itself into a mega Public Sector Undertaking and it is second largest integrated oil company in India.
National Fertilizers Limited (NFL) is an Indian central public sector undertaking and the largest government-owned-Urea fertilizer-producer in India. It is a Navratna company, with the Government of India owning a majority stake.
Essar Shipping Ltd., now Essar Shipping Ports & Logistics Limited, is an Indian shipping corporation for the global energy business. Established in 1945, Essar Shipping was formally incorporated in 2010 and is listed on the Bombay Stock Exchange. Headquartered in Mumbai, it operates as a subsidiary of the Essar Group.
The Oil and Natural Gas Corporation Limited (ONGC) is an Indian central public sector undertaking under the ownership of Ministry of Petroleum and Natural Gas, Government of India. The company is headquartered in Delhi. 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 percent of India's domestic production of crude oil and around 84 percent of natural gas. ONGC is vertically integrated across the entire oil and gas industry. In November 2010, the Government of India conferred the Maharatna status to ONGC.
Bharat Petroleum Corporation Limited (BPCL) is an Indian public sector undertaking (PSU) under the ownership of the Ministry of Petroleum and Natural Gas, Government of India. It operates three refineries in Bina, Kochi and Mumbai. BPCL is India's second-largest government-owned downstream oil producer, whose operations are overseen by the Ministry of Petroleum and Natural Gas. BPCL was ranked 309th on the Fortune list of the world's biggest PSUs in 2020, and 792nd on Forbes's "Global 2000" list in 2021.
Hindustan Petroleum Corporation Limited (HPCL) is an Indian public sector undertaking in petroleum and natural gas industry, headquartered in Mumbai, and a subsidiary of the Oil and Natural Gas Corporation (ONGC), which is owned by the Ministry of Petroleum and Natural Gas, Government of India.
The Ministry of Petroleum and Natural Gas (MOP&NG) is a ministry of the government of India responsible for the exploration, production, refining, distribution, marketing, import, export, and conservation of petroleum, natural gas, petroleum products, and liquefied natural gas in the country. The ministry is headed by the Cabinet Minister Hardeep Singh Puri. M. M. Kutty is the Secretary of the Ministry. Dharmedndra Pradhan serving as the minister from 26 May 2014 to 7 July 2021 is the longest serving minister till date.
GAIL (India) Limited is a central public sector undertaking. It has the following business segments: natural gas, liquified natural gas, liquid hydrocarbon, liquefied petroleum gas transmission, petrochemicals, city gas distribution, renewable energy including solar & wind, exploration and production, GAILTEL and electricity generation. GAIL was given the Maharatna status on the 1 February 2013 by the Indian Government, a status which 11 other Public Sector Undertakings (PSUs) have.
Mangalore Refinery and Petrochemicals Limited (MRPL), is a division of Oil and Natural Gas Corporation (ONGC) which is under the ownership of the Ministry of Petroleum and Natural Gas of the Government of India. Established in 1988, the refinery is located at Katipalla, north from the centre of Mangalore. The refinery was established after displacing five villages, namely, Bala, Kalavar, Kuthetoor, Katipalla, and Adyapadi.
Guru Gobind Singh Refinery (GGSR) is a joint venture refinery owned by HPCL-Mittal Energy Limited (HMEL), a joint venture between Hindustan Petroleum Corporation Limited (HPCL) and Mittal Energy Investment Pte Ltd, Singapore, a company owned by L N Mittal. It is located in village Phullokhari at distance of 2 Km from Raman Mandi, Bathinda, Punjab, India. It is the tenth largest refinery in India.
Nishi Vasudeva is an Indian business executive. She is a former Chairman and Managing Director (CMD) of Hindustan Petroleum Corporation Limited (HPCL), an Indian state-owned oil and gas corporation and India's fourth largest company by revenue. She is the first woman ever to head a Navratna PSU.
OSL Consulting is an independent Gas and Oil design consultancy and engineering and project management company headquartered in Kingston upon Hull, England. It also has offices in Aberdeen and Great Yarmouth. Its employees include engineers, consultants and project managers, providing services to the oil, gas and energy sectors.
Public Sector Undertakings (PSU) or Public Sector Enterprises (PSE) in India are government-owned enterprises in which 51 percent or more share capital is held by the Government of India or state governments or joint ventures between multiple Public Sector Enterprises. Depending on the level of government ownership, they can be broadly categorised as Central PSUs or State PSUs. These entities include government companies, statutory corporations, banking institutions, and departmentally run companies. PSUs are officially classified into three categories, which are Central Public Sector Enterprises (CPSE) and Public Sector Banks (PSB) owned by the central government or other CPSEs/PSBs, and State Level Public Enterprises (SLPE) owned by state governments or other SLPEs. CPSE is further classified into Strategic Sector and Non-Strategic Sector. Depending on their financial performance and progress, CPSEs are granted the status of Maharatna, Navaratna, and Miniratna.
Indian Oil Corporation Limited is an Indian oil and gas company under the ownership of the Ministry of Petroleum and Natural Gas, Government of India. Headquartered in New Delhi, it is a public sector undertaking whose operations are overseen by the Ministry of Petroleum and Natural Gas. Indian Oil is ranked 94th on the Fortune Global 500 list of the world's biggest corporations as of 2022. It is the largest government owned oil producer in the country both in terms of capacity and revenue. It has consolidated refining capacity of 80.55MMTPA which it intends to increase to 107MMTPA by 2024-25. As of 31 March 2021, Indian Oil's employee strength is 31,648, out of which 17,762 are executives and 13,876 non-executives, while 2,776 are women, comprising 8.77% of the total workforce.
The petroleum industry in India dates back to 1889 when the first oil deposits in the country were discovered near the town of Digboi in the state of Assam. The natural gas industry in India began in the 1960s with the discovery of gas fields in Assam and Maharashtra. As on 31 March 2018, India had estimated crude oil reserves of 594.49 million metric tonnes (Mt) and natural gas reserves of 1339.57 billion cubic metres of natural gas (BCM).
Barmer Refinery is an upcoming public sector refinery and petrochemical complex in the Pachpadra of Rajasthan, India. It is owned by HPCL Rajasthan Refinery Limited (HRRL), a joint venture between Hindustan Petroleum Corporation Limited and the Government of Rajasthan. This refinery will be connected with Jamnagar Refinery and Bathinda Refinery through Amritsar Jamnagar Expressway.
HPCL-Mittal Energy Limited (HMEL) is an Indian integrated refining and petrochemical company, with operations spanning crude oil refining and petrochemical manufacturing. It is a public-private partnership between fortune 500 company, Hindustan Petroleum Corporation Limited (HPCL) and Mittal Energy Investments Pte Limited (MEIL), a part of the Lakshmi N. Mittal Group. It is headquartered at Noida, Uttar Pradesh and operates the 11.3 MMTPA Guru Gobind Singh Refinery (GGSR) at Bathinda, Punjab.
₹3,104.69 crore (US$390 million) (2021) [1] 
