Golden Jubilee of The Indian Oil Corporation (IndianOil) 30.6.2009

Indian Oil Corporation (IndianOil) is India’s Largest Commercial Enterprise, with a net profit of ₹103.99 billion(US$1.5 billion) for the financial year 2015-16.

Standing true to its corporate vision of being ‘The Energy of India’, IndianOil has been successfully meeting the energy demands of India for more than five decades. Being India’s flagship national oil company, IndianOil with a work-force of 33,000 efficient minds is living their vision of becoming ‘a globally admired company’. It is the leading Indian Corporate in Fortune’s prestigious ‘Global 500’ listing of world’s largest corporates at 161st position for the year 2016.

IndianOil's business interests overlap the entire hydrocarbon value-chain—from refining, pipeline transportation and marketing of petroleum products to exploration & production of crude oil. And from marketing of natural gas to petrochemicals. Also, IndianOil has ventured into alternative energy and globalisation of downstream operations. With subsidiaries in Sri Lanka, Mauritius and the UAE, IndianOil is scouting for new business opportunities in the energy markets across Asia and Africa. It has also formed about 20 joint ventures with reputed business partners from India and abroad to pursue diverse business interests.

Oil and Natural Gas Corporation Limited 14.8.2006

100 Years of Digboi Refinery 18.12.2001

Digboi  is a town and a town area committee in Tinsukia district in the north-eastern part of the state of Assam, India. Crude oil was discovered here in late 19th century. Digboi is known as the Oil City of Assamwhere the first oil well in Asia was drilled. The first refinery was started here as early as 1901. Digboi has the oldest oil well in operation. With a significant number of British professionals working for Assam Oil Company until the decade following independence of India.

It is said that the town gets its name from the phrase "dig-boy-dig" which is what the English told the labourers as they dug for crude oil. The town's history begins in 1867 when a small group of men from the Assam Railway and Trading Co. found their elephants' legs soaked in black mud, that smelt somewhat like oil. The men began exploring more, and in 1889, the English started a small oil installation. India (and Asia) obtained its first refinery in Digboi in the year 1901. Assam Oil Company was formed in 1899 to look after the running of the oil business in this area. The Digboi oil field produced close to 7,000 barrels per day (1,100 m³/d) of crude oil at its peak, which was during World War II. The field was pushed to produce the maximum amount of oil with little regard to reservoir management; as a result, production started to drop almost immediately after the war. The current production from the Digboi fields is about 240 barrels per day (38 m³/d). Over 1,000 wells have been drilled at Digboi – the first well in 1889 had stuck oil at 178 feet (54 m).

In 1989, the Department of Posts, India came out with a stamp commemorating 100 years of the Digboi fields.

The Indian Petroleum industry Centenary 29.12.1989

The Indian Petroleum industry completed one hundred years in 1989 since oil in commercial quantities was discovered in Digboi, Assam, in 1889.

OIL EXPLORATION 14.8.1982

The stamp depicts the offshore jack-up drilling rig "Sagar Samrat". The first day cover shows an onshore drilling rig in the Eastern Region.

OIL EXPLORATION. Search for oil began in India a early as in 1866 in the Upper Region of Assam. It was, however, only after independence that a systematic oil exploration programme covering the entire country was taken up with earnestness. Oil was discovered at Makum near Marghrita at a depth of 36 meters as far back as in 1867 and later on at Borbhil now known as Digboi in 1890. After a considerable laps of time, the Burma Oil Company succeeded in finding oil in Naharkatiya and Moran areas in Assam in 1953 and 1957 respectively. Subsequently, the Government of India joined hands with Burma Oil Company in 1959 and formed an exploration company called 'Oil India Limited' on 50:50 partnership.

Guwahati Refinery - Inauguration 1.1.1962

This stamp and FDC were issued to commemorate the Inauguration of the Guwahati Refinery, which was set up at Noonmati in Guwahati on January 1, 1962. Guwahati Refinery is the first Public Sectorrefinery ofIndia and belongs to Indian Oil Corporation of India . The refinery was inaugurated by Late Pandit Jawaharlal Nehru, the first Prime Minister of independent India.

The refinery was built withTomanian  Collaboration and has a capacity of 1.0 million metric tonnes per annum. This refinery process crude oil from Upper Assam Oil Fields, India and helps cater energy need of the region. Major Products of this refinery are : LPG, Motor Spirit (Petrol), Aviation Turbine Fuel (ATF), Kerosene, High Speed Diesel, Light Diesel Oil and Raw Petroleum Coke.