<P> The discovery well, Oloibiri - 1 was completed on 5 June 1956 as a commercial oil production well . Thus, Oloibiri - 1 made history as the first truly commercial oil well in Nigeria . This brings the number of completed production wells on field to eleven . </P> <P> The field started oil production between late 1957 and early 1958 and the first oil production from the field came at the rate of 4,928 barrels per day (783.5 m / d). The field produced at an average rate of 5,100 barrels (810 m) of oil per day for the first year . The production increased thereafter as more wells were completed and put onto production and reached its peak in 1964 . The field was drained from eleven production wells . The oil produced from the field is sour and heavy and has an API of 20.6 . The gas produced with the oil was flared off as a result of lack of gas processing and utilisation facility in the country then, so the gas was not considered necessary . </P> <P> Royal Dutch Shell laid the first crude oil pipeline in the country from the Oloibiri field to Port Harcourt on Bonny River to access export facilities . Nigeria exported its first crude oil in February 1958 from the Oloibiri oil field, initially at the rate of 5,100 barrels per day (810 m / d). The oil was being pumped from the field via the country's first pipeline, laid by Shell . </P> <P> The Oloibiri oilfield produced over 20 million barrels (3,200,000 m) of oil during its 20 years life cycle . Oil production finally stopped in 1978 and the field was abandoned the same year . The Oloibiri oilfield was abandoned without any improved recovery to drain some of the 21.26 million barrels (3,380,000 m) of hydrocarbon still left on the field . </P>

When did nigeria export her first crude oil