On 30 April 1956, Shell Darcy changed its name to Shell-BP Petroleum Development Company of Nigeria Limited to reflect BP's interest.

[citation needed] In 1979, it changed its name again to Shell Petroleum Development Company of Nigeria Limited[8](SPDC) following the nationalisation of BP's interest by the government.

[citation needed] The discovery well Oloibiri −1 was spudded on 3 August 1955 and drilled vertical to a total depth of 108 feet (3660m).

[citation needed] The first appraisal well was Oloibiri-2, it was spudded on 26 June 1956 and drilled vertically to a total depth of 2932m and it encountered oil in the Agbada Formation.

[14] An appraisal well Oloibiri-17 was spudded on 9 June 1967 after 9 years of production and drilled deviated to a measured depth of 12520 feet (3816 mD) but the result was not encouraging.

[citation needed] The main objective of the Oloibiri-18 was to appraise a new section and improve the drainage of the reservoir but the well was dry with shows and so it was plugged and abandoned.

[citation needed] 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.

[17] The Oloibiri oilfield was abandoned without any improved recovery to drain some of the 21.26 million barrels (3,380,000 m3) of hydrocarbon still left on the field.