NAIROBI—Kenya has picked Wood Group Plc to design an estimated $2 billion oil pipeline to pump crude from fields in the north of the East African nation to an Indian Ocean port, a senior government official said on Thursday.

Kenya discovered commercial oil reserves in its Lokichar basin in 2012 and the 500-mile pipeline is expected to be built before production is due to start in 2021-2022.

Andrew Kamau, the principal secretary at the Petroleum and Mining Ministry, said the design work would take eight months.

Britain’s Tullow Oil operates the Kenyan fields, while the other investors are Canada’s Africa Oil and France’s Total. Kenyan is expected to take a stake through state-owned National Oil.