First oil has flowed from the Tweneboa, Enyenra, Ntomme (TEN) fields offshore Ghana to the FPSO Prof. John Evans Atta Mills, according to Tullow Oil.

Oil production is expected to gradually increase toward 80,000 barrels per day (bbl/d), the FPSO capacity, Tullow said in a news release. The annual average production will be about 23,000 bbl/d gross (11,000 bbl/d net for Tullow).

The feat, which the operator said was accomplished on time and within budget, happened about three years after Ghanaian authorities approved the development plan.

Tullow holds a 47.175% stake in the fields. Partners are Anadarko Petroleum Corp., 17%; Kosmos Energy, 17%; Ghana National Petroleum Corp., 15%; and PetroSA, 3.875%.