Atlanta

Atlanta Oil Field Profile

The Atlanta oil field is located in block BS-4 of the Santos Basin, approximately 185 kilometers southeast of Rio de Janeiro, Brazil.
It is a post-salt oil field situated in ultra-deepwater, with a water depth of about 1,550 meters (or approximately 5,100 feet).

The field was discovered in 2001 and contains heavy oil with low sulfur content and a density ranging between 14º and 16º API.
The oil is non-paraffinic and non-asphaltenic.

As of December 2020, the 2P reserves of the field were estimated to be approximately 103 million barrels of oil equivalent (Mboe).
Previous estimates by Gaffney, Cline & Associates (GCA) in 2014 indicated 1P reserves of 147 million barrels, 2P reserves of 191 million barrels, and 3P reserves of 269 million barrels.
Since the start of production in May 2018, the field has produced more than 16 million barrels of oil. In 2020, the gross output was 6.281 million barrels, and in 2019, it was 6.921 million barrels.

Enauta Energia, a subsidiary of Enauta Participações, is the operator of the field and holds a 50% interest. The remaining 50% interest is held by Barra Energia.
However, there have been changes in ownership; Enauta agreed to acquire a 50% working interest in Block BS-4 from Barra Energia in December 2020, which was approved by Brazil’s National Agency for Petroleum, Natural Gas, and Biofuels (ANP) in April 2021.

Early Production System (EPS):
- The EPS phase began in the second half of 2013 with the drilling of two horizontal wells. A third well commenced production in June 2019.
- The wells are tied back to the Petrojarl I floating production, storage, and offloading (FPSO) vessel, operated by Teekay Offshore Production. The FPSO has a production capacity of approximately 30,000 barrels of oil per day (bopd), a compression capacity of about 225,500 cubic meters of gas per day, and a storage capacity of 180,000 barrels of oil.
Full Development System (FDS):
- Enauta initiated the bidding process for a new FPSO for the FDS in March 2021, expected to be completed in the first quarter of 2022. The new FPSO will have a production capacity of 50,000 bopd.
- The FDS will include six to eight production wells, including the three existing EPS wells, tied back to the new FPSO. The bidding process for subsea systems and wells began in the second quarter of 2021.
- Expansion projects, namely the Atlanta Full Development System (FDS) Stage 1 and Stage 2, are currently in the commissioning and construction stage, targeting start-up during 2024-2029.

Main Contractors:
- Sapura Energy is the main EPC contractor for the project.
- Other contractors include DP World, Enauta Participações, Amarinth, Akselos, and Constellation Oil Services.
Drilling and Rig Services:
- Diamond Offshore supplied the Ocean Star semi-submersible rig for drilling activities.

Production was affected by issues in the oil heating system and the water separation and treatment system of the FPSO in the second half of 2020, leading to a halt in production in mid-November 2020.
Production resumed with the start of operations of a well in the EPS in February 2021, followed by the second well in May 2021, and the third well was anticipated to resume production in July 2021.

The Atlanta field development partners entered into a Crude Oil Sales Agreement (COSA) with Shell Western Supply and Trading in 2015. Shell buys the oil produced by the Atlanta field in the early production phase.

Peak production from the Atlanta field is expected in 2028, with production continuing until the field reaches its economic limit in 2044. As of the latest data, the field has recovered 19.73% of its total recoverable reserves.