Santos Basin pre salt, Rio De Janeiro, Brazil
The Buzios (formerly Franco) field is located within the Cessão Onerosa (Transfer of Rights) region of the pre-salt Santos Basin. The offshore field covers an area of 416km² and is situated approximately 200km off the coast of Rio de Janeiro at water depths ranging from 1,600m to 2,100m.
Petrobras, the sole owner of the field, presented the proposal for the Declaration of Commerciality to the National Petroleum, Natural Gas and Biofuels Agency (ANP) of Brazil in December 2013.
First production from the field was achieved in April 2018. Petrobras aims to produce 3.058 billion barrels of oil equivalent from the Brazilian field.
Buzios field discovery and exploration
Buzios field was discovered in 2010 by the 2-ANP-1-RJS (Franco) discovery well, which flowed at an initial test rate of 50,000 barrels of oil equivalent per day (boepd) from the pre-salt reservoir.
The extension well is known as 3-BRSA-1184-RJS (3-RJS-723/Franco Leste). It is situated 7.5km south-east of Franco and was completed in November 2013 to a total depth of 5,900m. The well encountered a 396m column of oil.
Petrobras acquired 3D seismic data for the entire area and drilled two mandatory wells, as well as six additional wells at the field. The oil quality is rated between 26º and 28º API.
FPSOs for Buzios (Franco)
The field was developed using four FPSOs, P-74, P-75, P-76 and P-77, which were converted from very large crude carriers (VLCCs). P-76 is designed to have a daily production capacity of 180,000 barrels of oil and seven million cubic metres of gas, while the other three vessels have a designed daily production capacity of 150,000 barrels of oil and seven million cubic metres of gas.
P-74, P-75, P-76 and P-77 were installed within Franco 1 (Buzios 1), Franco SW (Búzios 2), Franco Sul (Búzios 3) and Franco NW (Búzios 4) areas respectively.
Production at P-74 started in April 2018 and P-75 began in November. P-76 was commissioned in February 2019, while P-77 will be commissioned later in the same year. Each vessel has an accommodation capacity for 110 people.
A proposed fifth FPSO is also planned to be installed at the field.
Contractors involved with Buzios
Topsides of P-74 were constructed by EBR, a consortium formed by Setal and Toyo, while those of P-76 were constructed by Technip-Technit, a consortium of Technip Brazil and Techint. The Technip-Technit consortium contracted Bureau-Veritas to conduct safety studies for P-76.
The contract for the construction and integration of the topside modules for P-75 and P-77 was awarded to RIG Consortium formed by Queiroz Galvão, Camargo Correa and IESA.
Conversion of the hulls of all four VLCCs into FPSO platforms was performed by Enseada Indústria Naval, a joint-venture (JV) of Odebrecht, OAS, UTC and Kawasaki Heavy Industries (KHI). Accommodation modules on all four FPSOs were installed by BSL, a JV of SBM Offshore and Naval Ventures Corp (Synergy Group).
Aibel fabricated five modules for P-74 under a subcontract with EBR. The lifting, transportation and installation of P-74’s accommodation and service modules at Rio de Janeiro were performed by ALE, while the transportation of the foundation decks was performed by Jumbo.
West Delta Deep Marine (WDDM) concession in the Mediterranean Sea comprises 19 gas fields.
GE Oil & Gas supplied the main turbomachinery equipment for the four FPSOs, while Dresser-Rand supplied its DATUM compressor trains for the FPSOs.
Suppliers and contractors involved in the project are Frames, Flenco, GEA do Brasil, Novenco Marine & Offshore, Mampaey Offshore Industries, Syncor, EPS and Emerson.