Petro Rio SA has begun the third phase of its revitalization plan for Polvo oil field in the Campos basin off Brazil. For the phase, the company has mapped 22 prospects with oil potential for a new drilling campaign. At a cost of $20-60 million, dependent upon commerciality, up to four prospects will be drilled this year. Eighteen prospects have been selected for future campaigns.
The first stage of the 2019 drilling campaign will include a workover and the drilling of two wells. The workover, which is expected to take 10 days, consists of the substitution of an electric submersible pump (ESP) in the POL-R producing well. It is expected to increase production by 300 b/d of oil. Once completed, PetroRio will begin the drilling of the Ipanema (POL-N) and Leblon (POL-Na) prospects. The primary objective is to test carbonates at 1,900 m from the Quissama formation, with rock quality and API characteristics similar to other carbonate reservoirs in Polvo. The secondary objective is to test sandstone from the Carapebus formation.
Drilling of each well is expected to take 2 months. The company estimates the aforementioned drilling could add 3-6 million bbl to its reserves, to be confirmed by the reserve certification report.
Data collected will be used to decide on the second stage, which could include the Arpoador and Piratininga prospects.
Phase 1, which took place in the first quarter of 2016, resulted in a 20% increase in production and reserves. Phase 2, which took place in 2018, further increased production by 65%.
According to Petro Rio’s web site, Polvo field, in 100 m of water 100 km off Rio de Janeiro, produces 9,200 b/d through two offshore units: the Polvo A fixed platform and the Polvo FPSO. The field went on commercial production in 2007.
