During the test, the well achieved flow rates of about 5,600 barrels of oil a day for 32 hours, through a 40/64 choke from a limited perforated interval.
Following the test, results from the pressure build-up after the main flow have shown good connectivity in the reservoir, while long term pressure monitoring gauges were installed in the wellbore before the end of operations.
The Itaipu-1A pre-salt well is situated in block BM-C-32 in the deepwater sector of the Campos Basin, about 125km off the coast of Brazil.
The well, which was initially drilled by Devon in 2009, came under BP’s portfolio when the oil and gas major acquired Devon’s interests in Brazil during 2011.
BP Brazil vice president for exploration, Neil Piggott, said the good result for the Itaipu project indicates that commercially viable flow rates can be achieved from the pre-salt carbonate reservoir.
BP drilled the Itaipu-2 appraisal well in 2011, and laid plans to drill a second appraisal well, Itaipu-3, jointly with the Brazilian National Petroleum Agency (ANP), at the Itaipu field by the end of 2013.
Holding 40% interest, BP is the operator of BM-C-32, while other partners are Anadarko Petroleum and Maersk Energia, holding 33.3% and 26.7% interest respectively.
In August 2012, BP along with Petrobras announced an oil discovery in a deepwater well located in the Ceara Basin offshore of Brazil.
Petrobras, the operator of the concession with a 60% stake, said it found a 290m-long hydrocarbon column with 140m of net pay in the newly named Pecem well.
Image: The Itaipu-1A pre-salt well is in block BM-C-32 in the deepwater sector of the Campos Basin, off the coast of Brazil. Photo courtesy of freedigitalphotos / suwatpo.