Petrobras, Galp, QGEP and Barra confirm large Brazil oil discovery

May 29, 2015 12:00 AM

Brazil's state-run Petrobras, Portugal's Galp and Brazilian oil companies QGEP Participações and Barra Energia have confirmed that the giant Carcará offshore find extends far beyond the initial discovery, Barra said in a statement.

Drilling in the 3-SPS-105 well in the Carcará N evaluation well about 250 km south of Rio de Janeiro has discovered light oil at 31 degrees on the American Petroleum Institute scale, Barra said. The oil is contained in a continuous column of oil bearing rock that is at least 358 meters (1,175 feet). The discovery shows the oil-bearing rock is connected to the previous Carcará find in the same BM-S-8 block. The block is 66 percent owned by Petrobras, which is also the operator. Galp Energia SGPS owns 14 percent, QGEP owns 10 percent and Barra owns 10 percent.

Discovered in 2012, Carcará was found to have up to 400 meters of continuous and connected oil reserves with excellent porosity and permeability. At the time it was the biggest oil column ever found in Brazil's so-called subsalt region, an area where large oil resources are trapped deep beneath the seabed by a layer of mineral salts. The Carcará N well confirmed the size of the column discovered at Carcará and show similar porosity and permeability, suggesting that the area, if and when it is declared commercial, will be able to produce large amounts of oil.

The group plans to re-enter the Carcará NW evaluation well west of Carcará N in the second half of the year, Barra said. The well has been drilled to the base of the salt.

Photo - see caption
Location of Carcara (Source: Petrobras)

In January 2013, a QGEP official said that the area's wells will likely produce up to 35,000 barrels of oil a day each, a large amount for such offshore fields and similar to that at Petrobras' successful Lula field.

The Carcará N well was drilled to a depth of 6,178 meters by Odebrecht Oil & Gas's ODN II drillship.

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