Búzios oil field

Búzios oil field is a large ultra-deepwater oil field located in the Santos Basin, about 230 km (140 mi) off the coast of Rio de Janeiro, Brazil. Originally named Franco oil field, it was the second largest pre-salt find in the basin since 2007, behind Lula, which holds between 5 and 8 billion barrels (790 and 1,270 million cubic metres) equivalent and is located just south of the Búzios oil field.[1][2][3]

Búzios oil field
Location of the field in the Santos Basin
Country Brazil
RegionSantos Basin
BlockBM-S-11
Offshore/onshoreOffshore
Coordinates24°47′22″S 42°19′08″W
OperatorPetrobras
Field history
Discovery2010
Production
Estimated oil in place3,058 million barrels (~4.172×10^8 t)
Producing formationsGuaratiba Group

Etymology

The field was named after Búzios, Rio de Janeiro.

History

The field was discovered in May 2010 with an encounter of light oil which measured 30° API.[1] The find was announced on May 14, 2010, however the Brazilian authorities claim the second well named Libra proved to be even larger than Búzios oil field. Libra is located 31 kilometres (19 mi) from Búzios and was drilled by Petrobras, contracted by the Brazilian National Agency of Petroleum (ANP).[3][4] It was also announced that Franco was not linked to Iara field located near the discovery.[2] Búzios was owned by ANP, who paid Petrobras a total of $150 million to drill the well.[5]

Reservoir
Main article: Santos Basin § I - Guaratiba Group (Hauterivian-Aptian, pre-salt sequence)

The region the reservoir is located in is 200 kilometres (120 mi) wide and 800 kilometres (500 mi) long.[3] The pre-salt reservoir of the Guaratiba Group is located at a water depth of 2,000 metres (6,600 ft) and under 5,000 metres (16,000 ft) of overburden.[4] The field is estimated to contain 3,058 million bbl (486.2 million m3),[6] down from an initial estimate of 4.5 billion bbl (720 million m3). The rock layer is 272 metres (892 ft) thick which makes it less difficult for production. ANP official stated there was no gas discovered in the prospect, making the field more profitable and easier to develop.[5]

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See also

References
  1. Fabio Palmigiani (2010-05-12). "Brazil's Franco prospect holds 4.5bn barrels". Upstream Online. Retrieved 2010-05-17.
  2. "Two big oil finds in a row for Brazil". Edmonton Journal. 2010-05-15. Archived from the original on 2010-05-18. Retrieved 2010-05-17.
  3. Reese Ewing (2010-05-14). "Brazil sees second major offshore oil discovery". Reuters. Retrieved 2010-05-17.
  4. "Brazil: ANP's Santos Basin Franco presalt well holds recoverable reserves of 4.5 billion barrels". Energypedia News. 2010-05-12. Retrieved 2010-05-17.
  5. Peter Millard (2010-05-14). "Brazil May Top Second Biggest Pre-Salt Find at Well". Bloomberg Businessweek. Retrieved 2010-05-18.
  6. Buzios (formerly Franco) Field, Cessão Onerosa Region, Santos Basin, Brazil
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