Petroleum habitat in the prerift and synrift sequences in the Brazilian sedimentary basins

Conference · Thu Feb 28 23:00:00 EST 1991 · AAPG Bulletin (American Association of Petroleum Geologists); (United States)

OSTI ID:5685875

Guimaraes, P D.T.M.; Fernandes, G J.F.; De Figueiredo, A M.F. ^[1]

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1. Petrobras, Rio de Janeiro (Brazil)

The Late Jurassic and Early Cretaceous strata represent the sedimentary sequences deposited during the prerift and synrift tectonic phases in Brazilian basins. These basins developed by crustal thinning and rupture related to the separation of the African and South American continents. Since the beginning of oil exploration in Brazil, 139 oil and gas accumulations have been found in prerift and synrift sediments. Most of these accumulations occur in continental sandstones, but a few of them are also present in lacustrine carbonates and basalts. The hydrocarbon-producing basins in these sequences are Campos, Reconcavo, Tucano-Sul, Sergipe-Alagoas, Potiguar, and Ceara; with a volume of 1.46 {times} 10{sup 9} m{sup 3} (9.21 {times} 10{sup 9} bbl) oil equivalent in place and a proved exploitable reserve of 112.5 {times} 10{sup 6} m{sup 3} (708 {times} 10{sup 6} bbl). Their contribution to the oil industry in Brazil amounts to 340 {times} 10{sup 6} m{sup 3} (2.14 {times} 10{sup 9} bbl) of oil equivalent already produced. In spite of the exploration maturity of the basins, technological advancements will ensure the continuation and refinement of exploration in the Late Jurassic and Early Cretaceous sequences of the producing basins as well as in the potential ones. The volumes of oil and gas already discovered justify additional investigation in these sequences.

• OSTI ID: 5685875
• Report Number(s): CONF-910403--
• Journal Information: AAPG Bulletin (American Association of Petroleum Geologists); (United States), Journal Name: AAPG Bulletin (American Association of Petroleum Geologists); (United States) Vol. 75:3; ISSN AABUD; ISSN 0149-1423
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
BRAZIL
CRETACEOUS PERIOD
DEVELOPING COUNTRIES
ENERGY SOURCES
EXPLORATION
FOSSIL FUELS
FUELS
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGIC HISTORY
GEOLOGIC STRUCTURES
JURASSIC PERIOD
LATIN AMERICA
MESOZOIC ERA
MINERAL RESOURCES
PETROLEUM
PETROLEUM DEPOSITS
PLATE TECTONICS
RESERVES
RESOURCES
RIFT ZONES
SEDIMENTARY BASINS
SOUTH AMERICA
TECTONICS