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Title: Geology and major oil plays, Coastal Margin basins, Brazil

Abstract

Six major tectonic-depositional sequences, reflecting rift and passive margin evolution, variously characterize the filling of Brazilian coastal margin basins: (1) Late Jurassic prerift, (2) Early Cretaceous tectonic rift, (3) Early Cretaceous quiescent stage (evaporitic or calcilutitic), (4) middle Cretaceous platform/deltaic progradational and deep marine retrogradation, and (6) Tertiary main passive margin progradation. Habitat of oil discovered to date meets two regional geologic conditions: (1) in tectonic rifts known to have basin core of starved, lacustrine shales, and (2) in basins which developed a quiescent phase during the transition from tectonic rift to passive margin. Two major plays characterize the central core rifts, including (I) underlying prerift sediments in fault contact with the central core, and (II) sublacustrine fans overlying the central core. These plays, typified in the Reconcavo basin, constitute about half the recoverable oil found to date. Exploration implications of the established plays are: (1) source is from tectonic or quiescent stage fill (Aptian or older); (2) structural integrity of the quiescent stage seals is critical to oil migration; and (3) tectonic rifts are productive when a core of deep lacustrine shales was developed.

Authors:
;
Publication Date:
Research Org.:
PETROBRAS, Rio de Janeiro, Brazil
OSTI Identifier:
6186220
Alternate Identifier(s):
OSTI ID: 6186220
Report Number(s):
CONF-8405216-
Journal ID: CODEN: AAPGB
Resource Type:
Conference
Resource Relation:
Journal Name: Am. Assoc. Pet. Geol., Bull.; (United States); Journal Volume: 68:4; Conference: AAPG annual convention, San Antonio, TX, USA, 20 May 1984
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; BRAZIL; CONTINENTAL MARGIN; SEDIMENTARY BASINS; PETROLEUM DEPOSITS; EXPLORATION; PETROLEUM GEOLOGY; CARBONATE ROCKS; CRETACEOUS PERIOD; DEPOSITION; JURASSIC PERIOD; SOURCE ROCKS; TECTONICS; TERTIARY PERIOD; CENOZOIC ERA; DEVELOPING COUNTRIES; GEOLOGIC AGES; GEOLOGIC DEPOSITS; GEOLOGIC STRUCTURES; GEOLOGY; LATIN AMERICA; MESOZOIC ERA; MINERAL RESOURCES; RESOURCES; ROCKS; SEDIMENTARY ROCKS; SOUTH AMERICA 020200* -- Petroleum-- Reserves, Geology, & Exploration

Citation Formats

Mosmann, R., and Fisher, W.L. Geology and major oil plays, Coastal Margin basins, Brazil. United States: N. p., 1984. Web.
Mosmann, R., & Fisher, W.L. Geology and major oil plays, Coastal Margin basins, Brazil. United States.
Mosmann, R., and Fisher, W.L. Sun . "Geology and major oil plays, Coastal Margin basins, Brazil". United States. doi:.
@article{osti_6186220,
title = {Geology and major oil plays, Coastal Margin basins, Brazil},
author = {Mosmann, R. and Fisher, W.L.},
abstractNote = {Six major tectonic-depositional sequences, reflecting rift and passive margin evolution, variously characterize the filling of Brazilian coastal margin basins: (1) Late Jurassic prerift, (2) Early Cretaceous tectonic rift, (3) Early Cretaceous quiescent stage (evaporitic or calcilutitic), (4) middle Cretaceous platform/deltaic progradational and deep marine retrogradation, and (6) Tertiary main passive margin progradation. Habitat of oil discovered to date meets two regional geologic conditions: (1) in tectonic rifts known to have basin core of starved, lacustrine shales, and (2) in basins which developed a quiescent phase during the transition from tectonic rift to passive margin. Two major plays characterize the central core rifts, including (I) underlying prerift sediments in fault contact with the central core, and (II) sublacustrine fans overlying the central core. These plays, typified in the Reconcavo basin, constitute about half the recoverable oil found to date. Exploration implications of the established plays are: (1) source is from tectonic or quiescent stage fill (Aptian or older); (2) structural integrity of the quiescent stage seals is critical to oil migration; and (3) tectonic rifts are productive when a core of deep lacustrine shales was developed.},
doi = {},
journal = {Am. Assoc. Pet. Geol., Bull.; (United States)},
number = ,
volume = 68:4,
place = {United States},
year = {Sun Apr 01 00:00:00 EST 1984},
month = {Sun Apr 01 00:00:00 EST 1984}
}

Conference:
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