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Title: Potiguar basin: geologic model and habitat of oil of a Brazilian equatorial basin

Abstract

The Potiguar basin integrates the eastern part of the Brazilian equatorial Atlantic-type margin. The rifting stage of this basin occurred during the Neocomian and Aptian. The drifting stage and sea-floor spreading began in the Late Albian. The rifting stage clearly was intracratonic during the Neocomian and is recognized as a mosaic of half-grabens trending mostly northeast-southwest and filled with syntectonic lacustrine siliciclastics. The half-graben pattern exhibits rotation of beds into the major fault zone, and the preserved uplifted margins display either paleostructures of paleogeomorphic features with hydrocarbons. A regional pre-Aptian unconformity preceded the Aptian proto-oceanic rifting stage which was characterized by syntectonic fluvio-deltaic sediments. The Aptian tectonics were represented by reactivation of former lineaments superimposed by predominant east-west normal faulting. Structural highs during this stage are so far the most prolific oil accumulations. The most important source beds and reservoir rocks are both Neocomian and Aptian sediments. Geochemistry and hydrodynamics have shown that hydrocarbon migration was driven through fracture or fault zones in both Aptian or Albian plays. Lithofacies maps support this interpretation because pools occur whenever adjacent downthrown blocks present a high shale content.

Authors:
; ; ;
Publication Date:
Research Org.:
Petroleo Brasileiro S/A, Rio De Janeiro, Brazil
OSTI Identifier:
6573287
Report Number(s):
CONF-8405216-
Journal ID: CODEN: AAPGB
Resource Type:
Conference
Journal Name:
Am. Assoc. Pet. Geol., Bull.; (United States)
Additional Journal Information:
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; PETROLEUM DEPOSITS; SEDIMENTARY BASINS; GEOLOGIC MODELS; GEOLOGIC STRUCTURES; SHALES; TECTONICS; DEVELOPING COUNTRIES; GEOLOGIC DEPOSITS; LATIN AMERICA; MINERAL RESOURCES; RESOURCES; ROCKS; SEDIMENTARY ROCKS; SOUTH AMERICA; 020200* - Petroleum- Reserves, Geology, & Exploration

Citation Formats

Falkenhein, F U, Barros, R M, Da Costa, I G, and Cainelli, C. Potiguar basin: geologic model and habitat of oil of a Brazilian equatorial basin. United States: N. p., 1984. Web.
Falkenhein, F U, Barros, R M, Da Costa, I G, & Cainelli, C. Potiguar basin: geologic model and habitat of oil of a Brazilian equatorial basin. United States.
Falkenhein, F U, Barros, R M, Da Costa, I G, and Cainelli, C. 1984. "Potiguar basin: geologic model and habitat of oil of a Brazilian equatorial basin". United States.
@article{osti_6573287,
title = {Potiguar basin: geologic model and habitat of oil of a Brazilian equatorial basin},
author = {Falkenhein, F U and Barros, R M and Da Costa, I G and Cainelli, C},
abstractNote = {The Potiguar basin integrates the eastern part of the Brazilian equatorial Atlantic-type margin. The rifting stage of this basin occurred during the Neocomian and Aptian. The drifting stage and sea-floor spreading began in the Late Albian. The rifting stage clearly was intracratonic during the Neocomian and is recognized as a mosaic of half-grabens trending mostly northeast-southwest and filled with syntectonic lacustrine siliciclastics. The half-graben pattern exhibits rotation of beds into the major fault zone, and the preserved uplifted margins display either paleostructures of paleogeomorphic features with hydrocarbons. A regional pre-Aptian unconformity preceded the Aptian proto-oceanic rifting stage which was characterized by syntectonic fluvio-deltaic sediments. The Aptian tectonics were represented by reactivation of former lineaments superimposed by predominant east-west normal faulting. Structural highs during this stage are so far the most prolific oil accumulations. The most important source beds and reservoir rocks are both Neocomian and Aptian sediments. Geochemistry and hydrodynamics have shown that hydrocarbon migration was driven through fracture or fault zones in both Aptian or Albian plays. Lithofacies maps support this interpretation because pools occur whenever adjacent downthrown blocks present a high shale content.},
doi = {},
url = {https://www.osti.gov/biblio/6573287}, 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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