Seismic sequence stratigraphy of a foreland unit inthe magallanes-austral basin, dorado riquelme block,Chile: Implications for deep-marine reservoirs

This contribution presents geological data that provides a sequence-stratigraphic-based exploration model for Oligocene units in the central Magallanes-Austral Foreland Basin, and identifies the related sedimentary deposits that constitute basin-floor fan reservoirs. The study area is located in the...

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Autor principal: Gallardo, R.E.
Formato: JOUR
Materias:
Dorado riquelme exploration block
Foreland III succession
Magallanes-austral foreland basin
Sequence stratigraphy
Tropilla basin-floor fan
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_16697316_v21_n1_p49_Gallardo
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_16697316_v21_n1_p49_Gallardo
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spelling todo:paper_16697316_v21_n1_p49_Gallardo2023-10-03T16:29:26Z Seismic sequence stratigraphy of a foreland unit inthe magallanes-austral basin, dorado riquelme block,Chile: Implications for deep-marine reservoirs Gallardo, R.E. Dorado riquelme exploration block Foreland III succession Magallanes-austral foreland basin Sequence stratigraphy Tropilla basin-floor fan This contribution presents geological data that provides a sequence-stratigraphic-based exploration model for Oligocene units in the central Magallanes-Austral Foreland Basin, and identifies the related sedimentary deposits that constitute basin-floor fan reservoirs. The study area is located in the Magallanes Region, Chile, and it was discovered in 2009-2010 by the joint venture of the National Oil Company of Chile and Methanex group at Dorado Riquelme Block. Seismic stratigraphic analysis of the Magallanes-Austral Foreland Basin enabled the definition of four evolutionary stages using 3D seismic information from a 91.6 km long section, as well as lithostratigraphic and biostratigraphic records and wireline logs. The clinoforms observed in the Foreland III stage of the Magallanes-Austral Foreland Basin are the focus of this study. Six seismic units (SU-1 to SU-6) and twenty-five depositional sequences were identified there, based on temporal affinity and genetic mechanisms. The youngest four seismic units comprise alternating forestepping and downstepping prograding patterns, while the fifth seismic unit is characterized by a backstepping pattern, which is followed by a sixth seismic unit in which forestepping patterns are again developed. The most important reservoirs were identified in seismic unit SU-2, and they are associated with sandstone-prone deposits accumulated in basin-floor fans. Their development is associated in this contribution with periods of relative sea-level fall during forced regressions. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_16697316_v21_n1_p49_Gallardo
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Dorado riquelme exploration block
Foreland III succession
Magallanes-austral foreland basin
Sequence stratigraphy
Tropilla basin-floor fan
spellingShingle Dorado riquelme exploration block
Foreland III succession
Magallanes-austral foreland basin
Sequence stratigraphy
Tropilla basin-floor fan
Gallardo, R.E.
Seismic sequence stratigraphy of a foreland unit inthe magallanes-austral basin, dorado riquelme block,Chile: Implications for deep-marine reservoirs
topic_facet Dorado riquelme exploration block
Foreland III succession
Magallanes-austral foreland basin
Sequence stratigraphy
Tropilla basin-floor fan
description This contribution presents geological data that provides a sequence-stratigraphic-based exploration model for Oligocene units in the central Magallanes-Austral Foreland Basin, and identifies the related sedimentary deposits that constitute basin-floor fan reservoirs. The study area is located in the Magallanes Region, Chile, and it was discovered in 2009-2010 by the joint venture of the National Oil Company of Chile and Methanex group at Dorado Riquelme Block. Seismic stratigraphic analysis of the Magallanes-Austral Foreland Basin enabled the definition of four evolutionary stages using 3D seismic information from a 91.6 km long section, as well as lithostratigraphic and biostratigraphic records and wireline logs. The clinoforms observed in the Foreland III stage of the Magallanes-Austral Foreland Basin are the focus of this study. Six seismic units (SU-1 to SU-6) and twenty-five depositional sequences were identified there, based on temporal affinity and genetic mechanisms. The youngest four seismic units comprise alternating forestepping and downstepping prograding patterns, while the fifth seismic unit is characterized by a backstepping pattern, which is followed by a sixth seismic unit in which forestepping patterns are again developed. The most important reservoirs were identified in seismic unit SU-2, and they are associated with sandstone-prone deposits accumulated in basin-floor fans. Their development is associated in this contribution with periods of relative sea-level fall during forced regressions.
format JOUR
author Gallardo, R.E.
author_facet Gallardo, R.E.
author_sort Gallardo, R.E.
title Seismic sequence stratigraphy of a foreland unit inthe magallanes-austral basin, dorado riquelme block,Chile: Implications for deep-marine reservoirs
title_short Seismic sequence stratigraphy of a foreland unit inthe magallanes-austral basin, dorado riquelme block,Chile: Implications for deep-marine reservoirs
title_full Seismic sequence stratigraphy of a foreland unit inthe magallanes-austral basin, dorado riquelme block,Chile: Implications for deep-marine reservoirs
title_fullStr Seismic sequence stratigraphy of a foreland unit inthe magallanes-austral basin, dorado riquelme block,Chile: Implications for deep-marine reservoirs
title_full_unstemmed Seismic sequence stratigraphy of a foreland unit inthe magallanes-austral basin, dorado riquelme block,Chile: Implications for deep-marine reservoirs
title_sort seismic sequence stratigraphy of a foreland unit inthe magallanes-austral basin, dorado riquelme block,chile: implications for deep-marine reservoirs
url http://hdl.handle.net/20.500.12110/paper_16697316_v21_n1_p49_Gallardo
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