Depositional controls over the lacustrine source rocks of the cuyana basin: an approach to model a mechanical cyclicity through an integrated analysis of sequence stratigraphy, petrophysics and rock properties

"Integrating field and laboratory data is possible if there are strong geologic criteria to relate them. This challenge demands understanding rocks from the fabric and mineralogy up to the architectural elements of rock bodies at a basinal scale. The geological properties of rocks, being them c...

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Autores principales: Barredo, Silvia, Sosa Massaro, Agustín, Fuenmayor, Evanna, Abalos, Roxana, Stinco, Luis, Abarzúa, Fernando
Formato: Ponencias en Congresos acceptedVersion
Lenguaje:Inglés
Publicado: 2019
Materias:
SHALE OIL
SHALE GAS
FRACTURA
ESTRATIGRAFIA
ROCAS SEDIMENTARIAS
DEPOSICION
Acceso en línea:http://ri.itba.edu.ar/handle/123456789/1706
Aporte de:
Repositorio Institucional Instituto Tecnológico de Buenos Aires (ITBA) de Instituto Tecnológico de Buenos Aires (ITBA)
id I32-R138-123456789-1706
record_format dspace
spelling I32-R138-123456789-17062022-12-07T14:13:51Z Depositional controls over the lacustrine source rocks of the cuyana basin: an approach to model a mechanical cyclicity through an integrated analysis of sequence stratigraphy, petrophysics and rock properties Barredo, Silvia Sosa Massaro, Agustín Fuenmayor, Evanna Abalos, Roxana Stinco, Luis Abarzúa, Fernando SHALE OIL SHALE GAS FRACTURA ESTRATIGRAFIA ROCAS SEDIMENTARIAS DEPOSICION "Integrating field and laboratory data is possible if there are strong geologic criteria to relate them. This challenge demands understanding rocks from the fabric and mineralogy up to the architectural elements of rock bodies at a basinal scale. The geological properties of rocks, being them clastic, chemical or biochemical, influence reservoir quality and hydrocarbon producibility, but continental mudrocks/siltstones (shales) are by far more complex because of their depositional nature and ighly variable vertical and lateral sedimentary characteristics. Grain size variability and sedimentary structures are common in these rocks. From outcrops, well logs and the source rocks of the Cuyana Basin (Argentina) could be characterized as deposited in lacustrine environments under a strong tectonic and climatic influence. Silty sandstones, limestones, massive and laminated bituminous shales developed in underfilled and balanced to overfilled lakes. They display arallel/inclined/rippled laminations, coarsening/fining upwards patterns, nodules, scour surfaces and pedogenic features. Total organic content may reach 14 % and corresponds to macro and micro floral remains, reshwater invertebrates and kerogen types I and II. These lithofacies are vertically stacked in patterns that can be related to cycles with different mechanical properties. In outcrops and with the help of seismic lines third order depositional sequences representing basin variations in accommodation space were recognized as low accommodation (LAS) to high accommodation (HAS) sequences developed in each of the three rifting stages. Using detailed information about mineralogy and fossil content climate was characterized and fourth order parasequences could be characterized. Fifth order (bedset-rhythms) cycles were interpreted on the basis of outcrops and well logs. Inorganic (especially clays) and organic content, pedogenic fabric, burrows and microfracturing represent weakness planes and as they vary according to these cycles, it was possible to model a mechanical cyclicity along the whole lacustrine column and to analyze their depositional controls. This integrated study has provided relevant data for the understanding of the geological and mechanical properties that will contribute to the optimization of fracture programs." 2019-08-12T18:45:08Z 2019-08-12T18:45:08Z 2017-05 Ponencias en Congresos info:eu-repo/semantics/acceptedVersion 978-1510-84-195-6 http://ri.itba.edu.ar/handle/123456789/1706 en info:eu-repo/grantAgreement/CONICET/PIP/5120(EGO)/AR. Ciudad Autónoma de Buenos Aires info:eu-repo/grantAgreement/UBA/UBACyT/X182: 2008-2010 (VAR.)/AR. Ciudad Autónoma de Buenos Aires info:eu-repo/grantAgreement/CONICET/AR. Ciudad Autónoma de Buenos Aires info:eu-repo/grantAgreement/ITBA/ITBACyT/70/AR. Ciudad Autónoma de Buenos Aires info:eu-repo/semantics/altIdentifier/doi/10.2118/185529-ms application/pdf Cuenca Cuyana (Argentina)
institution Instituto Tecnológico de Buenos Aires (ITBA)
institution_str I-32
repository_str R-138
collection Repositorio Institucional Instituto Tecnológico de Buenos Aires (ITBA)
language Inglés
topic SHALE OIL
SHALE GAS
FRACTURA
ESTRATIGRAFIA
ROCAS SEDIMENTARIAS
DEPOSICION
spellingShingle SHALE OIL
SHALE GAS
FRACTURA
ESTRATIGRAFIA
ROCAS SEDIMENTARIAS
DEPOSICION
Barredo, Silvia
Sosa Massaro, Agustín
Fuenmayor, Evanna
Abalos, Roxana
Stinco, Luis
Abarzúa, Fernando
Depositional controls over the lacustrine source rocks of the cuyana basin: an approach to model a mechanical cyclicity through an integrated analysis of sequence stratigraphy, petrophysics and rock properties
topic_facet SHALE OIL
SHALE GAS
FRACTURA
ESTRATIGRAFIA
ROCAS SEDIMENTARIAS
DEPOSICION
description "Integrating field and laboratory data is possible if there are strong geologic criteria to relate them. This challenge demands understanding rocks from the fabric and mineralogy up to the architectural elements of rock bodies at a basinal scale. The geological properties of rocks, being them clastic, chemical or biochemical, influence reservoir quality and hydrocarbon producibility, but continental mudrocks/siltstones (shales) are by far more complex because of their depositional nature and ighly variable vertical and lateral sedimentary characteristics. Grain size variability and sedimentary structures are common in these rocks. From outcrops, well logs and the source rocks of the Cuyana Basin (Argentina) could be characterized as deposited in lacustrine environments under a strong tectonic and climatic influence. Silty sandstones, limestones, massive and laminated bituminous shales developed in underfilled and balanced to overfilled lakes. They display arallel/inclined/rippled laminations, coarsening/fining upwards patterns, nodules, scour surfaces and pedogenic features. Total organic content may reach 14 % and corresponds to macro and micro floral remains, reshwater invertebrates and kerogen types I and II. These lithofacies are vertically stacked in patterns that can be related to cycles with different mechanical properties. In outcrops and with the help of seismic lines third order depositional sequences representing basin variations in accommodation space were recognized as low accommodation (LAS) to high accommodation (HAS) sequences developed in each of the three rifting stages. Using detailed information about mineralogy and fossil content climate was characterized and fourth order parasequences could be characterized. Fifth order (bedset-rhythms) cycles were interpreted on the basis of outcrops and well logs. Inorganic (especially clays) and organic content, pedogenic fabric, burrows and microfracturing represent weakness planes and as they vary according to these cycles, it was possible to model a mechanical cyclicity along the whole lacustrine column and to analyze their depositional controls. This integrated study has provided relevant data for the understanding of the geological and mechanical properties that will contribute to the optimization of fracture programs."
format Ponencias en Congresos
acceptedVersion
author Barredo, Silvia
Sosa Massaro, Agustín
Fuenmayor, Evanna
Abalos, Roxana
Stinco, Luis
Abarzúa, Fernando
author_facet Barredo, Silvia
Sosa Massaro, Agustín
Fuenmayor, Evanna
Abalos, Roxana
Stinco, Luis
Abarzúa, Fernando
author_sort Barredo, Silvia
title Depositional controls over the lacustrine source rocks of the cuyana basin: an approach to model a mechanical cyclicity through an integrated analysis of sequence stratigraphy, petrophysics and rock properties
title_short Depositional controls over the lacustrine source rocks of the cuyana basin: an approach to model a mechanical cyclicity through an integrated analysis of sequence stratigraphy, petrophysics and rock properties
title_full Depositional controls over the lacustrine source rocks of the cuyana basin: an approach to model a mechanical cyclicity through an integrated analysis of sequence stratigraphy, petrophysics and rock properties
title_fullStr Depositional controls over the lacustrine source rocks of the cuyana basin: an approach to model a mechanical cyclicity through an integrated analysis of sequence stratigraphy, petrophysics and rock properties
title_full_unstemmed Depositional controls over the lacustrine source rocks of the cuyana basin: an approach to model a mechanical cyclicity through an integrated analysis of sequence stratigraphy, petrophysics and rock properties
title_sort depositional controls over the lacustrine source rocks of the cuyana basin: an approach to model a mechanical cyclicity through an integrated analysis of sequence stratigraphy, petrophysics and rock properties
publishDate 2019
url http://ri.itba.edu.ar/handle/123456789/1706
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