Detailed facies and architectural analysis of an ancient submarine (slope) channelised unit: Insights into reservoir distribution and connectivity

Autores
Schwarz, Ernesto; Arnott, R. William C.
Año de publicación
2008
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
A detailed facies and architectural characterization of a deep-water channelised unit is presented (Isaac Channel 5, Neoproterozoic Isaac Formation, Castle Creek area, Southern Canadian Cordillera). Isaac Channel 5, composed mostly of turbidites deposited on a gravitationally unstable slope, crops out discontinuously across a five-km-wide section. In Castle Creek South, Isaac Channel 5 is made up of three main facies assemblages: 1) sandstone-dominated channel-fill facies, 2) mudstone-dominated, thin-bedded overbank facies, and 3) muddy debrites and slump deposits. Channel-fill facies make up 68% of total exposed strata and occur in three vertically-stacked, multi-story channel complexes (8-30 m thick). Strata are dominated by amalgamated sandstone (56%) with the best reservoir characteristics, with lesser interbedded sandstone and postdepositionally brecciated mudstone-rich layers (26%), interbedded sandstone- and mudstone-rich strata (15%), and structureless sandstone (3%). Thin-bedded overbank facies cover 23% of the exposed area. Most of these strata (71%), which consist mostly of a few cm (0.4-9 in)-thick, laterally-persistent turbidite beds with moderate to poor reservoir characteristics, drape the channel complexes and exhibit an upward-fining and -thinning trend, inferred to reflect local channel-complex abandonment. Less commonly (18%), thin-bedded overbank facies are observed to interfinger with channel-fill facies. These strata, which are interpreted to be inner-bend levee deposits, are muddier and thinner than turbidites in the abandonment facies and have poor reservoir characteristics. This mudstone-rich facies occurs adjacent to channel fills and should be taken into account when evaluating levee deposits as potential reservoir targets. Muddy debrites and slump deposits are good stratigraphic markers within Isaac Channel 5 and make up the remaining 9% of the exposed section. These unstratified, mudstone-rich units have poor to no reservoir potential and very likely represent important impediments to subsurface fluid flow (barriers). Sandstone-rich channel-fill facies within each channel complex are locally interstatified with thin-bedded turbidites and slump deposits. Where present these fine-grained deposits do not extend across the full width of the outcrop. Composite channel fill sandstone within a discrete channel complex, therefore, forms a laterally and vertically contiguous reservoir unit interrupted locally by discontinuous (<500 m long) permeability baffles. Individual channel complexes, on the other hand, are vertically separated (compartimentalized) by laterally persistent muddy debrites and thin-bedded deposits that would constitute kilometer-scale barrier-type facies within a multi-layer reservoir (~ 100 m thick). Detailed facies characterization of this two-dimensional outcrop provides valuable insight into the geometry, continuity, and distribution of lithofacies at the scale of channel fills and channel-complexes in slope systems, in addition to an understanding of the lateral continuity and dimensions of potential barriers and baffles to fluid flow. This, in turn, may help improve the understanding of reservoir distribution, connectivity and performance in slope-channel reservoirs.
Fil: Schwarz, Ernesto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina
Fil: Arnott, R. William C.. University of Ottawa; Canadá
XII Reunión Argentina de Sedimentología
Ciudad Autónoma de Buenos Aires
Argentina
Asociacion Argentina de Sedimentologia
Materia
ANATOMY OF SLOPE CHANNEL-COMPLEX SETS
RESERVOIR CHARACTERIZATION
ISAAC FORMATION
SOUTHERN CANADIAN CORDILLERA
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/237267

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network_name_str CONICET Digital (CONICET)
spelling Detailed facies and architectural analysis of an ancient submarine (slope) channelised unit: Insights into reservoir distribution and connectivitySchwarz, ErnestoArnott, R. William C.ANATOMY OF SLOPE CHANNEL-COMPLEX SETSRESERVOIR CHARACTERIZATIONISAAC FORMATIONSOUTHERN CANADIAN CORDILLERAhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1A detailed facies and architectural characterization of a deep-water channelised unit is presented (Isaac Channel 5, Neoproterozoic Isaac Formation, Castle Creek area, Southern Canadian Cordillera). Isaac Channel 5, composed mostly of turbidites deposited on a gravitationally unstable slope, crops out discontinuously across a five-km-wide section. In Castle Creek South, Isaac Channel 5 is made up of three main facies assemblages: 1) sandstone-dominated channel-fill facies, 2) mudstone-dominated, thin-bedded overbank facies, and 3) muddy debrites and slump deposits. Channel-fill facies make up 68% of total exposed strata and occur in three vertically-stacked, multi-story channel complexes (8-30 m thick). Strata are dominated by amalgamated sandstone (56%) with the best reservoir characteristics, with lesser interbedded sandstone and postdepositionally brecciated mudstone-rich layers (26%), interbedded sandstone- and mudstone-rich strata (15%), and structureless sandstone (3%). Thin-bedded overbank facies cover 23% of the exposed area. Most of these strata (71%), which consist mostly of a few cm (0.4-9 in)-thick, laterally-persistent turbidite beds with moderate to poor reservoir characteristics, drape the channel complexes and exhibit an upward-fining and -thinning trend, inferred to reflect local channel-complex abandonment. Less commonly (18%), thin-bedded overbank facies are observed to interfinger with channel-fill facies. These strata, which are interpreted to be inner-bend levee deposits, are muddier and thinner than turbidites in the abandonment facies and have poor reservoir characteristics. This mudstone-rich facies occurs adjacent to channel fills and should be taken into account when evaluating levee deposits as potential reservoir targets. Muddy debrites and slump deposits are good stratigraphic markers within Isaac Channel 5 and make up the remaining 9% of the exposed section. These unstratified, mudstone-rich units have poor to no reservoir potential and very likely represent important impediments to subsurface fluid flow (barriers). Sandstone-rich channel-fill facies within each channel complex are locally interstatified with thin-bedded turbidites and slump deposits. Where present these fine-grained deposits do not extend across the full width of the outcrop. Composite channel fill sandstone within a discrete channel complex, therefore, forms a laterally and vertically contiguous reservoir unit interrupted locally by discontinuous (<500 m long) permeability baffles. Individual channel complexes, on the other hand, are vertically separated (compartimentalized) by laterally persistent muddy debrites and thin-bedded deposits that would constitute kilometer-scale barrier-type facies within a multi-layer reservoir (~ 100 m thick). Detailed facies characterization of this two-dimensional outcrop provides valuable insight into the geometry, continuity, and distribution of lithofacies at the scale of channel fills and channel-complexes in slope systems, in addition to an understanding of the lateral continuity and dimensions of potential barriers and baffles to fluid flow. This, in turn, may help improve the understanding of reservoir distribution, connectivity and performance in slope-channel reservoirs.Fil: Schwarz, Ernesto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; ArgentinaFil: Arnott, R. William C.. University of Ottawa; CanadáXII Reunión Argentina de SedimentologíaCiudad Autónoma de Buenos AiresArgentinaAsociacion Argentina de SedimentologiaAsociación Argentina de Sedimentología2008info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectReuniónBookhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/237267Detailed facies and architectural analysis of an ancient submarine (slope) channelised unit: Insights into reservoir distribution and connectivity; XII Reunión Argentina de Sedimentología; Ciudad Autónoma de Buenos Aires; Argentina; 2008; 168-168978-987-96296-3-5CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.sedimentologia.org.ar/spa/ras/Nacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:51:46Zoai:ri.conicet.gov.ar:11336/237267instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 09:51:46.518CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Detailed facies and architectural analysis of an ancient submarine (slope) channelised unit: Insights into reservoir distribution and connectivity
title Detailed facies and architectural analysis of an ancient submarine (slope) channelised unit: Insights into reservoir distribution and connectivity
spellingShingle Detailed facies and architectural analysis of an ancient submarine (slope) channelised unit: Insights into reservoir distribution and connectivity
Schwarz, Ernesto
ANATOMY OF SLOPE CHANNEL-COMPLEX SETS
RESERVOIR CHARACTERIZATION
ISAAC FORMATION
SOUTHERN CANADIAN CORDILLERA
title_short Detailed facies and architectural analysis of an ancient submarine (slope) channelised unit: Insights into reservoir distribution and connectivity
title_full Detailed facies and architectural analysis of an ancient submarine (slope) channelised unit: Insights into reservoir distribution and connectivity
title_fullStr Detailed facies and architectural analysis of an ancient submarine (slope) channelised unit: Insights into reservoir distribution and connectivity
title_full_unstemmed Detailed facies and architectural analysis of an ancient submarine (slope) channelised unit: Insights into reservoir distribution and connectivity
title_sort Detailed facies and architectural analysis of an ancient submarine (slope) channelised unit: Insights into reservoir distribution and connectivity
dc.creator.none.fl_str_mv Schwarz, Ernesto
Arnott, R. William C.
author Schwarz, Ernesto
author_facet Schwarz, Ernesto
Arnott, R. William C.
author_role author
author2 Arnott, R. William C.
author2_role author
dc.subject.none.fl_str_mv ANATOMY OF SLOPE CHANNEL-COMPLEX SETS
RESERVOIR CHARACTERIZATION
ISAAC FORMATION
SOUTHERN CANADIAN CORDILLERA
topic ANATOMY OF SLOPE CHANNEL-COMPLEX SETS
RESERVOIR CHARACTERIZATION
ISAAC FORMATION
SOUTHERN CANADIAN CORDILLERA
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv A detailed facies and architectural characterization of a deep-water channelised unit is presented (Isaac Channel 5, Neoproterozoic Isaac Formation, Castle Creek area, Southern Canadian Cordillera). Isaac Channel 5, composed mostly of turbidites deposited on a gravitationally unstable slope, crops out discontinuously across a five-km-wide section. In Castle Creek South, Isaac Channel 5 is made up of three main facies assemblages: 1) sandstone-dominated channel-fill facies, 2) mudstone-dominated, thin-bedded overbank facies, and 3) muddy debrites and slump deposits. Channel-fill facies make up 68% of total exposed strata and occur in three vertically-stacked, multi-story channel complexes (8-30 m thick). Strata are dominated by amalgamated sandstone (56%) with the best reservoir characteristics, with lesser interbedded sandstone and postdepositionally brecciated mudstone-rich layers (26%), interbedded sandstone- and mudstone-rich strata (15%), and structureless sandstone (3%). Thin-bedded overbank facies cover 23% of the exposed area. Most of these strata (71%), which consist mostly of a few cm (0.4-9 in)-thick, laterally-persistent turbidite beds with moderate to poor reservoir characteristics, drape the channel complexes and exhibit an upward-fining and -thinning trend, inferred to reflect local channel-complex abandonment. Less commonly (18%), thin-bedded overbank facies are observed to interfinger with channel-fill facies. These strata, which are interpreted to be inner-bend levee deposits, are muddier and thinner than turbidites in the abandonment facies and have poor reservoir characteristics. This mudstone-rich facies occurs adjacent to channel fills and should be taken into account when evaluating levee deposits as potential reservoir targets. Muddy debrites and slump deposits are good stratigraphic markers within Isaac Channel 5 and make up the remaining 9% of the exposed section. These unstratified, mudstone-rich units have poor to no reservoir potential and very likely represent important impediments to subsurface fluid flow (barriers). Sandstone-rich channel-fill facies within each channel complex are locally interstatified with thin-bedded turbidites and slump deposits. Where present these fine-grained deposits do not extend across the full width of the outcrop. Composite channel fill sandstone within a discrete channel complex, therefore, forms a laterally and vertically contiguous reservoir unit interrupted locally by discontinuous (<500 m long) permeability baffles. Individual channel complexes, on the other hand, are vertically separated (compartimentalized) by laterally persistent muddy debrites and thin-bedded deposits that would constitute kilometer-scale barrier-type facies within a multi-layer reservoir (~ 100 m thick). Detailed facies characterization of this two-dimensional outcrop provides valuable insight into the geometry, continuity, and distribution of lithofacies at the scale of channel fills and channel-complexes in slope systems, in addition to an understanding of the lateral continuity and dimensions of potential barriers and baffles to fluid flow. This, in turn, may help improve the understanding of reservoir distribution, connectivity and performance in slope-channel reservoirs.
Fil: Schwarz, Ernesto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina
Fil: Arnott, R. William C.. University of Ottawa; Canadá
XII Reunión Argentina de Sedimentología
Ciudad Autónoma de Buenos Aires
Argentina
Asociacion Argentina de Sedimentologia
description A detailed facies and architectural characterization of a deep-water channelised unit is presented (Isaac Channel 5, Neoproterozoic Isaac Formation, Castle Creek area, Southern Canadian Cordillera). Isaac Channel 5, composed mostly of turbidites deposited on a gravitationally unstable slope, crops out discontinuously across a five-km-wide section. In Castle Creek South, Isaac Channel 5 is made up of three main facies assemblages: 1) sandstone-dominated channel-fill facies, 2) mudstone-dominated, thin-bedded overbank facies, and 3) muddy debrites and slump deposits. Channel-fill facies make up 68% of total exposed strata and occur in three vertically-stacked, multi-story channel complexes (8-30 m thick). Strata are dominated by amalgamated sandstone (56%) with the best reservoir characteristics, with lesser interbedded sandstone and postdepositionally brecciated mudstone-rich layers (26%), interbedded sandstone- and mudstone-rich strata (15%), and structureless sandstone (3%). Thin-bedded overbank facies cover 23% of the exposed area. Most of these strata (71%), which consist mostly of a few cm (0.4-9 in)-thick, laterally-persistent turbidite beds with moderate to poor reservoir characteristics, drape the channel complexes and exhibit an upward-fining and -thinning trend, inferred to reflect local channel-complex abandonment. Less commonly (18%), thin-bedded overbank facies are observed to interfinger with channel-fill facies. These strata, which are interpreted to be inner-bend levee deposits, are muddier and thinner than turbidites in the abandonment facies and have poor reservoir characteristics. This mudstone-rich facies occurs adjacent to channel fills and should be taken into account when evaluating levee deposits as potential reservoir targets. Muddy debrites and slump deposits are good stratigraphic markers within Isaac Channel 5 and make up the remaining 9% of the exposed section. These unstratified, mudstone-rich units have poor to no reservoir potential and very likely represent important impediments to subsurface fluid flow (barriers). Sandstone-rich channel-fill facies within each channel complex are locally interstatified with thin-bedded turbidites and slump deposits. Where present these fine-grained deposits do not extend across the full width of the outcrop. Composite channel fill sandstone within a discrete channel complex, therefore, forms a laterally and vertically contiguous reservoir unit interrupted locally by discontinuous (<500 m long) permeability baffles. Individual channel complexes, on the other hand, are vertically separated (compartimentalized) by laterally persistent muddy debrites and thin-bedded deposits that would constitute kilometer-scale barrier-type facies within a multi-layer reservoir (~ 100 m thick). Detailed facies characterization of this two-dimensional outcrop provides valuable insight into the geometry, continuity, and distribution of lithofacies at the scale of channel fills and channel-complexes in slope systems, in addition to an understanding of the lateral continuity and dimensions of potential barriers and baffles to fluid flow. This, in turn, may help improve the understanding of reservoir distribution, connectivity and performance in slope-channel reservoirs.
publishDate 2008
dc.date.none.fl_str_mv 2008
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/conferenceObject
Reunión
Book
http://purl.org/coar/resource_type/c_5794
info:ar-repo/semantics/documentoDeConferencia
status_str publishedVersion
format conferenceObject
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/237267
Detailed facies and architectural analysis of an ancient submarine (slope) channelised unit: Insights into reservoir distribution and connectivity; XII Reunión Argentina de Sedimentología; Ciudad Autónoma de Buenos Aires; Argentina; 2008; 168-168
978-987-96296-3-5
CONICET Digital
CONICET
url http://hdl.handle.net/11336/237267
identifier_str_mv Detailed facies and architectural analysis of an ancient submarine (slope) channelised unit: Insights into reservoir distribution and connectivity; XII Reunión Argentina de Sedimentología; Ciudad Autónoma de Buenos Aires; Argentina; 2008; 168-168
978-987-96296-3-5
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.sedimentologia.org.ar/spa/ras/
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.coverage.none.fl_str_mv Nacional
dc.publisher.none.fl_str_mv Asociación Argentina de Sedimentología
publisher.none.fl_str_mv Asociación Argentina de Sedimentología
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instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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