Secondary anhydrites in deeply buried Devonian carbonates of the Alberta Basin, Canada
Abstract Observations from about 500 drill cores from Devonian reefs and carbonate platforms in the Alberta Basin, Canada, reveal that the Upper Devonian strata across this basin contain about 20 petrographically distinct types of anhydrite that can be placed into two groups: ‘primary’ and ‘secondar...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Machel, Hans G. [verfasserIn] |
|---|
| Format: |
Artikel |
|---|---|
| Sprache: |
Englisch |
| Erschienen: |
2013 |
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| Schlagwörter: |
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| Anmerkung: |
© Springer-Verlag Berlin Heidelberg 2013 |
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| Übergeordnetes Werk: |
Enthalten in: Carbonates and evaporites - Springer Berlin Heidelberg, 1986, 28(2013), 3 vom: 30. Jan., Seite 267-280 |
|---|---|
| Übergeordnetes Werk: |
volume:28 ; year:2013 ; number:3 ; day:30 ; month:01 ; pages:267-280 |
| Links: |
|---|
| DOI / URN: |
10.1007/s13146-012-0123-4 |
|---|
| Katalog-ID: |
OLC2076501347 |
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| 520 | |a Abstract Observations from about 500 drill cores from Devonian reefs and carbonate platforms in the Alberta Basin, Canada, reveal that the Upper Devonian strata across this basin contain about 20 petrographically distinct types of anhydrite that can be placed into two groups: ‘primary’ and ‘secondary’ anhydrites. ‘Primary’ anhydrites formed syndepositionally in essentially unlithified sediments, either directly from evaporitic brines or within a few years to perhaps hundreds of years during very shallow burial (centimeters to meters). In contrast, ‘secondary’ anhydrites formed in essentially lithified sediments at burial depths of meters to thousands of meters. Some secondary anhydrites formed from gypsum at depths of less than about 600–1,100 m, others formed directly as anhydrite at greater depths. Some remobilized anhydrite invaded sour gas fields in which anhydrite had been removed previously by thermochemical sulfate reduction. In the Leduc, Swan Hills, and Nisku reefs and platform carbonates of the Alberta subsurface, and in the strata surrounding these carbonates, no primary anhydrites have been found. Rather, a few types of secondary anhydrite predominate. The sources appear to be threefold: (1) brines migrating from Middle to Late Devonian evaporite-bearing strata; (2) seawater and mesohaline brines that formed gypsum and/or anhydrite as a by-product of dolomitization; (3) redistribution of both primary and secondary anhydrites, in some cases demonstrably after maximum burial and sour gas formation. These findings are of interest to the petroleum industry because anhydrites often reduce porosity and permeability significantly. | ||
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10.1007/s13146-012-0123-4 doi (DE-627)OLC2076501347 (DE-He213)s13146-012-0123-4-p DE-627 ger DE-627 rakwb eng 550 VZ 550 VZ 13 ssgn Machel, Hans G. verfasserin aut Secondary anhydrites in deeply buried Devonian carbonates of the Alberta Basin, Canada 2013 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag Berlin Heidelberg 2013 Abstract Observations from about 500 drill cores from Devonian reefs and carbonate platforms in the Alberta Basin, Canada, reveal that the Upper Devonian strata across this basin contain about 20 petrographically distinct types of anhydrite that can be placed into two groups: ‘primary’ and ‘secondary’ anhydrites. ‘Primary’ anhydrites formed syndepositionally in essentially unlithified sediments, either directly from evaporitic brines or within a few years to perhaps hundreds of years during very shallow burial (centimeters to meters). In contrast, ‘secondary’ anhydrites formed in essentially lithified sediments at burial depths of meters to thousands of meters. Some secondary anhydrites formed from gypsum at depths of less than about 600–1,100 m, others formed directly as anhydrite at greater depths. Some remobilized anhydrite invaded sour gas fields in which anhydrite had been removed previously by thermochemical sulfate reduction. In the Leduc, Swan Hills, and Nisku reefs and platform carbonates of the Alberta subsurface, and in the strata surrounding these carbonates, no primary anhydrites have been found. Rather, a few types of secondary anhydrite predominate. The sources appear to be threefold: (1) brines migrating from Middle to Late Devonian evaporite-bearing strata; (2) seawater and mesohaline brines that formed gypsum and/or anhydrite as a by-product of dolomitization; (3) redistribution of both primary and secondary anhydrites, in some cases demonstrably after maximum burial and sour gas formation. These findings are of interest to the petroleum industry because anhydrites often reduce porosity and permeability significantly. Anhydrite Devonian Alberta Petroleum reservoirs Enthalten in Carbonates and evaporites Springer Berlin Heidelberg, 1986 28(2013), 3 vom: 30. Jan., Seite 267-280 (DE-627)165666978 (DE-600)1037732-3 (DE-576)09095369X 0891-2556 nnns volume:28 year:2013 number:3 day:30 month:01 pages:267-280 https://doi.org/10.1007/s13146-012-0123-4 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GGO GBV_ILN_40 GBV_ILN_267 GBV_ILN_2018 GBV_ILN_2027 GBV_ILN_4277 AR 28 2013 3 30 01 267-280 |
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10.1007/s13146-012-0123-4 doi (DE-627)OLC2076501347 (DE-He213)s13146-012-0123-4-p DE-627 ger DE-627 rakwb eng 550 VZ 550 VZ 13 ssgn Machel, Hans G. verfasserin aut Secondary anhydrites in deeply buried Devonian carbonates of the Alberta Basin, Canada 2013 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag Berlin Heidelberg 2013 Abstract Observations from about 500 drill cores from Devonian reefs and carbonate platforms in the Alberta Basin, Canada, reveal that the Upper Devonian strata across this basin contain about 20 petrographically distinct types of anhydrite that can be placed into two groups: ‘primary’ and ‘secondary’ anhydrites. ‘Primary’ anhydrites formed syndepositionally in essentially unlithified sediments, either directly from evaporitic brines or within a few years to perhaps hundreds of years during very shallow burial (centimeters to meters). In contrast, ‘secondary’ anhydrites formed in essentially lithified sediments at burial depths of meters to thousands of meters. Some secondary anhydrites formed from gypsum at depths of less than about 600–1,100 m, others formed directly as anhydrite at greater depths. Some remobilized anhydrite invaded sour gas fields in which anhydrite had been removed previously by thermochemical sulfate reduction. In the Leduc, Swan Hills, and Nisku reefs and platform carbonates of the Alberta subsurface, and in the strata surrounding these carbonates, no primary anhydrites have been found. Rather, a few types of secondary anhydrite predominate. The sources appear to be threefold: (1) brines migrating from Middle to Late Devonian evaporite-bearing strata; (2) seawater and mesohaline brines that formed gypsum and/or anhydrite as a by-product of dolomitization; (3) redistribution of both primary and secondary anhydrites, in some cases demonstrably after maximum burial and sour gas formation. These findings are of interest to the petroleum industry because anhydrites often reduce porosity and permeability significantly. Anhydrite Devonian Alberta Petroleum reservoirs Enthalten in Carbonates and evaporites Springer Berlin Heidelberg, 1986 28(2013), 3 vom: 30. Jan., Seite 267-280 (DE-627)165666978 (DE-600)1037732-3 (DE-576)09095369X 0891-2556 nnns volume:28 year:2013 number:3 day:30 month:01 pages:267-280 https://doi.org/10.1007/s13146-012-0123-4 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GGO GBV_ILN_40 GBV_ILN_267 GBV_ILN_2018 GBV_ILN_2027 GBV_ILN_4277 AR 28 2013 3 30 01 267-280 |
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10.1007/s13146-012-0123-4 doi (DE-627)OLC2076501347 (DE-He213)s13146-012-0123-4-p DE-627 ger DE-627 rakwb eng 550 VZ 550 VZ 13 ssgn Machel, Hans G. verfasserin aut Secondary anhydrites in deeply buried Devonian carbonates of the Alberta Basin, Canada 2013 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag Berlin Heidelberg 2013 Abstract Observations from about 500 drill cores from Devonian reefs and carbonate platforms in the Alberta Basin, Canada, reveal that the Upper Devonian strata across this basin contain about 20 petrographically distinct types of anhydrite that can be placed into two groups: ‘primary’ and ‘secondary’ anhydrites. ‘Primary’ anhydrites formed syndepositionally in essentially unlithified sediments, either directly from evaporitic brines or within a few years to perhaps hundreds of years during very shallow burial (centimeters to meters). In contrast, ‘secondary’ anhydrites formed in essentially lithified sediments at burial depths of meters to thousands of meters. Some secondary anhydrites formed from gypsum at depths of less than about 600–1,100 m, others formed directly as anhydrite at greater depths. Some remobilized anhydrite invaded sour gas fields in which anhydrite had been removed previously by thermochemical sulfate reduction. In the Leduc, Swan Hills, and Nisku reefs and platform carbonates of the Alberta subsurface, and in the strata surrounding these carbonates, no primary anhydrites have been found. Rather, a few types of secondary anhydrite predominate. The sources appear to be threefold: (1) brines migrating from Middle to Late Devonian evaporite-bearing strata; (2) seawater and mesohaline brines that formed gypsum and/or anhydrite as a by-product of dolomitization; (3) redistribution of both primary and secondary anhydrites, in some cases demonstrably after maximum burial and sour gas formation. These findings are of interest to the petroleum industry because anhydrites often reduce porosity and permeability significantly. Anhydrite Devonian Alberta Petroleum reservoirs Enthalten in Carbonates and evaporites Springer Berlin Heidelberg, 1986 28(2013), 3 vom: 30. Jan., Seite 267-280 (DE-627)165666978 (DE-600)1037732-3 (DE-576)09095369X 0891-2556 nnns volume:28 year:2013 number:3 day:30 month:01 pages:267-280 https://doi.org/10.1007/s13146-012-0123-4 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GGO GBV_ILN_40 GBV_ILN_267 GBV_ILN_2018 GBV_ILN_2027 GBV_ILN_4277 AR 28 2013 3 30 01 267-280 |
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10.1007/s13146-012-0123-4 doi (DE-627)OLC2076501347 (DE-He213)s13146-012-0123-4-p DE-627 ger DE-627 rakwb eng 550 VZ 550 VZ 13 ssgn Machel, Hans G. verfasserin aut Secondary anhydrites in deeply buried Devonian carbonates of the Alberta Basin, Canada 2013 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag Berlin Heidelberg 2013 Abstract Observations from about 500 drill cores from Devonian reefs and carbonate platforms in the Alberta Basin, Canada, reveal that the Upper Devonian strata across this basin contain about 20 petrographically distinct types of anhydrite that can be placed into two groups: ‘primary’ and ‘secondary’ anhydrites. ‘Primary’ anhydrites formed syndepositionally in essentially unlithified sediments, either directly from evaporitic brines or within a few years to perhaps hundreds of years during very shallow burial (centimeters to meters). In contrast, ‘secondary’ anhydrites formed in essentially lithified sediments at burial depths of meters to thousands of meters. Some secondary anhydrites formed from gypsum at depths of less than about 600–1,100 m, others formed directly as anhydrite at greater depths. Some remobilized anhydrite invaded sour gas fields in which anhydrite had been removed previously by thermochemical sulfate reduction. In the Leduc, Swan Hills, and Nisku reefs and platform carbonates of the Alberta subsurface, and in the strata surrounding these carbonates, no primary anhydrites have been found. Rather, a few types of secondary anhydrite predominate. The sources appear to be threefold: (1) brines migrating from Middle to Late Devonian evaporite-bearing strata; (2) seawater and mesohaline brines that formed gypsum and/or anhydrite as a by-product of dolomitization; (3) redistribution of both primary and secondary anhydrites, in some cases demonstrably after maximum burial and sour gas formation. These findings are of interest to the petroleum industry because anhydrites often reduce porosity and permeability significantly. Anhydrite Devonian Alberta Petroleum reservoirs Enthalten in Carbonates and evaporites Springer Berlin Heidelberg, 1986 28(2013), 3 vom: 30. Jan., Seite 267-280 (DE-627)165666978 (DE-600)1037732-3 (DE-576)09095369X 0891-2556 nnns volume:28 year:2013 number:3 day:30 month:01 pages:267-280 https://doi.org/10.1007/s13146-012-0123-4 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GGO GBV_ILN_40 GBV_ILN_267 GBV_ILN_2018 GBV_ILN_2027 GBV_ILN_4277 AR 28 2013 3 30 01 267-280 |
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Secondary anhydrites in deeply buried Devonian carbonates of the Alberta Basin, Canada |
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| title_full |
Secondary anhydrites in deeply buried Devonian carbonates of the Alberta Basin, Canada |
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Machel, Hans G. |
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Carbonates and evaporites |
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Carbonates and evaporites |
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eng |
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500 - Science |
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marc |
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2013 |
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txt |
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267 |
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Machel, Hans G. |
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Machel, Hans G. |
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10.1007/s13146-012-0123-4 |
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550 |
| title_sort |
secondary anhydrites in deeply buried devonian carbonates of the alberta basin, canada |
| title_auth |
Secondary anhydrites in deeply buried Devonian carbonates of the Alberta Basin, Canada |
| abstract |
Abstract Observations from about 500 drill cores from Devonian reefs and carbonate platforms in the Alberta Basin, Canada, reveal that the Upper Devonian strata across this basin contain about 20 petrographically distinct types of anhydrite that can be placed into two groups: ‘primary’ and ‘secondary’ anhydrites. ‘Primary’ anhydrites formed syndepositionally in essentially unlithified sediments, either directly from evaporitic brines or within a few years to perhaps hundreds of years during very shallow burial (centimeters to meters). In contrast, ‘secondary’ anhydrites formed in essentially lithified sediments at burial depths of meters to thousands of meters. Some secondary anhydrites formed from gypsum at depths of less than about 600–1,100 m, others formed directly as anhydrite at greater depths. Some remobilized anhydrite invaded sour gas fields in which anhydrite had been removed previously by thermochemical sulfate reduction. In the Leduc, Swan Hills, and Nisku reefs and platform carbonates of the Alberta subsurface, and in the strata surrounding these carbonates, no primary anhydrites have been found. Rather, a few types of secondary anhydrite predominate. The sources appear to be threefold: (1) brines migrating from Middle to Late Devonian evaporite-bearing strata; (2) seawater and mesohaline brines that formed gypsum and/or anhydrite as a by-product of dolomitization; (3) redistribution of both primary and secondary anhydrites, in some cases demonstrably after maximum burial and sour gas formation. These findings are of interest to the petroleum industry because anhydrites often reduce porosity and permeability significantly. © Springer-Verlag Berlin Heidelberg 2013 |
| abstractGer |
Abstract Observations from about 500 drill cores from Devonian reefs and carbonate platforms in the Alberta Basin, Canada, reveal that the Upper Devonian strata across this basin contain about 20 petrographically distinct types of anhydrite that can be placed into two groups: ‘primary’ and ‘secondary’ anhydrites. ‘Primary’ anhydrites formed syndepositionally in essentially unlithified sediments, either directly from evaporitic brines or within a few years to perhaps hundreds of years during very shallow burial (centimeters to meters). In contrast, ‘secondary’ anhydrites formed in essentially lithified sediments at burial depths of meters to thousands of meters. Some secondary anhydrites formed from gypsum at depths of less than about 600–1,100 m, others formed directly as anhydrite at greater depths. Some remobilized anhydrite invaded sour gas fields in which anhydrite had been removed previously by thermochemical sulfate reduction. In the Leduc, Swan Hills, and Nisku reefs and platform carbonates of the Alberta subsurface, and in the strata surrounding these carbonates, no primary anhydrites have been found. Rather, a few types of secondary anhydrite predominate. The sources appear to be threefold: (1) brines migrating from Middle to Late Devonian evaporite-bearing strata; (2) seawater and mesohaline brines that formed gypsum and/or anhydrite as a by-product of dolomitization; (3) redistribution of both primary and secondary anhydrites, in some cases demonstrably after maximum burial and sour gas formation. These findings are of interest to the petroleum industry because anhydrites often reduce porosity and permeability significantly. © Springer-Verlag Berlin Heidelberg 2013 |
| abstract_unstemmed |
Abstract Observations from about 500 drill cores from Devonian reefs and carbonate platforms in the Alberta Basin, Canada, reveal that the Upper Devonian strata across this basin contain about 20 petrographically distinct types of anhydrite that can be placed into two groups: ‘primary’ and ‘secondary’ anhydrites. ‘Primary’ anhydrites formed syndepositionally in essentially unlithified sediments, either directly from evaporitic brines or within a few years to perhaps hundreds of years during very shallow burial (centimeters to meters). In contrast, ‘secondary’ anhydrites formed in essentially lithified sediments at burial depths of meters to thousands of meters. Some secondary anhydrites formed from gypsum at depths of less than about 600–1,100 m, others formed directly as anhydrite at greater depths. Some remobilized anhydrite invaded sour gas fields in which anhydrite had been removed previously by thermochemical sulfate reduction. In the Leduc, Swan Hills, and Nisku reefs and platform carbonates of the Alberta subsurface, and in the strata surrounding these carbonates, no primary anhydrites have been found. Rather, a few types of secondary anhydrite predominate. The sources appear to be threefold: (1) brines migrating from Middle to Late Devonian evaporite-bearing strata; (2) seawater and mesohaline brines that formed gypsum and/or anhydrite as a by-product of dolomitization; (3) redistribution of both primary and secondary anhydrites, in some cases demonstrably after maximum burial and sour gas formation. These findings are of interest to the petroleum industry because anhydrites often reduce porosity and permeability significantly. © Springer-Verlag Berlin Heidelberg 2013 |
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3 |
| title_short |
Secondary anhydrites in deeply buried Devonian carbonates of the Alberta Basin, Canada |
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https://doi.org/10.1007/s13146-012-0123-4 |
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