Reservoir Quality of Upper Jurassic Corallian Sandstones, Weald Basin, UK

The Upper Jurassic, shallow marine Corallian sandstones of the Weald Basin, UK, are significant onshore reservoirs due to their future potential for carbon capture and storage (CCS) and hydrogen storage. These reservoir rocks, buried to no deeper than 1700 m before uplift to 850 to 900 m at the pres...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Dinfa Vincent Barshep, Richard Henry Worden
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	Corallian sandstones reservoir quality bioclastic sandstones early carbonate cementation shallow reservoirs berthierine grain-coats Geology QE1-996.5
Acceso en línea:	https://doaj.org/article/e3c4331d8dd143b680bc79316b6be6ed
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:e3c4331d8dd143b680bc79316b6be6ed
record_format	dspace
spelling	oai:doaj.org-article:e3c4331d8dd143b680bc79316b6be6ed2021-11-25T17:42:48ZReservoir Quality of Upper Jurassic Corallian Sandstones, Weald Basin, UK10.3390/geosciences111104462076-3263https://doaj.org/article/e3c4331d8dd143b680bc79316b6be6ed2021-10-01T00:00:00Zhttps://www.mdpi.com/2076-3263/11/11/446https://doaj.org/toc/2076-3263The Upper Jurassic, shallow marine Corallian sandstones of the Weald Basin, UK, are significant onshore reservoirs due to their future potential for carbon capture and storage (CCS) and hydrogen storage. These reservoir rocks, buried to no deeper than 1700 m before uplift to 850 to 900 m at the present time, also provide an opportunity to study the pivotal role of shallow marine sandstone eodiagenesis. With little evidence of compaction, these rocks show low to moderate porosity for their relatively shallow burial depths. Their porosity ranges from 0.8 to 30% with an average of 12.6% and permeability range from 0.01 to 887 mD with an average of 31 mD. The Corallian sandstones of the Weald Basin are relatively poorly studied; consequently, there is a paucity of data on their reservoir quality which limits any ability to predict porosity and permeability away from wells. This study presents a potential first in the examination of diagenetic controls of reservoir quality of the Corallian sandstones, of the Weald Basin’s Palmers Wood and Bletchingley oil fields, using a combination of core analysis, sedimentary core logs, petrography, wireline analysis, SEM-EDS analysis and geochemical analysis to understand the extent of diagenetic evolution of the sandstones and its effects on reservoir quality. The analyses show a dominant quartz arenite lithology with minor feldspars, bioclasts, Fe-ooids and extra-basinal lithic grains. We conclude that little compactional porosity-loss occurred with cementation being the main process that caused porosity-loss. Early calcite cement, from neomorphism of contemporaneously deposited bioclasts, represents the majority of the early cement, which subsequently prevented mechanical compaction. Calcite cement is also interpreted to have formed during burial from decarboxylation-derived CO<sub>2</sub> during source rock maturation. Other cements include the Fe-clay berthierine, apatite, pyrite, dolomite, siderite, quartz, illite and kaolinite. Reservoir quality in the Corallian sandstones show no significant depositional textural controls; it was reduced by dominant calcite cementation, locally preserved by berthierine grain coats that inhibited quartz cement and enhanced by detrital grain dissolution as well as cement dissolution. Reservoir quality in the Corallian sandstones can therefore be predicted by considering abundance of calcite cement from bioclasts, organically derived CO<sub>2</sub> and Fe-clay coats.Dinfa Vincent BarshepRichard Henry WordenMDPI AGarticleCorallian sandstonesreservoir qualitybioclastic sandstonesearly carbonate cementationshallow reservoirsberthierine grain-coatsGeologyQE1-996.5ENGeosciences, Vol 11, Iss 446, p 446 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Corallian sandstones reservoir quality bioclastic sandstones early carbonate cementation shallow reservoirs berthierine grain-coats Geology QE1-996.5
spellingShingle	Corallian sandstones reservoir quality bioclastic sandstones early carbonate cementation shallow reservoirs berthierine grain-coats Geology QE1-996.5 Dinfa Vincent Barshep Richard Henry Worden Reservoir Quality of Upper Jurassic Corallian Sandstones, Weald Basin, UK
description	The Upper Jurassic, shallow marine Corallian sandstones of the Weald Basin, UK, are significant onshore reservoirs due to their future potential for carbon capture and storage (CCS) and hydrogen storage. These reservoir rocks, buried to no deeper than 1700 m before uplift to 850 to 900 m at the present time, also provide an opportunity to study the pivotal role of shallow marine sandstone eodiagenesis. With little evidence of compaction, these rocks show low to moderate porosity for their relatively shallow burial depths. Their porosity ranges from 0.8 to 30% with an average of 12.6% and permeability range from 0.01 to 887 mD with an average of 31 mD. The Corallian sandstones of the Weald Basin are relatively poorly studied; consequently, there is a paucity of data on their reservoir quality which limits any ability to predict porosity and permeability away from wells. This study presents a potential first in the examination of diagenetic controls of reservoir quality of the Corallian sandstones, of the Weald Basin’s Palmers Wood and Bletchingley oil fields, using a combination of core analysis, sedimentary core logs, petrography, wireline analysis, SEM-EDS analysis and geochemical analysis to understand the extent of diagenetic evolution of the sandstones and its effects on reservoir quality. The analyses show a dominant quartz arenite lithology with minor feldspars, bioclasts, Fe-ooids and extra-basinal lithic grains. We conclude that little compactional porosity-loss occurred with cementation being the main process that caused porosity-loss. Early calcite cement, from neomorphism of contemporaneously deposited bioclasts, represents the majority of the early cement, which subsequently prevented mechanical compaction. Calcite cement is also interpreted to have formed during burial from decarboxylation-derived CO<sub>2</sub> during source rock maturation. Other cements include the Fe-clay berthierine, apatite, pyrite, dolomite, siderite, quartz, illite and kaolinite. Reservoir quality in the Corallian sandstones show no significant depositional textural controls; it was reduced by dominant calcite cementation, locally preserved by berthierine grain coats that inhibited quartz cement and enhanced by detrital grain dissolution as well as cement dissolution. Reservoir quality in the Corallian sandstones can therefore be predicted by considering abundance of calcite cement from bioclasts, organically derived CO<sub>2</sub> and Fe-clay coats.
format	article
author	Dinfa Vincent Barshep Richard Henry Worden
author_facet	Dinfa Vincent Barshep Richard Henry Worden
author_sort	Dinfa Vincent Barshep
title	Reservoir Quality of Upper Jurassic Corallian Sandstones, Weald Basin, UK
title_short	Reservoir Quality of Upper Jurassic Corallian Sandstones, Weald Basin, UK
title_full	Reservoir Quality of Upper Jurassic Corallian Sandstones, Weald Basin, UK
title_fullStr	Reservoir Quality of Upper Jurassic Corallian Sandstones, Weald Basin, UK
title_full_unstemmed	Reservoir Quality of Upper Jurassic Corallian Sandstones, Weald Basin, UK
title_sort	reservoir quality of upper jurassic corallian sandstones, weald basin, uk
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/e3c4331d8dd143b680bc79316b6be6ed
work_keys_str_mv	AT dinfavincentbarshep reservoirqualityofupperjurassiccoralliansandstoneswealdbasinuk AT richardhenryworden reservoirqualityofupperjurassiccoralliansandstoneswealdbasinuk
_version_	1718412078974238720

Reservoir Quality of Upper Jurassic Corallian Sandstones, Weald Basin, UK

Ejemplares similares