Diagenetic and geochemical studies of the Buchan Formation (Upper Devonian) in the Central North Sea

Abstract The Upper Devonian Buchan Formation reservoirs in the UK Central North Sea are litharenite/sublitharenite and were deposited in fluvial–aeolian settings. The grain-coating clays in the aeolian sandstones have effectively inhibited quartz overgrowth. Hence, the reduction of reservoir quality...

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Autores principales:	Long-Xun Tang, Jon Gluyas, Stuart Jones, Leon Bowen
Formato:	article
Lenguaje:	EN
Publicado:	KeAi Communications Co., Ltd. 2018
Materias:	Buchan Formation Upper Devonian Central North Sea Sandstone diagenesis Geochemistry methods Science Q Petrology QE420-499
Acceso en línea:	https://doaj.org/article/b2804b03f4b946038b1cbe444a6c6759
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spelling	oai:doaj.org-article:b2804b03f4b946038b1cbe444a6c67592021-12-02T00:17:38ZDiagenetic and geochemical studies of the Buchan Formation (Upper Devonian) in the Central North Sea10.1007/s12182-018-0232-31672-51071995-8226https://doaj.org/article/b2804b03f4b946038b1cbe444a6c67592018-05-01T00:00:00Zhttp://link.springer.com/article/10.1007/s12182-018-0232-3https://doaj.org/toc/1672-5107https://doaj.org/toc/1995-8226Abstract The Upper Devonian Buchan Formation reservoirs in the UK Central North Sea are litharenite/sublitharenite and were deposited in fluvial–aeolian settings. The grain-coating clays in the aeolian sandstones have effectively inhibited quartz overgrowth. Hence, the reduction of reservoir quality is mainly due to mechanical compaction and early dolomite precipitation in both fluvial and aeolian sandstones; quartz overgrowth and kaolinite illitization in fluvial sandstones; and limited smectite illitization in aeolian sandstones. The carbon/oxygen stable isotopes of dolomite cements suggest a predominantly marine carbon source and precipitation temperatures between 25 and 58 °C indicating a shallow burial depth during dolomite precipitation. The temperatures and the dolomite distribution indicate that the cements originated from the overlying Upper Permian Zechstein carbonates. Extensive quartz overgrowths formed at 80 and 120 °C in the late and deep diagenetic burial history. The most probable silica source was from feldspar kaolinitization and pressure dissolution of quartz grains. Through detailed petrography and geochemical analyses, the burial–paragenesis–thermal history of the Buchan Formation has been constructed. Similar diagenetic processes are likely to have occurred in the Buchan Formation in other parts of the Central and Northern North Sea. This study may allow new petroleum plays to be considered in areas previously thought to have poor hydrocarbon potential.Long-Xun TangJon GluyasStuart JonesLeon BowenKeAi Communications Co., Ltd.articleBuchan FormationUpper DevonianCentral North SeaSandstone diagenesisGeochemistry methodsScienceQPetrologyQE420-499ENPetroleum Science, Vol 15, Iss 2, Pp 211-229 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Buchan Formation Upper Devonian Central North Sea Sandstone diagenesis Geochemistry methods Science Q Petrology QE420-499
spellingShingle	Buchan Formation Upper Devonian Central North Sea Sandstone diagenesis Geochemistry methods Science Q Petrology QE420-499 Long-Xun Tang Jon Gluyas Stuart Jones Leon Bowen Diagenetic and geochemical studies of the Buchan Formation (Upper Devonian) in the Central North Sea
description	Abstract The Upper Devonian Buchan Formation reservoirs in the UK Central North Sea are litharenite/sublitharenite and were deposited in fluvial–aeolian settings. The grain-coating clays in the aeolian sandstones have effectively inhibited quartz overgrowth. Hence, the reduction of reservoir quality is mainly due to mechanical compaction and early dolomite precipitation in both fluvial and aeolian sandstones; quartz overgrowth and kaolinite illitization in fluvial sandstones; and limited smectite illitization in aeolian sandstones. The carbon/oxygen stable isotopes of dolomite cements suggest a predominantly marine carbon source and precipitation temperatures between 25 and 58 °C indicating a shallow burial depth during dolomite precipitation. The temperatures and the dolomite distribution indicate that the cements originated from the overlying Upper Permian Zechstein carbonates. Extensive quartz overgrowths formed at 80 and 120 °C in the late and deep diagenetic burial history. The most probable silica source was from feldspar kaolinitization and pressure dissolution of quartz grains. Through detailed petrography and geochemical analyses, the burial–paragenesis–thermal history of the Buchan Formation has been constructed. Similar diagenetic processes are likely to have occurred in the Buchan Formation in other parts of the Central and Northern North Sea. This study may allow new petroleum plays to be considered in areas previously thought to have poor hydrocarbon potential.
format	article
author	Long-Xun Tang Jon Gluyas Stuart Jones Leon Bowen
author_facet	Long-Xun Tang Jon Gluyas Stuart Jones Leon Bowen
author_sort	Long-Xun Tang
title	Diagenetic and geochemical studies of the Buchan Formation (Upper Devonian) in the Central North Sea
title_short	Diagenetic and geochemical studies of the Buchan Formation (Upper Devonian) in the Central North Sea
title_full	Diagenetic and geochemical studies of the Buchan Formation (Upper Devonian) in the Central North Sea
title_fullStr	Diagenetic and geochemical studies of the Buchan Formation (Upper Devonian) in the Central North Sea
title_full_unstemmed	Diagenetic and geochemical studies of the Buchan Formation (Upper Devonian) in the Central North Sea
title_sort	diagenetic and geochemical studies of the buchan formation (upper devonian) in the central north sea
publisher	KeAi Communications Co., Ltd.
publishDate	2018
url	https://doaj.org/article/b2804b03f4b946038b1cbe444a6c6759
work_keys_str_mv	AT longxuntang diageneticandgeochemicalstudiesofthebuchanformationupperdevonianinthecentralnorthsea AT jongluyas diageneticandgeochemicalstudiesofthebuchanformationupperdevonianinthecentralnorthsea AT stuartjones diageneticandgeochemicalstudiesofthebuchanformationupperdevonianinthecentralnorthsea AT leonbowen diageneticandgeochemicalstudiesofthebuchanformationupperdevonianinthecentralnorthsea
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Diagenetic and geochemical studies of the Buchan Formation (Upper Devonian) in the Central North Sea

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