Origin of carbonate cements in deep sandstone reservoirs and its significance for hydrocarbon indication: A case of Shahejie Formation in Dongying Sag

Carbonate cements are primary cement types formed in deep sandstone reservoirs of Dongying Sag. We have proposed three stages of carbonate cements with different origin and material sources: carbonate cements in early stage are rim-shaped high-Mg calcite, which is the product of quasi-contemporaneou...

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Autores principales:	Zhang Tianjiao, Feng Yuelin, Ge Xinmin, Meng Wei, Han Hongwei, Yu Jingqiang, Zhang Weizhong, Li Shuli, Li Xiaochen, Gao Ping
Formato:	article
Lenguaje:	EN
Publicado:	De Gruyter 2021
Materias:	dongying sag material sources carbonate cements hydrocarbon charging Geology QE1-996.5
Acceso en línea:	https://doaj.org/article/1dad76f0f81a412ea8360799cc3adbb7
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id	oai:doaj.org-article:1dad76f0f81a412ea8360799cc3adbb7
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spelling	oai:doaj.org-article:1dad76f0f81a412ea8360799cc3adbb72021-12-05T14:10:49ZOrigin of carbonate cements in deep sandstone reservoirs and its significance for hydrocarbon indication: A case of Shahejie Formation in Dongying Sag2391-544710.1515/geo-2020-0283https://doaj.org/article/1dad76f0f81a412ea8360799cc3adbb72021-11-01T00:00:00Zhttps://doi.org/10.1515/geo-2020-0283https://doaj.org/toc/2391-5447Carbonate cements are primary cement types formed in deep sandstone reservoirs of Dongying Sag. We have proposed three stages of carbonate cements with different origin and material sources: carbonate cements in early stage are rim-shaped high-Mg calcite, which is the product of quasi-contemporaneous period; and calcite filled with primary pores without obvious compaction and diagenetic transformation is mudstone compaction during the drainage process. Carbonate cements in middle stage are calcite and dolomite filled with feldspar secondary dissolved pores. The rich Ca2+, Mg2+, and CO32−{\text{CO}}_{3}^{2-} in overpressure fluid enter the reservoir and mix with Ca2+ in the original formation water. Carbonate cements in late stage are ferrocalcite and ankerite that filled the dissolution pores of early- and middle-stage carbonate cements. They were products of CO32−{\text{CO}}_{3}^{2-} formed by organic acid splitting decomposition in late diagenesis and CO32−{\text{CO}}_{3}^{2-} formed by dissolution of carbonate cements in early and middle stages, combined with Mg2+, Ca2+, Fe2+ plasma in pore fluid. Dissolution–reprecipitation of the lacustrine carbonate rocks is responsible for obvious positive drift in the δ 13CPDB‰ values of carbonate cements. Carbonate cements in middle stage and late stage, respectively, represent the early hydrocarbon charging of Dongying Formation and the end of Guantao Formation to the present.Zhang TianjiaoFeng YuelinGe XinminMeng WeiHan HongweiYu JingqiangZhang WeizhongLi ShuliLi XiaochenGao PingDe Gruyterarticledongying sagmaterial sourcescarbonate cementshydrocarbon chargingGeologyQE1-996.5ENOpen Geosciences, Vol 13, Iss 1, Pp 1375-1394 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	dongying sag material sources carbonate cements hydrocarbon charging Geology QE1-996.5
spellingShingle	dongying sag material sources carbonate cements hydrocarbon charging Geology QE1-996.5 Zhang Tianjiao Feng Yuelin Ge Xinmin Meng Wei Han Hongwei Yu Jingqiang Zhang Weizhong Li Shuli Li Xiaochen Gao Ping Origin of carbonate cements in deep sandstone reservoirs and its significance for hydrocarbon indication: A case of Shahejie Formation in Dongying Sag
description	Carbonate cements are primary cement types formed in deep sandstone reservoirs of Dongying Sag. We have proposed three stages of carbonate cements with different origin and material sources: carbonate cements in early stage are rim-shaped high-Mg calcite, which is the product of quasi-contemporaneous period; and calcite filled with primary pores without obvious compaction and diagenetic transformation is mudstone compaction during the drainage process. Carbonate cements in middle stage are calcite and dolomite filled with feldspar secondary dissolved pores. The rich Ca2+, Mg2+, and CO32−{\text{CO}}_{3}^{2-} in overpressure fluid enter the reservoir and mix with Ca2+ in the original formation water. Carbonate cements in late stage are ferrocalcite and ankerite that filled the dissolution pores of early- and middle-stage carbonate cements. They were products of CO32−{\text{CO}}_{3}^{2-} formed by organic acid splitting decomposition in late diagenesis and CO32−{\text{CO}}_{3}^{2-} formed by dissolution of carbonate cements in early and middle stages, combined with Mg2+, Ca2+, Fe2+ plasma in pore fluid. Dissolution–reprecipitation of the lacustrine carbonate rocks is responsible for obvious positive drift in the δ 13CPDB‰ values of carbonate cements. Carbonate cements in middle stage and late stage, respectively, represent the early hydrocarbon charging of Dongying Formation and the end of Guantao Formation to the present.
format	article
author	Zhang Tianjiao Feng Yuelin Ge Xinmin Meng Wei Han Hongwei Yu Jingqiang Zhang Weizhong Li Shuli Li Xiaochen Gao Ping
author_facet	Zhang Tianjiao Feng Yuelin Ge Xinmin Meng Wei Han Hongwei Yu Jingqiang Zhang Weizhong Li Shuli Li Xiaochen Gao Ping
author_sort	Zhang Tianjiao
title	Origin of carbonate cements in deep sandstone reservoirs and its significance for hydrocarbon indication: A case of Shahejie Formation in Dongying Sag
title_short	Origin of carbonate cements in deep sandstone reservoirs and its significance for hydrocarbon indication: A case of Shahejie Formation in Dongying Sag
title_full	Origin of carbonate cements in deep sandstone reservoirs and its significance for hydrocarbon indication: A case of Shahejie Formation in Dongying Sag
title_fullStr	Origin of carbonate cements in deep sandstone reservoirs and its significance for hydrocarbon indication: A case of Shahejie Formation in Dongying Sag
title_full_unstemmed	Origin of carbonate cements in deep sandstone reservoirs and its significance for hydrocarbon indication: A case of Shahejie Formation in Dongying Sag
title_sort	origin of carbonate cements in deep sandstone reservoirs and its significance for hydrocarbon indication: a case of shahejie formation in dongying sag
publisher	De Gruyter
publishDate	2021
url	https://doaj.org/article/1dad76f0f81a412ea8360799cc3adbb7
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Origin of carbonate cements in deep sandstone reservoirs and its significance for hydrocarbon indication: A case of Shahejie Formation in Dongying Sag

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