Pore size distribution, their geometry and connectivity in deeply buried Paleogene Es1 sandstone reservoir, Nanpu Sag, East China

Abstract The study of pore characteristics is of great importance in reservoir evaluation, especially in deeply buried sandstone. It controls the storage mechanism and reservoir fluid properties of the permeable horizons. The first member of Eocene Shahejie Formation (Es1) sandstone is classified as...

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Autores principales:	Muhammad Kashif, Yingchang Cao, Guanghui Yuan, Muhammad Asif, Kamran Javed, Jose Nicanor Mendez, Danish Khan, Lin Miruo
Formato:	article
Lenguaje:	EN
Publicado:	KeAi Communications Co., Ltd. 2019
Materias:	Reservoir rock Pore characteristics Pore size distribution Pore throat Porosity Permeability Science Q Petrology QE420-499
Acceso en línea:	https://doaj.org/article/973a41cd187b4084a3c80532d328f0d6
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spelling	oai:doaj.org-article:973a41cd187b4084a3c80532d328f0d62021-12-02T10:22:49ZPore size distribution, their geometry and connectivity in deeply buried Paleogene Es1 sandstone reservoir, Nanpu Sag, East China10.1007/s12182-019-00375-31672-51071995-8226https://doaj.org/article/973a41cd187b4084a3c80532d328f0d62019-09-01T00:00:00Zhttp://link.springer.com/article/10.1007/s12182-019-00375-3https://doaj.org/toc/1672-5107https://doaj.org/toc/1995-8226Abstract The study of pore characteristics is of great importance in reservoir evaluation, especially in deeply buried sandstone. It controls the storage mechanism and reservoir fluid properties of the permeable horizons. The first member of Eocene Shahejie Formation (Es1) sandstone is classified as feldspathic litharenite and lithic arkose. The present research investigates the pore characteristics and reservoir features of the deeply buried sandstone reservoir of Es1 member of Shahejie Formation. The techniques including thin-section petrography, mercury injection capillary pressure (MICP), scanning electron microscopy and laser scanning confocal microscope images were used to demarcate the pores including primary intergranular pores and secondary intergranular, intragranular, dissolution and fracture pores. Mercury injection test and routine core analysis were led to demarcate the pore network characteristics of the studied reservoir. Pore size and pore throat size distribution are acquired from mercury injection test. Porosity values range from 0.5% to 30%, and permeability ranges 0.006–7000 mD. Pore radii of coarse-grained sandstone and fine-grained sandstone range from 0.2 to > 4 µm and 1 nm to 1.60 µm, respectively, by MICP analysis. The mineral composition also plays an important role in protecting the pores with pressure from failure. Fractured sandstone and coarse-grained sandstone consist of large and interconnected pores that enhance the reservoir porosity and permeability, whereas fine-grained sandstone and siltstone consist of numerous pores but not well interconnected, and so they consist of high porosity with low permeability.Muhammad KashifYingchang CaoGuanghui YuanMuhammad AsifKamran JavedJose Nicanor MendezDanish KhanLin MiruoKeAi Communications Co., Ltd.articleReservoir rockPore characteristicsPore size distributionPore throatPorosityPermeabilityScienceQPetrologyQE420-499ENPetroleum Science, Vol 16, Iss 5, Pp 981-1000 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	Reservoir rock Pore characteristics Pore size distribution Pore throat Porosity Permeability Science Q Petrology QE420-499
spellingShingle	Reservoir rock Pore characteristics Pore size distribution Pore throat Porosity Permeability Science Q Petrology QE420-499 Muhammad Kashif Yingchang Cao Guanghui Yuan Muhammad Asif Kamran Javed Jose Nicanor Mendez Danish Khan Lin Miruo Pore size distribution, their geometry and connectivity in deeply buried Paleogene Es1 sandstone reservoir, Nanpu Sag, East China
description	Abstract The study of pore characteristics is of great importance in reservoir evaluation, especially in deeply buried sandstone. It controls the storage mechanism and reservoir fluid properties of the permeable horizons. The first member of Eocene Shahejie Formation (Es1) sandstone is classified as feldspathic litharenite and lithic arkose. The present research investigates the pore characteristics and reservoir features of the deeply buried sandstone reservoir of Es1 member of Shahejie Formation. The techniques including thin-section petrography, mercury injection capillary pressure (MICP), scanning electron microscopy and laser scanning confocal microscope images were used to demarcate the pores including primary intergranular pores and secondary intergranular, intragranular, dissolution and fracture pores. Mercury injection test and routine core analysis were led to demarcate the pore network characteristics of the studied reservoir. Pore size and pore throat size distribution are acquired from mercury injection test. Porosity values range from 0.5% to 30%, and permeability ranges 0.006–7000 mD. Pore radii of coarse-grained sandstone and fine-grained sandstone range from 0.2 to > 4 µm and 1 nm to 1.60 µm, respectively, by MICP analysis. The mineral composition also plays an important role in protecting the pores with pressure from failure. Fractured sandstone and coarse-grained sandstone consist of large and interconnected pores that enhance the reservoir porosity and permeability, whereas fine-grained sandstone and siltstone consist of numerous pores but not well interconnected, and so they consist of high porosity with low permeability.
format	article
author	Muhammad Kashif Yingchang Cao Guanghui Yuan Muhammad Asif Kamran Javed Jose Nicanor Mendez Danish Khan Lin Miruo
author_facet	Muhammad Kashif Yingchang Cao Guanghui Yuan Muhammad Asif Kamran Javed Jose Nicanor Mendez Danish Khan Lin Miruo
author_sort	Muhammad Kashif
title	Pore size distribution, their geometry and connectivity in deeply buried Paleogene Es1 sandstone reservoir, Nanpu Sag, East China
title_short	Pore size distribution, their geometry and connectivity in deeply buried Paleogene Es1 sandstone reservoir, Nanpu Sag, East China
title_full	Pore size distribution, their geometry and connectivity in deeply buried Paleogene Es1 sandstone reservoir, Nanpu Sag, East China
title_fullStr	Pore size distribution, their geometry and connectivity in deeply buried Paleogene Es1 sandstone reservoir, Nanpu Sag, East China
title_full_unstemmed	Pore size distribution, their geometry and connectivity in deeply buried Paleogene Es1 sandstone reservoir, Nanpu Sag, East China
title_sort	pore size distribution, their geometry and connectivity in deeply buried paleogene es1 sandstone reservoir, nanpu sag, east china
publisher	KeAi Communications Co., Ltd.
publishDate	2019
url	https://doaj.org/article/973a41cd187b4084a3c80532d328f0d6
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Pore size distribution, their geometry and connectivity in deeply buried Paleogene Es1 sandstone reservoir, Nanpu Sag, East China

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