Water-flooding characteristics of lithologic reservoir in Ordos basin

Abstract Due to the poor situation of water-flooding mechanism research on Chang 4 + 5 reservoir of Ordos basin, the authors quantitatively studied the influence factors of water-flooding characteristics by sedimentology, casting thin sections, constant-speed mercury injection, scanning electron mic...

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Autores principales:	Jie He, Xiaodong Liu, Xinyu Zhu, Tao Jiang, Hui He, Lin Zhou, Qinghai Liu, Yushuang Zhu, Linyu Liu
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/52d3b5a560904cd18d2f360a88742bee
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spelling	oai:doaj.org-article:52d3b5a560904cd18d2f360a88742bee2021-12-02T10:48:13ZWater-flooding characteristics of lithologic reservoir in Ordos basin10.1038/s41598-021-82035-42045-2322https://doaj.org/article/52d3b5a560904cd18d2f360a88742bee2021-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-82035-4https://doaj.org/toc/2045-2322Abstract Due to the poor situation of water-flooding mechanism research on Chang 4 + 5 reservoir of Ordos basin, the authors quantitatively studied the influence factors of water-flooding characteristics by sedimentology, casting thin sections, constant-speed mercury injection, scanning electron microscope as well as production records. The size and distribution of pore-throat were also found closely related with the water-flooding seepage law. The results show that the microscopic seepage paths of Chang 4 + 5 reservoir include uniform displacement, finger displacement and peak displacement, and their correspondent oil displacement efficiency reduces in turn under the same conditions. Reservoir heterogeneity, reservoir properties, distribution of pore structure and wettability play a decisive role in water-flooding efficiency. Generally, When the intra-layer range is greater than 4.65, the breakthrough coefficient is greater than 3.54, the coefficient of variation is greater than 0.7, the distribution frequency of inter-layer is greater than 0.5 per meter, and the distribution density is greater than 0.435%, the range between layers is greater than 6.86, the breakthrough coefficient is greater than 2.58, the coefficient of variation is greater than 0.51, and the thickness of inter-layer is greater than 7.54 m. the increasing trend of oil displacement efficiency will be obviously weakened.Jie HeXiaodong LiuXinyu ZhuTao JiangHui HeLin ZhouQinghai LiuYushuang ZhuLinyu LiuNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-17 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Jie He Xiaodong Liu Xinyu Zhu Tao Jiang Hui He Lin Zhou Qinghai Liu Yushuang Zhu Linyu Liu Water-flooding characteristics of lithologic reservoir in Ordos basin
description	Abstract Due to the poor situation of water-flooding mechanism research on Chang 4 + 5 reservoir of Ordos basin, the authors quantitatively studied the influence factors of water-flooding characteristics by sedimentology, casting thin sections, constant-speed mercury injection, scanning electron microscope as well as production records. The size and distribution of pore-throat were also found closely related with the water-flooding seepage law. The results show that the microscopic seepage paths of Chang 4 + 5 reservoir include uniform displacement, finger displacement and peak displacement, and their correspondent oil displacement efficiency reduces in turn under the same conditions. Reservoir heterogeneity, reservoir properties, distribution of pore structure and wettability play a decisive role in water-flooding efficiency. Generally, When the intra-layer range is greater than 4.65, the breakthrough coefficient is greater than 3.54, the coefficient of variation is greater than 0.7, the distribution frequency of inter-layer is greater than 0.5 per meter, and the distribution density is greater than 0.435%, the range between layers is greater than 6.86, the breakthrough coefficient is greater than 2.58, the coefficient of variation is greater than 0.51, and the thickness of inter-layer is greater than 7.54 m. the increasing trend of oil displacement efficiency will be obviously weakened.
format	article
author	Jie He Xiaodong Liu Xinyu Zhu Tao Jiang Hui He Lin Zhou Qinghai Liu Yushuang Zhu Linyu Liu
author_facet	Jie He Xiaodong Liu Xinyu Zhu Tao Jiang Hui He Lin Zhou Qinghai Liu Yushuang Zhu Linyu Liu
author_sort	Jie He
title	Water-flooding characteristics of lithologic reservoir in Ordos basin
title_short	Water-flooding characteristics of lithologic reservoir in Ordos basin
title_full	Water-flooding characteristics of lithologic reservoir in Ordos basin
title_fullStr	Water-flooding characteristics of lithologic reservoir in Ordos basin
title_full_unstemmed	Water-flooding characteristics of lithologic reservoir in Ordos basin
title_sort	water-flooding characteristics of lithologic reservoir in ordos basin
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/52d3b5a560904cd18d2f360a88742bee
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Water-flooding characteristics of lithologic reservoir in Ordos basin

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