Performance comparison of novel chemical agents in improving oil recovery from tight sands through spontaneous imbibition

Abstract Tight sands are abundant in nanopores leading to a high capillary pressure and normally a low fluid injectivity. As such, spontaneous imbibition might be an effective mechanism for improving oil recovery from tight sands after fracturing. The chemical agents added to the injected water can...

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Autores principales:	Hai Huang, Tayfun Babadagli, Xin Chen, Huazhou Andy Li
Formato:	article
Lenguaje:	EN
Publicado:	KeAi Communications Co., Ltd. 2019
Materias:	Spontaneous imbibition Novel chemical agent Water flooding Tight sands Science Q Petrology QE420-499
Acceso en línea:	https://doaj.org/article/da83c4640fed4d9d8ccbaa9ae5f1563f
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spelling	oai:doaj.org-article:da83c4640fed4d9d8ccbaa9ae5f1563f2021-12-02T06:40:15ZPerformance comparison of novel chemical agents in improving oil recovery from tight sands through spontaneous imbibition10.1007/s12182-019-00369-11672-51071995-8226https://doaj.org/article/da83c4640fed4d9d8ccbaa9ae5f1563f2019-09-01T00:00:00Zhttp://link.springer.com/article/10.1007/s12182-019-00369-1https://doaj.org/toc/1672-5107https://doaj.org/toc/1995-8226Abstract Tight sands are abundant in nanopores leading to a high capillary pressure and normally a low fluid injectivity. As such, spontaneous imbibition might be an effective mechanism for improving oil recovery from tight sands after fracturing. The chemical agents added to the injected water can alter the interfacial properties, which could help further enhance the oil recovery by spontaneous imbibition. This study explores the possibility of using novel chemicals to enhance oil recovery from tight sands via spontaneous imbibition. We experimentally examine the effects of more than ten different chemical agents on spontaneous imbibition, including a cationic surfactant (C12TAB), two anionic surfactants (O242 and O342), an ionic liquid (BMMIM BF4), a high pH solution (NaBO2), and a series of house-made deep eutectic solvents (DES3–7, 9, 11, and 14). The interfacial tensions (IFT) between oil phase and some chemical solutions are also determined. Experimental results indicate that both the ionic liquid and cationic surfactant used in this study are detrimental to spontaneous imbibition and decrease the oil recovery from tight sands, even though cationic surfactant significantly decreases the oil–water IFT while ionic liquid does not. The high pH NaBO2 solution does not demonstrate significant effect on oil recovery improvement and IFT reduction. The anionic surfactants (O242 and O342) are effective in enhancing oil recovery from tight sands through oil–water IFT reduction and emulsification effects. The DESs drive the rock surface to be more water-wet, and a specific formulation (DES9) leads to much improvement on oil recovery under counter-current imbibition condition. This preliminary study would provide some knowledge about how to optimize the selection of chemicals for improving oil recovery from tight reservoirs.Hai HuangTayfun BabadagliXin ChenHuazhou Andy LiKeAi Communications Co., Ltd.articleSpontaneous imbibitionNovel chemical agentWater floodingTight sandsScienceQPetrologyQE420-499ENPetroleum Science, Vol 17, Iss 2, Pp 409-418 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	Spontaneous imbibition Novel chemical agent Water flooding Tight sands Science Q Petrology QE420-499
spellingShingle	Spontaneous imbibition Novel chemical agent Water flooding Tight sands Science Q Petrology QE420-499 Hai Huang Tayfun Babadagli Xin Chen Huazhou Andy Li Performance comparison of novel chemical agents in improving oil recovery from tight sands through spontaneous imbibition
description	Abstract Tight sands are abundant in nanopores leading to a high capillary pressure and normally a low fluid injectivity. As such, spontaneous imbibition might be an effective mechanism for improving oil recovery from tight sands after fracturing. The chemical agents added to the injected water can alter the interfacial properties, which could help further enhance the oil recovery by spontaneous imbibition. This study explores the possibility of using novel chemicals to enhance oil recovery from tight sands via spontaneous imbibition. We experimentally examine the effects of more than ten different chemical agents on spontaneous imbibition, including a cationic surfactant (C12TAB), two anionic surfactants (O242 and O342), an ionic liquid (BMMIM BF4), a high pH solution (NaBO2), and a series of house-made deep eutectic solvents (DES3–7, 9, 11, and 14). The interfacial tensions (IFT) between oil phase and some chemical solutions are also determined. Experimental results indicate that both the ionic liquid and cationic surfactant used in this study are detrimental to spontaneous imbibition and decrease the oil recovery from tight sands, even though cationic surfactant significantly decreases the oil–water IFT while ionic liquid does not. The high pH NaBO2 solution does not demonstrate significant effect on oil recovery improvement and IFT reduction. The anionic surfactants (O242 and O342) are effective in enhancing oil recovery from tight sands through oil–water IFT reduction and emulsification effects. The DESs drive the rock surface to be more water-wet, and a specific formulation (DES9) leads to much improvement on oil recovery under counter-current imbibition condition. This preliminary study would provide some knowledge about how to optimize the selection of chemicals for improving oil recovery from tight reservoirs.
format	article
author	Hai Huang Tayfun Babadagli Xin Chen Huazhou Andy Li
author_facet	Hai Huang Tayfun Babadagli Xin Chen Huazhou Andy Li
author_sort	Hai Huang
title	Performance comparison of novel chemical agents in improving oil recovery from tight sands through spontaneous imbibition
title_short	Performance comparison of novel chemical agents in improving oil recovery from tight sands through spontaneous imbibition
title_full	Performance comparison of novel chemical agents in improving oil recovery from tight sands through spontaneous imbibition
title_fullStr	Performance comparison of novel chemical agents in improving oil recovery from tight sands through spontaneous imbibition
title_full_unstemmed	Performance comparison of novel chemical agents in improving oil recovery from tight sands through spontaneous imbibition
title_sort	performance comparison of novel chemical agents in improving oil recovery from tight sands through spontaneous imbibition
publisher	KeAi Communications Co., Ltd.
publishDate	2019
url	https://doaj.org/article/da83c4640fed4d9d8ccbaa9ae5f1563f
work_keys_str_mv	AT haihuang performancecomparisonofnovelchemicalagentsinimprovingoilrecoveryfromtightsandsthroughspontaneousimbibition AT tayfunbabadagli performancecomparisonofnovelchemicalagentsinimprovingoilrecoveryfromtightsandsthroughspontaneousimbibition AT xinchen performancecomparisonofnovelchemicalagentsinimprovingoilrecoveryfromtightsandsthroughspontaneousimbibition AT huazhouandyli performancecomparisonofnovelchemicalagentsinimprovingoilrecoveryfromtightsandsthroughspontaneousimbibition
_version_	1718399783671955456

Performance comparison of novel chemical agents in improving oil recovery from tight sands through spontaneous imbibition

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