Effects of Diffusion, Adsorption, and Hysteresis on Huff-n-Puff Performance in Ultratight Reservoirs with Different Fluid Types and Injection Gases

Cyclic solvent injection, known as solvent huff-n-puff, is one of the promising techniques for enhancing oil recovery from shale reservoirs. This study investigates the huff-n-puff performance in ultratight shale reservoirs by conducting large-scale numerical simulations for a wide range of reservoi...

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Autores principales:	Khaled Enab, Hamid Emami-Meybodi
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	huff-n-puff ultratight reservoir diffusion adsorption hysteresis Technology T
Acceso en línea:	https://doaj.org/article/6e0a9fd5f9bc4b9984231b1c40c21549
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id	oai:doaj.org-article:6e0a9fd5f9bc4b9984231b1c40c21549
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spelling	oai:doaj.org-article:6e0a9fd5f9bc4b9984231b1c40c215492021-11-11T16:06:24ZEffects of Diffusion, Adsorption, and Hysteresis on Huff-n-Puff Performance in Ultratight Reservoirs with Different Fluid Types and Injection Gases10.3390/en142173791996-1073https://doaj.org/article/6e0a9fd5f9bc4b9984231b1c40c215492021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1073/14/21/7379https://doaj.org/toc/1996-1073Cyclic solvent injection, known as solvent huff-n-puff, is one of the promising techniques for enhancing oil recovery from shale reservoirs. This study investigates the huff-n-puff performance in ultratight shale reservoirs by conducting large-scale numerical simulations for a wide range of reservoir fluid types (retrograde condensate, volatile oil, and black oil) and different injection gases (CO<sub>2</sub>, C<sub>2</sub>H<sub>6</sub>, and C<sub>3</sub>H<sub>8</sub>). A dual-porosity compositional model is utilized to comprehensively evaluate the impact of multicomponent diffusion, adsorption, and hysteresis on the production performance of each reservoir fluid and the retention capacity of the injection gases. The results show that the huff-n-puff process improves oil recovery by 4–6% when injected with 10% PV of gas. Huff-n-puff efficiency increases with decreasing gas-oil ratio (GOR). C<sub>2</sub>H<sub>6</sub> provides the highest recovery for the black oil and volatile oil systems, and CO<sub>2</sub> provides the highest recovery for retrograde condensate fluid type. Diffusion and adsorption are essential mechanisms to be considered when modeling gas injection in shale reservoirs. However, the relative permeability hysteresis effect is not significant. Diffusion impact increases with GOR, while adsorption impact decreases with increasing GOR. Oil density reduction caused by diffusion is observed more during the soaking period considering that the diffusion of the injected gas caused a low prediction error, while adsorption for the injected gas showed a noticeable error.Khaled EnabHamid Emami-MeybodiMDPI AGarticlehuff-n-puffultratight reservoirdiffusionadsorptionhysteresisTechnologyTENEnergies, Vol 14, Iss 7379, p 7379 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	huff-n-puff ultratight reservoir diffusion adsorption hysteresis Technology T
spellingShingle	huff-n-puff ultratight reservoir diffusion adsorption hysteresis Technology T Khaled Enab Hamid Emami-Meybodi Effects of Diffusion, Adsorption, and Hysteresis on Huff-n-Puff Performance in Ultratight Reservoirs with Different Fluid Types and Injection Gases
description	Cyclic solvent injection, known as solvent huff-n-puff, is one of the promising techniques for enhancing oil recovery from shale reservoirs. This study investigates the huff-n-puff performance in ultratight shale reservoirs by conducting large-scale numerical simulations for a wide range of reservoir fluid types (retrograde condensate, volatile oil, and black oil) and different injection gases (CO<sub>2</sub>, C<sub>2</sub>H<sub>6</sub>, and C<sub>3</sub>H<sub>8</sub>). A dual-porosity compositional model is utilized to comprehensively evaluate the impact of multicomponent diffusion, adsorption, and hysteresis on the production performance of each reservoir fluid and the retention capacity of the injection gases. The results show that the huff-n-puff process improves oil recovery by 4–6% when injected with 10% PV of gas. Huff-n-puff efficiency increases with decreasing gas-oil ratio (GOR). C<sub>2</sub>H<sub>6</sub> provides the highest recovery for the black oil and volatile oil systems, and CO<sub>2</sub> provides the highest recovery for retrograde condensate fluid type. Diffusion and adsorption are essential mechanisms to be considered when modeling gas injection in shale reservoirs. However, the relative permeability hysteresis effect is not significant. Diffusion impact increases with GOR, while adsorption impact decreases with increasing GOR. Oil density reduction caused by diffusion is observed more during the soaking period considering that the diffusion of the injected gas caused a low prediction error, while adsorption for the injected gas showed a noticeable error.
format	article
author	Khaled Enab Hamid Emami-Meybodi
author_facet	Khaled Enab Hamid Emami-Meybodi
author_sort	Khaled Enab
title	Effects of Diffusion, Adsorption, and Hysteresis on Huff-n-Puff Performance in Ultratight Reservoirs with Different Fluid Types and Injection Gases
title_short	Effects of Diffusion, Adsorption, and Hysteresis on Huff-n-Puff Performance in Ultratight Reservoirs with Different Fluid Types and Injection Gases
title_full	Effects of Diffusion, Adsorption, and Hysteresis on Huff-n-Puff Performance in Ultratight Reservoirs with Different Fluid Types and Injection Gases
title_fullStr	Effects of Diffusion, Adsorption, and Hysteresis on Huff-n-Puff Performance in Ultratight Reservoirs with Different Fluid Types and Injection Gases
title_full_unstemmed	Effects of Diffusion, Adsorption, and Hysteresis on Huff-n-Puff Performance in Ultratight Reservoirs with Different Fluid Types and Injection Gases
title_sort	effects of diffusion, adsorption, and hysteresis on huff-n-puff performance in ultratight reservoirs with different fluid types and injection gases
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/6e0a9fd5f9bc4b9984231b1c40c21549
work_keys_str_mv	AT khaledenab effectsofdiffusionadsorptionandhysteresisonhuffnpuffperformanceinultratightreservoirswithdifferentfluidtypesandinjectiongases AT hamidemamimeybodi effectsofdiffusionadsorptionandhysteresisonhuffnpuffperformanceinultratightreservoirswithdifferentfluidtypesandinjectiongases
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Effects of Diffusion, Adsorption, and Hysteresis on Huff-n-Puff Performance in Ultratight Reservoirs with Different Fluid Types and Injection Gases

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