Simulation of tight fluid flow with the consideration of capillarity and stress-change effect

Abstract The horizontal wells and multi-stage hydraulic fracturing technologies play a significantly important role in developing unconventional reservoirs. Due to the nanopore effects and stress deformation in tight formations, the fluid equilibrium and thermodynamics become more complex and the co...

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Autores principales:	Yuan Zhang, Yuan Di, Pengcheng Liu, Wanzhen Li
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2019
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/57b83ef0fa3c49ba8818919f4c026b9f
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spelling	oai:doaj.org-article:57b83ef0fa3c49ba8818919f4c026b9f2021-12-02T15:09:37ZSimulation of tight fluid flow with the consideration of capillarity and stress-change effect10.1038/s41598-019-41861-32045-2322https://doaj.org/article/57b83ef0fa3c49ba8818919f4c026b9f2019-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-019-41861-3https://doaj.org/toc/2045-2322Abstract The horizontal wells and multi-stage hydraulic fracturing technologies play a significantly important role in developing unconventional reservoirs. Due to the nanopore effects and stress deformation in tight formations, the fluid equilibrium and thermodynamics become more complex and the conventional reservoir simulation models cannot accurately handle these mechanisms. Hence, the objective of this work is to propose a comprehensive simulation model considering the effects of confined space and stress-dependent deformation. We first evaluated the phase envelope and fluid properties in the confined nanopores. Results show that bubble-point pressure and oil viscosity decrease, while formation volume factor and gas-oil ratio increase. The heavy components cause large deviation on the P-T phase envelope at the reservoir condition. Subsequently, a reservoir simulation model of the Bakken tight oil reservoir was built including the effect of stress-dependent deformation. The proposed phase behavior model was applied into the reservoir simulator to predict the hydrocarbon production from the Bakken tight oil reservoir. Finally, the role of the confined space and the stress-dependent deformation on the production are examined in detail. This novel simulation approach can shed light on the better understanding of the key parameters affecting well production of in developing tight oil reservoirs in the future.Yuan ZhangYuan DiPengcheng LiuWanzhen LiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 9, Iss 1, Pp 1-12 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Yuan Zhang Yuan Di Pengcheng Liu Wanzhen Li Simulation of tight fluid flow with the consideration of capillarity and stress-change effect
description	Abstract The horizontal wells and multi-stage hydraulic fracturing technologies play a significantly important role in developing unconventional reservoirs. Due to the nanopore effects and stress deformation in tight formations, the fluid equilibrium and thermodynamics become more complex and the conventional reservoir simulation models cannot accurately handle these mechanisms. Hence, the objective of this work is to propose a comprehensive simulation model considering the effects of confined space and stress-dependent deformation. We first evaluated the phase envelope and fluid properties in the confined nanopores. Results show that bubble-point pressure and oil viscosity decrease, while formation volume factor and gas-oil ratio increase. The heavy components cause large deviation on the P-T phase envelope at the reservoir condition. Subsequently, a reservoir simulation model of the Bakken tight oil reservoir was built including the effect of stress-dependent deformation. The proposed phase behavior model was applied into the reservoir simulator to predict the hydrocarbon production from the Bakken tight oil reservoir. Finally, the role of the confined space and the stress-dependent deformation on the production are examined in detail. This novel simulation approach can shed light on the better understanding of the key parameters affecting well production of in developing tight oil reservoirs in the future.
format	article
author	Yuan Zhang Yuan Di Pengcheng Liu Wanzhen Li
author_facet	Yuan Zhang Yuan Di Pengcheng Liu Wanzhen Li
author_sort	Yuan Zhang
title	Simulation of tight fluid flow with the consideration of capillarity and stress-change effect
title_short	Simulation of tight fluid flow with the consideration of capillarity and stress-change effect
title_full	Simulation of tight fluid flow with the consideration of capillarity and stress-change effect
title_fullStr	Simulation of tight fluid flow with the consideration of capillarity and stress-change effect
title_full_unstemmed	Simulation of tight fluid flow with the consideration of capillarity and stress-change effect
title_sort	simulation of tight fluid flow with the consideration of capillarity and stress-change effect
publisher	Nature Portfolio
publishDate	2019
url	https://doaj.org/article/57b83ef0fa3c49ba8818919f4c026b9f
work_keys_str_mv	AT yuanzhang simulationoftightfluidflowwiththeconsiderationofcapillarityandstresschangeeffect AT yuandi simulationoftightfluidflowwiththeconsiderationofcapillarityandstresschangeeffect AT pengchengliu simulationoftightfluidflowwiththeconsiderationofcapillarityandstresschangeeffect AT wanzhenli simulationoftightfluidflowwiththeconsiderationofcapillarityandstresschangeeffect
_version_	1718387815781236736

Simulation of tight fluid flow with the consideration of capillarity and stress-change effect

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