CO2 flow in saline aquifer with salt precipitation

Purpose - The purpose of this paper is to introduce the solution to two-phase flow in CO2/brine system with salt precipitation by applying mixed hybrid finite element (MHFE) method to pressure equation and finite volume (FV) method to saturation equation. Mixed finite element method solves pressure...

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Main Authors: Pau, J.S., Pao, W., Yong, S.P.
Format: Article
Institution: Universiti Teknologi Petronas
Record Id / ISBN-0: utp-eprints.25813 /
Published: Emerald Group Publishing Ltd. 2016
Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84951161926&doi=10.1108%2fHFF-02-2015-0051&partnerID=40&md5=d85e878f9be515e5e6de6d2e2678f989
http://eprints.utp.edu.my/25813/
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spelling utp-eprints.258132021-08-27T13:06:27Z CO2 flow in saline aquifer with salt precipitation Pau, J.S. Pao, W. Yong, S.P. Purpose - The purpose of this paper is to introduce the solution to two-phase flow in CO2/brine system with salt precipitation by applying mixed hybrid finite element (MHFE) method to pressure equation and finite volume (FV) method to saturation equation. Mixed finite element method solves pressure and velocity in two subspaces while hybrid method is an extension of mixed method, where the Lagrange multiplier is added to the former in order to ensure the continuity from one element to the adjacent elements. The authors propose the modeling of salt precipitation using core flood experimental result and adapt to be applicable for numerical modeling. Design/methodology/approach - The governing equations are discretized using Mixed Hybrid Finite Element-Finite Volume (MHFE-FV) method. This method has the feature of localized conservation which is attractive for application on heterogeneous porous media. In addition to this, the salt precipitation effect is modeled using the data from core flood experiment (Ott et al., 2011). The random data are linearized to obtain the relationship between salt precipitate and CO2 saturation and implemented to the algorithm for two-phase flow in CO2 and brine system. Findings - The solution of MHFE-FV scheme has good agreement with the solution using implicit pressure and explicit saturation (IMPES) reported by Negara et al. (2011), with average error of 4.20 percent. Localized conservation is demonstrated in the case of randomized heterogeneous porous media where fingering effects are explicitly observed. Salt precipitation prediction using the proposed method is able to predict the decrement of porosity by 16.71 percent and permeability by 22.19 percent. This results in the decreased amount of CO2 injected by 64.70 percent. Research limitations/implications - This paper presents the solution of two-phase flow in CO2 brine system during CO2 injection in saline aquifer using MHFE-FV method with the additional salt precipitation model obtained based on core flood experiment result. Practical implications - A methodology to predict the salt precipitation based on CO2 saturation. Social implications - Contribution to green house gas reduction. Originality/value - The authors use MHFE-FV to solve hyperbolic PDE to obtain accurate results of CO2 saturation, and subsequently use this to compute the salt precipitation. © Emerald Group Publishing Limited. Emerald Group Publishing Ltd. 2016 Article NonPeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-84951161926&doi=10.1108%2fHFF-02-2015-0051&partnerID=40&md5=d85e878f9be515e5e6de6d2e2678f989 Pau, J.S. and Pao, W. and Yong, S.P. (2016) CO2 flow in saline aquifer with salt precipitation. International Journal of Numerical Methods for Heat and Fluid Flow, 26 (1). pp. 122-145. http://eprints.utp.edu.my/25813/
institution Universiti Teknologi Petronas
collection UTP Institutional Repository
description Purpose - The purpose of this paper is to introduce the solution to two-phase flow in CO2/brine system with salt precipitation by applying mixed hybrid finite element (MHFE) method to pressure equation and finite volume (FV) method to saturation equation. Mixed finite element method solves pressure and velocity in two subspaces while hybrid method is an extension of mixed method, where the Lagrange multiplier is added to the former in order to ensure the continuity from one element to the adjacent elements. The authors propose the modeling of salt precipitation using core flood experimental result and adapt to be applicable for numerical modeling. Design/methodology/approach - The governing equations are discretized using Mixed Hybrid Finite Element-Finite Volume (MHFE-FV) method. This method has the feature of localized conservation which is attractive for application on heterogeneous porous media. In addition to this, the salt precipitation effect is modeled using the data from core flood experiment (Ott et al., 2011). The random data are linearized to obtain the relationship between salt precipitate and CO2 saturation and implemented to the algorithm for two-phase flow in CO2 and brine system. Findings - The solution of MHFE-FV scheme has good agreement with the solution using implicit pressure and explicit saturation (IMPES) reported by Negara et al. (2011), with average error of 4.20 percent. Localized conservation is demonstrated in the case of randomized heterogeneous porous media where fingering effects are explicitly observed. Salt precipitation prediction using the proposed method is able to predict the decrement of porosity by 16.71 percent and permeability by 22.19 percent. This results in the decreased amount of CO2 injected by 64.70 percent. Research limitations/implications - This paper presents the solution of two-phase flow in CO2 brine system during CO2 injection in saline aquifer using MHFE-FV method with the additional salt precipitation model obtained based on core flood experiment result. Practical implications - A methodology to predict the salt precipitation based on CO2 saturation. Social implications - Contribution to green house gas reduction. Originality/value - The authors use MHFE-FV to solve hyperbolic PDE to obtain accurate results of CO2 saturation, and subsequently use this to compute the salt precipitation. © Emerald Group Publishing Limited.
format Article
author Pau, J.S.
Pao, W.
Yong, S.P.
spellingShingle Pau, J.S.
Pao, W.
Yong, S.P.
CO2 flow in saline aquifer with salt precipitation
author_sort Pau, J.S.
title CO2 flow in saline aquifer with salt precipitation
title_short CO2 flow in saline aquifer with salt precipitation
title_full CO2 flow in saline aquifer with salt precipitation
title_fullStr CO2 flow in saline aquifer with salt precipitation
title_full_unstemmed CO2 flow in saline aquifer with salt precipitation
title_sort co2 flow in saline aquifer with salt precipitation
publisher Emerald Group Publishing Ltd.
publishDate 2016
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-84951161926&doi=10.1108%2fHFF-02-2015-0051&partnerID=40&md5=d85e878f9be515e5e6de6d2e2678f989
http://eprints.utp.edu.my/25813/
_version_ 1741197036569493504
score 11.62408

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