relation: https://khub.utp.edu.my/scholars/16619/
title: Effect of organic acids on CO2-rock and water-rock interfacial tension: Implications for CO2 geo-storage
creator: Al-Yaseri, A.
creator: Yekeen, N.
creator: Ali, M.
creator: Pal, N.
creator: Verma, A.
creator: Abdulelah, H.
creator: Hoteit, H.
creator: Sarmadivaleh, M.
description: A small concentration of organic acid in carbon dioxide (CO2) storage formations and caprocks could significantly alter the wettability of such formations into less water-wet conditions, decreasing the CO2-storage potential and containment security. Recent studies have attempted to infer the influence of the organic acid concentration on the wettability of rock�CO2�brine systems by measuring advancing and receding contact angles. However, no studies have investigated the influence of organic acid contamination on CO2-storage capacities from rock-fluid interfacial tension (IFT) data because solid-brine and solid-CO2 IFT values cannot be experimentally measured. Equilibrium contact angles and rock-fluid IFT datasets were used to evaluate the viability of CO2 storage in storage rocks and caprocks. First, the contact angles of rock in brine-CO2 systems were measured to compute Young's equilibrium contact angles. Subsequently, rock-brine and rock-gas IFT values at CO2 geo-storage conditions were computed via a modified form of Neumann's equation of state. For two storage-rock minerals (quartz and calcite) and one caprock mineral (mica), the results demonstrated high CO2-brine equilibrium contact angles at high pressure (0.1�25 MPa) and increasing concentrations of stearic acid (10�5 to 10�2 mol/L). Rock-brine IFT increased with the increased stearic acid concentration but remained constant with increased pressure. In all conditions, the order of increasing hydrophobicity of the mineral surfaces is calcite > mica > quartz. At 323 K, 25 MPa, and a stearic acid concentration of 10�2 mol/L, quartz became intermediate-wet with a CO2-brine equilibrium contact angle of 89.8°, whereas mica and calcite became CO2-wet with CO2-brine equilibrium contact angles of 117.5° and 136.5°, respectively. This work provides insight into the effects of organic acids inherent in CO2 geo-storage formations and caprocks on rock wettability and rock-fluid interfacial interactions. © 2022 The Authors
publisher: Elsevier B.V.
date: 2022
type: Article
type: PeerReviewed
identifier:   Al-Yaseri, A. and Yekeen, N. and Ali, M. and Pal, N. and Verma, A. and Abdulelah, H. and Hoteit, H. and Sarmadivaleh, M.  (2022) Effect of organic acids on CO2-rock and water-rock interfacial tension: Implications for CO2 geo-storage.  Journal of Petroleum Science and Engineering, 214.   ISSN 09204105     
relation: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85127494103&doi=10.1016%2fj.petrol.2022.110480&partnerID=40&md5=132d7d52ebea67a3b693821c8762ec08
relation: 10.1016/j.petrol.2022.110480
identifier: 10.1016/j.petrol.2022.110480