22 Advances in Geologic Carbon Sequestration

Tuesday, 19 April 2016
8:00 AM - 12:00 PM
Chancellor Ballroom

ALTERATION OF BIOTITE WETTABILITY BY SALINITY-INDUCED CHEMICAL REACTIONS UNDER CONDITIONS RELEVANT TO GEOLOGIC CO2 SEQUESTRATION

Paper number: 22-3
Program: Theme Sessions
Time: 8:40 AM – 9:00 AM

Authors

  • Lijie Zhang Presenting Author
    Washington University in St. Louis, Saint Louis, MO
  • Yongman Kim
    Lawrence Berkeley National Laboratory, Berkeley, CA
  • Jiamin Wan
    Lawrence Berkeley National Laboratory, Berkeley, CA
  • Young-Shin Jun
    Washington University in St. Louis, Saint Louis, MO

Abstract

The wettability of rocks and minerals significantly impacts the efficiency and safety of geologic CO2 sequestration. In this study, we investigated the effects of salinity-induced chemical reactions on biotite wettability changes under relevant operation conditions. Biotite was reacted with brine of different salinities (DI water, 0.1, 0.5, and 1.0 M NaCl) at 95 oC and 102 atm CO2 for 70 h. Then, static and dynamic contact angles of the prereacted biotite with brine (0.1 M NaCl) and supercritical CO2 were measured using the captive drop method at 102 atm CO2 and 48 oC. We found that reaction with higher salinity solution resulted in more hydrophilic biotite surfaces. This increased hydrophilicity is due to increased surface roughness, increased surface negative charge and higher densities of hydroxyl groups. Additionally, CO2 adhesion was observed during CO2 receding process. Higher contact angle hysteresis was also observed for samples with a higher incidence of CO2 adhesion, suggesting that CO2 adhesion could have contributed to the hysteresis. For the first time, we experimentally related chemical reactions and the consequent wettability alterations of minerals under GCS relevant conditions. These findings can be beneficial in understanding CO2 or other reactive fluids’ transport and their distribution in subsurface systems during energy-related operations.

Geological Society of America Abstracts with Programs. Vol. 48, No. 5

doi: 10.1130/abs/2016NC-275116

© Copyright 2016 The Geological Society of America (GSA), all rights reserved. Permission is hereby granted to the author(s) of this abstract to reproduce and distribute it freely, for noncommercial purposes. Permission is hereby granted to any individual scientist to download a single copy of this electronic file and reproduce up to 20 paper copies for noncommercial purposes advancing science and education, including classroom use, providing all reproductions include the complete content shown here, including the author information. All other forms of reproduction and/or transmittal are prohibited without written permission from GSA Copyright Permissions.