Author Identifier
Mirhasan Hosseini
https://orcid.org/0000-0001-6400-0366
Faisal Ur Rahman Awan
https://orcid.org/0000-0003-2394-0735
Nilesh Kumar Jha
https://orcid.org/0000-0003-2929-6899
Alireza Keshavarz
https://orcid.org/0000-0002-8091-961X
Stefan Iglauer
Document Type
Journal Article
Publication Title
Fuel
Publisher
Elsevier
School
School of Engineering
RAS ID
58444
Funders
This research was supported by the Australian Government through the Australian Research Council’s Discovery Projects funding scheme (project DP220102907)
Grant Number
ARC Number : DP220102907
Abstract
The electric surface charge of basalt in contact with filing fluids (e.g. water and CO2) has broad range of applications in varied fields such as gas geological storage sites, geothermal systems, and hydrocarbon reservoirs. The surface charge at the interface between a solid surface (e.g. rock) and liquid (e.g. aqueous solution) can be quantified by the zeta potential, thus zeta potential measurement is a useful technique for interpreting wetting characteristics of rock-fluid systems. However, there is no data for zeta potentials of basaltic rocks in presence of aqueous solutions or how zeta potentials may be affected by pressure, temperature, salinity, or pH. Thus, streaming potential measurements were performed to determine the zeta potential of basaltic rocks in the presence of aqueous NaCl solution at pore pressures (1.72 MPa to 6.9 MPa), temperatures (298 K and 323 K), brine salinities (1 wt% NaCl to 3.5 wt% NaCl), and pH values (4 to 10). Also, the effects of mineralogy and CO2-presence (dead and live brines) on the zeta potential were evaluated. The results showed that the zeta potential remained constant versus pressure, while it increased (became less negative) with increasing temperature and salinity, and decreased (became more negative) with increasing pH. This study provides key fundamental data and thus improves fundamental understanding of basalt-water-CO2 interactions, thereby aiding in the improvement of various industrial applications, including gas geo-storage schemes and geothermal energy production.
DOI
10.1016/j.fuel.2023.128996
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.
Comments
Hosseini, M., Awan, F. U. R., Jha, N. K., Keshavarz, A., & Iglauer, S. (2023). Streaming and zeta potentials of basalt as a function of pressure, temperature, salinity, and pH. Fuel, 351, article 128996. https://doi.org/10.1016/j.fuel.2023.128996