Effect of methyl orange and methylene blue on the wettability of organic acid aged sandstone and carbonate formations: Implication for CO2 and H2 geo-storage
Author Identifier
Mujahid Ali: https://orcid.org/0000-0002-9305-9188
Stefan Iglauer: https://orcid.org/0000-0002-8080-1590
Alireza Keshavarz: https://orcid.org/0000-0002-8091-961X
Document Type
Conference Proceeding
Publication Title
APOGCE 2024 - SPE Asia Pacific Oil and Gas Conference and Exhibition
Publisher
Society of Petroleum Engineers
School
Centre for Sustainable Energy and Resources / School of Engineering
Abstract
Underground storage of carbon dioxide (CO2) and hydrogen (H2) in geological formations has been considered an effective method for the energy transition towards a low-carbon industry. The wettability of the rock is a significant parameter for underground gas storage, determining both the storage capacity and containment safety. This study focuses on using two chemicals, methyl orange (MO) and methylene blue (MB), as wetting agents at different concentrations (10 to 100 mg/L) to change rock wettability and improve the storage capacity of CO2 and H2. To achieve this, the contact angle measurement technique was utilised to measure the advancing (θa) and receding (θr) contact angles under reservoir conditions, with a constant pressure of 13 MPa for the hydrogen system and 20 MPa for the CO2 system, temperatures of 25°C and 50°C, and a brine salinity of 0.3 M NaCl. To mimic reservoir conditions, the surfaces of both calcite and quartz samples were treated with stearic acid before being exposed to the wetting agent chemicals. Although the surfaces of these treated samples are hydrophobic, modifying their surfaces with even a very trace concentration of MO or MB significantly alters the wettability from hydrophobic to hydrophilic. This demonstrates that the presence of organic acids can affect the storage capacity of CO2 and H2 in reservoir rock. However, injecting even a very diluted amount of MO or MB into sandstone and carbonate geological formations can increase CO2 and H2 storage capacity.
DOI
10.2118/221315-MS
Access Rights
subscription content
Comments
Fatemah, A., Mujahid, A., Stefan, I., & Alireza, K. (2024, October). Effect of methyl orange and methylene blue on the wettability of organic acid aged sandstone and carbonate formations: Implication for CO2 and H2 geo-storage. In SPE Asia Pacific Oil and Gas Conference and Exhibition (p. D011S002R006). Society of Petroleum Engineers. https://doi.org/10.2118/221315-MS