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PhD Category
Abubakar Isah, KFUPM, Saudi Arabia:
CO2 Mineralization in Anhydrite-Rich Rocks: Implications for Subsurface Co2 Storage
Carbon dioxide (CO2) emissions significantly contribute to global warming and climate change, necessitating urgent efforts to reduce the atmospheric CO2 levels and establish reliable storage methods. Subsurface CO2 mineralization emerges as an effective solution to address anthropogenic CO2 emissions. The process of mineral carbonation, characterized as a heterogeneous reaction that produces stable carbonates, presents a promising and secure pathway for long-term geo-storage of carbon dioxide.
Utilizing subsurface geological formations such as basalts for CO2 storage via mineralization has been identified as a dependable approach. However, there are few studies in the literature on carbon mineralization in anhydrite-rich rocks to evaluate their potential for subsurface CO2 storage. Anhydrite is chemically reactive and undergoes dissolution and precipitation; therefore, it holds great potential for CO2 storage via mineralization.
This research focuses on exploring anhydrite-CO2-brine interactions for CO2 storage in anhydrite-rich depleted oil and gas reservoirs. Results indicated that anhydrite, when exposed to supercritical CO2-saturated brine, undergoes a significant mineral transformation. This mineral modification leads to the formation of stable minerals, including calcite, siderite, and barite.
Undergraduate/Masters Category
Anngy D. Roman Ortega and Stefany G. Penaranda Gonzalez:
Evaluation of Petrophysical and Geomechanical Properties of the Illinois Basin Decatur Project Reservoir for Safe CO2 Storage
Carbon dioxide (CO2) storage stands out as an important strategy in mitigating global climate change by reducing CO2 in the atmosphere. For the proper development of these projects, the reservoirs must have good sealing properties, porosity, and permeability, and faults must also be prevented from generating seismicity or CO2 leakage.
This research studies well logs, plugs, and laboratory results using information from the Decatur project database in the Illinois Basin of the United States. In this sense, data integration and log processing are used to determine pore geometry and irreducible water saturation distribution (related to microporosity and wettability) to account for pore medium heterogeneity, as well as a geomechanical evaluation of faults and the mud window.
The methodology proposed in this work provides results that describe the sealing and reservoir formation properties and establishes a secure injection window that ensures reservoir stability at a geomechanical level, with the main objective of evaluating the suitability of these formations as primary candidates for CO2 storage while simultaneously preventing fractures and seismicity in the reservoir, specifically in the Mt. Simon formations in the Illinois Basin, USA.
Your Instructor
Abubakar Isah obtained his MSc and PhD in Petroleum Engineer from KFUPM in May 2020 and June 2024, respectively. He has passion for fluids-rock interactions for CCUS, H2 storage and EOR applications. He Possesses knowledge across various aspects of petroleum and gas engineering, with background in subsurface CO2-brine-rock interactions in the presence and absence of chemical additives, as well as an extensive experience in experimental petrophysics, HPHT core flooding, and rock-fluid interactions in porous media using both commercial and in-house designed static and batch reactors. He has experience in rock-fluids interactions quantification techniques such as NMR, SEM-EDX and FTIR, micro-CT, and through geochemical analysis of reaction effluents.