A preliminary assessment of geological CO2 storage in the Khorat Plateau, Thailand

Abstract

The main carbon dioxide (CO2) emissions in Thailand come from the energy sector. Gas-based power plants, including natural gas and biogas, are CO2 point sources, and are mostly located in the Khorat Plateau. Geological CO2 storage is an important element in the effort to reduce CO2 emissions from CO2 point sources. This study is a preliminary assessment of the geological CO2 storage potential of the onshore Khorat Plateau. A potential geological formation is screened and ranked in terms of its suitability as a CO2 storage site (storage optimization, risk minimization and feasibility). The results of this screening and ranking indicate that, among the tested sites in this study, the Khorat Permian carbonate is the most suitable for geological CO2 storage, followed by the Khorat Group sandstone, and Khorat evaporite. However, the Khorat Cenozoic basalts are not suitable for geological CO2 storage in the Khorat Plateau. The results from this study should advance the understanding of petroleum exploration and carbon capture and storage technology in Thailand, especially in the Khorat area. However, it should be noted that more subsurface studies are needed, and more criteria should be included in the future to improve the reliability of the assessment of geological CO2 storage potential in the Khorat Plateau.

Experiments of CO2-Basalt-Fluid Interactions and Micromechanical Alterations: Implications for Carbon Mineralization

“…Furthermore, although the ratio of Na:Ca was greater than 1, the concentration of Ca was higher than that of Na, as the dissolution of albite was lower than that of anorthite under acidic conditions. 35 It is worth noting that the Al concentration was extremely low, not exceeding 0.1 mmol/L, even though the stoichiometric ratio of Si/Al being 1.68. In general, the release rate of Al is faster than Si at acidic pH.…”

“…Considering that plagioclase constitutes the majority, accounting for over 70%, it is of great significance to enhance its dissolution rate, thereby improving the carbon storage efficiency. Furthermore, although the ratio of Na:Ca was greater than 1, the concentration of Ca was higher than that of Na, as the dissolution of albite was lower than that of anorthite under acidic conditions . It is worth noting that the Al concentration was extremely low, not exceeding 0.1 mmol/L, even though the stoichiometric ratio of Si/Al being 1.68.…”

Reactivity of Basaltic Minerals for CO2 Sequestration via In Situ Mineralization: A Review

“…It is important to note that the reactions mentioned above are simplified representations of the complex processes occurring during mineral carbonation. The actual reactions and reaction rates can be influenced by various factors, including temperature, pressure, fluid composition, and the specific mineralogy of the alkaline basalts [171].…”

Geo-mechanical and geo-morphology characterisation of the cap rocks in the Niger Delta for potential carbon capture and storage

“…Hameli et al [ 8 ] and Umar et al [ 6 ] attested that carbon dioxide accounts for about 65 % of the greenhouse effect. This leaves carbon dioxide as the major contributor to global warming [ 9 ]. The increase in average temperature globally can be correlated to the increase in carbon dioxide concentration in the atmosphere [ [10] , [11] , [12] ].…”

“…Carbon Capture and Storage in geological sinks has been identified as one of the possible significant ways to reduce the anthropogenic carbon dioxide in the atmosphere [ [15] , [16] , [17] , [18] , [19] ]. Sedimentary basins around the world have been identified as potential for carbon sequestration [ 4 , 9 ]. Espinoza et al [ 20 ] suggests that sedimentary formations were chosen because it has been proven that natural carbon dioxide accumulates in them where pore pressure varies from hydrostatic pressure to lithostatic pressure, however, it is essential that the chosen basins be characterized.…”