Abstract: Methods for carbon dioxide sequestration may comprise: introducing a fluid stream comprising carbon dioxide into an encapsulated salt minibasin, the encapsulated salt minibasin being surrounded by a salt barrier defining one or more boundaries thereof; and storing carbon dioxide from the fluid stream within the encapsulated salt minibasin after introduction thereto, the salt barrier retaining the carbon dioxide within the encapsulated salt minibasin.

Abstract: Methods for carbon dioxide sequestration may comprise: providing a carbonated aqueous fluid containing carbon dioxide dissolved in a first aqueous fluid; and introducing the carbonated aqueous fluid into a salt minibasin containing a second aqueous fluid having a density that is less than that of the carbonated aqueous fluid, the salt minibasin having a salt barrier defining one or more boundaries thereof. The second aqueous fluid is displaced upward as the carbonated aqueous fluid is being introduced to the salt minibasin to form a barrier layer overlaying the carbonated aqueous fluid, and the barrier layer and the salt barrier maintain the carbonated aqueous fluid within the salt minibasin. In one example, the salt minibasin may be an open salt minibasin having a concave shape.

Abstract: The present disclosure relates to systems and/or methods for predicting the location of subsurface reservoirs of natural hydrogen. One or more embodiments described herein include a system that can comprise a memory to store computer executable instructions. The system can also comprise one or more processors, operatively coupled to the memory, that execute the computer executable instructions to implement a hydrogen exploration controller configured to generate a plurality of maps characterizing a geographical region. The respective maps from the plurality of maps can delineate a location of respective geological features within the geographical region that are associated with a presence of a subsurface reservoir of natural hydrogen. Additionally the hydrogen exploration controller can be further configured to identify an area in the geographical region that comprises a convergence of two or more of the respective geological features based on the plurality of maps.

Abstract: Methods for storing carbon dioxide in a subsurface formation include identifying a plurality of negative geologic closures in the subsurface formation. The dimensions of the plurality of negative geologic closures are characterized. Layers of subsurface formation in the vicinity the negative geologic closures are characterized. One of the negative geologic closures is selected for bottom-up storage of carbon dioxide based on the characterized dimensions and layers.

Abstract: A method and system for both enhancing oil recovery of a reservoir and permanently sequestering carbon dioxide (CO2) is described. The method includes dissolving CO2 in a base fluid at a surface location of an injection formation, forming a dense CO2-brine solution, introducing the dense CO2-brine solution into an injection well, accumulating a volume of the dense CO2-brine solution in a structural low, displacing a native formation fluid from the injection well, increasing a fluid drive pressure from the injection well to a producing well, and displacing hydrocarbons of the producing well. The system includes an injection system in fluid communication with an injection well, a production well of the hydrocarbon production formation, and a dense CO2-brine solution that has a density greater than a native formation fluid of the injection formation.

Abstract: Methods for storing carbon dioxide in a subsurface formation include identifying a plurality of negative geologic closures in the subsurface formation. The dimensions of the plurality of negative geologic closures are characterized. Layers of subsurface formation in the vicinity the negative geologic closures are characterized. One of the negative geologic closures is selected for bottom-up storage of carbon dioxide based on the characterized dimensions and layers.

Abstract: A method and system for both enhancing oil recovery of a reservoir and permanently sequestering carbon dioxide (CO2) is described. The method includes dissolving CO2 in a base fluid at a surface location of an injection formation, forming a dense CO2-brine solution, introducing the dense CO2-brine solution into an injection well, accumulating a volume of the dense CO2-brine solution in a structural low, displacing a native formation fluid from the injection well, increasing a fluid drive pressure from the injection well to a producing well, and displacing hydrocarbons of the producing well. The system includes an injection system in fluid communication with an injection well, a production well of the hydrocarbon production formation, and a dense CO2-brine solution that has a density greater than a native formation fluid of the injection formation.