CO2 Sequestration [Reservoir Hydrodynamics 03]
1. Since, potential difference could produce motive force and could overcome the resistance, causing CO2 to migrate (despite, both energy and potential being directionless scalars), can the potential energy be used to quantitatively estimate the kinetic feature and the law of variations of CO2 and brine?
2. Since, following CO2 injection, different forces of CO2 and brine use to have different directions {buoyancy: upward; over-pressure: outward; inertia: forward; interfacial force: inward}; whether, the resultant force produced due to the comprehensive action of different kinds of forces would still remain equal to a mathematical summing up of different motive forces?
If not, then, the work done by the resultant force (fluid potential) would not remain equal to the sum of the work done by different forces?
3. When the geo-potential energy is acted upon by buoyancy force, the bottom of the cap-rock remains to be a low-potential region that would chiefly control the movement and trapping of CO2: Can it be related with structural trapping of CO2?
4. When CO2 remains acted upon by the differential capillary pressure, the interfacial potential energy would play a main role in the CO2-brine interface; and becomes the primary mechanism controlling the movement and trapping of CO2: Can it be related with capillary trapping?
5. When CO2 remains acted upon by hydrodynamic forces, the dynamic energy often forms a low-potential area, where brine flows at a decelerated speed, thus making it possible to form a hydrodynamic CO2 pool. Can it be related with hydrodynamic trapping?
OR
CO2 trapping is not merely a problem with the fluid potential but with an issue with both the dynamic and resisting forces?
OR
Despite being the magnitudes of the interfacial energy and the dynamic energy remaining very small in comparison with that of the geo-potential energy and pressure energy, whether, CO2 trapping is a problem with the interaction between the dynamic moving force and the resisting force (and where, a balance between these two forces could be reached)?
Suresh Kumar Govindarajan Professor (HAG) IIT-Madras
https://home.iitm.ac.in/gskumar/
https://iitm.irins.org/profile/61643
24-July-2024
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