Chemical Enhanced Oil Recovery [Dynamic IFT, dynamic wettability, interface stiffening]
If capillary pressure in a cylindrical pore of a particular radius depends on contact angle and interfacial tension; and, if surface tension and contact angles remain affected by IFT, wettability, roughness, gas pressure, impurities and surfactants, then, how exactly to go about measuring ‘dynamic IFT’ (as against static IFT); and dynamic wettability (as against static wettability)?
Feasible to measure dynamic IFT & dynamic wettability associated with a real reservoir system having non-cylindrical pores, where, capillary pressure and fluid invasion reflect the irregular cross section of pores as well as their converging-diverging longitudinal geometry? In such cases, would it remain feasible to distinguish between Haines jump (abrupt changes in pressure and its associated drastic changes in fluid distribution) and Snap-off (advancing non-wetting fluid becoming discontinuous, while going through the pore-throat, because, wetting fluid flowing along corners and crevices reaches the pore throat and pinches the non-wetting fluid)?
How exactly to capture the evolution of time-dependent surfactant adsorption and interfacial concentration, in response to changes in pore geometry?
Feasible to measure capillary pressure across a pore constriction, where, capillary pressure remains to depend on surface tension, contact angle and the evolving pore geometry as the fluid interface traverses the pore constriction in advancing and receding phases (given the fact that the measured capillary pressures cannot be readily anticipated from static-bulk fluid measurements as the transient surface tension can be significantly lower than in static experiments)?
Whether interface stiffening in a relatively higher surfactant concentration solution during receding fronts gain more importance?
