Reservoir Engineering: Capillary Pressure
Would it remain feasible to capture and observe the two macroscopically distinct, single-phase fluid flow regions (oil and brine) - separated by an abrupt ‘macroscopic interface’ @ laboratory-scale using experimental investigations?
If so, will it make an advancement - by the way – we actually measure the ‘capillary pressure’ from these two distinct fluid flow regimes (the point, where exactly, we are supposed to measure the ‘oil pressure’ and ‘water pressure’ within the respective fluid regimes); and in turn, the way the (Saffman-Taylor) ‘stability issues’ are being handled (based on the assumption of abrupt interface approximation), while characterizing fluid flow through a petroleum reservoir?
Feasible to capture the way, ‘the displacement starts becoming unstable’ ‘under higher IFT’, when the mobility of the displaced phase remains relatively lower than that of the displacing phase @ laboratory-scale?
How easy would it remain to capture the ‘effective IFT’ (as a function of IFT between the phases; capillary number; relative permeability; mobility; & capillary pressure charcateristics) that allows for the (oil and water) pressures in the two regions across the interface - to be related to the curvature of the ‘macroscopic interface’ – in order to assess the contribution of ‘capillary effects’ and subsequently, to observe the effect of “capillarity exerting a stabilizing influence @ smaller wavelengths with the onset of instability occurring @ wavelengths greater than its critical value” @ laboratory-scale?
And, to what extent, will we be able to assess the contribution to stability of viscous and capillary effects (capillary/non-capillary flow stability) by capturing (a) the growth and shape of unstable macroscopic fingers; (b) the linear and non-linear stability of immiscible layers; and (c) the stability of bounded flows - by introducing the abrupt interface approximation @ laboratory-scale using experimental investigations - which includes simultaneous fluid flow and capillarity in the presence of gravity override and considering the effects of hysteresis on relative permeabilities and capillary pressure?
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