Multiphase Flow in Porous Media: Cake Formation During Extreme Drilling Processes

摘要: The successful completion of a wellbore requires low-permeable filter cake to be deposited on the walls seal porous formation exposed by drill bit. filtration processes triggered differential pressure between drilling fluid in borehole and pore spaces rocks are well known both operations and, greater importance, subsequent production oil. acts as barrier prevent excessive loss into formation, invasion fluid. presence also provides stability reduces damage formation. Understanding flow through media is necessary for process. This need becomes even more important during extreme drilling, when temperature may exceed 35,000 psi 500 °F. work presents our effort simulate processes. Earlier investigations were focused single-phase phenomena media; recent studies have emphasized multiphase (thermo-fluid) closely mimic actual composed fine particles viscous In present study, Eulerian–Eulerian approach employed evaluate patterns ultra-deep at high-temperature, high-pressure conditions. rheology has been published previously [14] repeated here completeness. Two competitive sub-models considered: power-law Herschel–Bulkley models. rheological model appears superior best describes non-Newtonian behavior due yield stress term this model.