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Fluid Mobility

• Production rate is proportional to fluid mobility, the measure of the efficiency of fluid movement through a reservoir
• Mobility of each fluid depends on its relative permeability, which changes significantly with fluid phase saturations in transition zones.
• Oil mobility at native reservoir and steam temperatures varies both vertically and laterally.
• Oil viscosity variations often dominate HOOS oil phase mobility, which generally decreases dramatically towards the base of pay.
• Water mobility often increases as water saturation increases towards base of pay or within top or middle water zones.
• Intersecting viscous fluid domains and sedimentologically controlled permeability domains in reservoirs produce complex mobility distributions in which recovery processes must operate, and
• Understanding and predicting oil and water mobility in HOOS reservoirs is the key to optimizing oil recovery processes.