New Understanding of Transient Pressure Response in the Transition Zone of Oil-Water and Gas-Water Systems

Figure 8

(a) The total mobility curve and (b) the volumetric of water curve just downstream of the saturation front (), before 48.16 hr, the combined water does not flow, but because the oil is moving, the total mobility decreases. (c) The total mobility curve and (d) the volumetric of water curve at upstream saturation front (), from 48.16 hr, the water encroachment will occur, the total mobility starts to increase rapidly.

(a)

(b)

(c)

(d)