Page 117 - Fundamentals of Reservoir Engineering

PVT ANALYSIS FOR OIL 56

bubble point, irrespective of its magnitude. In this chapter it will be assumed, for
consistency, that this unit volume is one reservoir barrel of bubble point oil (1−rb b).

Heise pressure
gauge

mercury
PV reservoir
cell
thermal
jacket

mercury pump

Fig. 2.8 Schematic of PV cell and associated equipment

p < p
p i p b b
oil oil gas
t
v t = v o v = 1
v t
oil
Hg Hg Hg

(a)

gas

p b p < p b
oil v gas v o oil
g
v = 1 v o oil
o

Hg Hg Hg

(b)

Fig. 2.9 Illustrating the difference between (a) flash expansion, and (b) differential
liberation