Page 61 - Fundamentals of Reservoir Engineering

NOMENCLATURE LXI

GREEK d displacing phase
D dimensionless (pressure, time, radius)
β turbulent coefficient for non-Darcy flow D dimensionless (expressed in movable oil
(ch. 8) volumes)
β angle between the oil -water contact and DA dimensionless (time)
the direction of flow, -stable segregated e effective
displacement (ch. 10)
e at the production end of a reservoir block
γ specific gravity (liquids,-relative to water (e.g. S we)
=1 at standard conditions; gas,-relative to f flash separation (PVT)
air=1 at standard conditions)
f flood front
γ exponent of Euler's constant (=1.782) f pore (e.g. c f − pore compressibility)
∆ difference (taken as a positive difference
e.g. ∆p = p i-p) g gas
λ mobility h heated zone
i cumulative injection
θ dip angle of the reservoir
i initial conditions
Θ contact angle
n number of flow period
µ viscosity
N " " " "
ρ density
n (superscript) time step number
σ surface tension
o oil
φ porosity
p cumulative production
Φ fluid potential per unit mass
r reduced
ψ fluid potential per unit volume (datum r relative
pressure)
r residual
s steam
SUBSCRIPTS
s solution gas
sc standard conditions
b bubble point
bt breakthrough t total
c capillary w water
wf wellbore flowing
c critical
d differential (PVT analysis) ws wellbore static
d dimensionless (expressed in pore
volumes)