Page 13 - Geology and Geochemistry of Oil and Gas

xii NOMENCLATURE

relative NGR factor
DI ng
K filtration coefficient
pressure-abnormality factor
K a
k permeability
permeability parallel to bedding
k J
k ? permeability perpendicular to bedding
k i modeling coefficient of sediment compaction
L ligroin content
L length
length of capillaries
L c
M mathematical expectancy
M molecular mass
m mass
m number of parameters in the data matrix
m cementation exponent
N number of measurements, tests or observations
n number of objects in the data matrix
n saturation exponent
O object
P parameter
accumulation’s total potential energy
P acc
breakthrough potential
P breakthrough
maximum potential of pore water in seal
P pw
water potential of the lower layer
P w.l, layer
water potential of the upper layer
P w.u, layer
water potential in reservoir
P wr
p i probability
P c capillary pressure
P pressure
p e external pressure, total overburden pressure
formation pressure
p f
internal pressure, pore-fluid pressure
p i
effective (grain-to-grain) pressure
p eff
lithostatic (overburden) pressure
p lit
pore pressure
p p
reservoir pressure
p r
normalized pressure
p norm
Dp pressure differential
cation-exchange capacity per 100 g of rock
Q 100
q volumetric flow rate
liquid production rate
q liq
oil production rate
q oil
R content of resins and asphaltenes
rate of sedimentation
R d