Page 339 - Petrophysics 2E

NOMENCLATURE 307

fg internal geometry factor
fi m fraction of total porosity occupied by a mixture of formation
water and dispersed clay

fshd fraction of total porosity occupied by dispersed shale
Fsd sand resistivity factor
FR formation resistivity factor
G shear modulus
Gsh shale group in the total shale model
h thickness
I amount of current
Io amount of current in oil
IR resistivity index
IRA radioactive or gamma-ray index
IW amount of current in water
K bulk modulus
k permeability
L length
La actual length of the flow path
M weighing multiplier
m cementation factor
n saturation exponent
4 flow rate
Q" volume concentration
R resistivity
Ro resistivity of porous rock 100% saturated with brine
R* resistivity of brine (water)
Rt true resistivity
Rsh resistivity of shale
Rshd resistivity of dispersed shale
RWT water resistivity at temperature T
r0 resistance of oil
rW resistance of water
S saturation of surface
Swsh water saturation in shaly sand
T temperature
TL laboratory temperature
t total transit time
tfl fluid travel time
tma matrix travel time
tsh acoustic reading for 100% shale
V velocity
vma velocity of sound in matrix
Vsh shale volume (fraction)
V volume
x,y Cartesian coordinates, constants