Page 12 - Geology and Geochemistry of Oil and Gas

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NOMENCLATURE

diffusion–adsorption factor
A da
absolute geological age
A t
B ‘‘benzine’’ (gasoline) content
bulk volume elasticity
B el
fracture spacing
B f
C classification
carbonate cement content
C carb
clay cement content
C cl
D depth
d water density at 3.981C
d diameter
d w wellbore diameter
d act actual wellbore diameter
nominal wellbore diameter
d nom
pore-channel diameter
d ch
average pore diameter
d p,ave
median pore diameter
d p,Me
E expectancy
F formation resistivity factor
formation resistivity factor at reservoir conditions
F p,t
F 0 resistivity index
0
F p,t resistivity index at reservoir conditions
G geothermal gradient
oil pressure gradient in reservoir
G o
initial water pressure gradient in seal
G w
DG Gibbs free-energy difference
H entropy of information
maximum entropy
H max
relative entropy
H r
zero hypothesis
H 0
h thickness
effective (net) thickness
h eff
shale thickness
h sh
Dh seal seal thickness
Dh accumulation column
I quantity of information
relative GR factor
DI g