Institutt for petroleumsteknologi og anvendt geofysikk - NTNU
Institutt for petroleumsteknologi og anvendt geofysikk - NTNU
Institutt for petroleumsteknologi og anvendt geofysikk - NTNU
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Gasstetthet <strong>og</strong> standard betingelser<br />
Reell gass-loven<br />
Gasstetthet<br />
pV = znRT<br />
n<br />
V<br />
( mol / kg)<br />
3<br />
( kg / m )<br />
p =<br />
=<br />
( kg kmol)<br />
M /<br />
p<br />
zRT<br />
pM<br />
zRT<br />
Standard betingelser (s.c. = standard conditions)<br />
n =<br />
n s.c.<br />
pV =<br />
zRT<br />
z<br />
s. c.<br />
=<br />
1<br />
p<br />
z<br />
V<br />
s.<br />
c.<br />
s.<br />
c.<br />
s.<br />
c.<br />
RTs.<br />
c.<br />
V<br />
= V<br />
s.<br />
c.<br />
⎛ p<br />
⎜<br />
s.<br />
⎝ p<br />
c.<br />
⎞⎛<br />
⎟<br />
⎜<br />
⎠⎝<br />
T<br />
T<br />
s.<br />
c.<br />
⎟ ⎞<br />
z<br />
⎠<br />
q ∝ V<br />
Formasjons-volum-faktor (FVF) gass<br />
B<br />
g<br />
V<br />
V<br />
⎛ T<br />
=<br />
⎜<br />
⎝ Ts.<br />
⎞⎛<br />
p<br />
⎜<br />
s .<br />
⎟<br />
⎠⎝<br />
p<br />
c.<br />
=<br />
s.<br />
c.<br />
c.<br />
⎞<br />
⎟z<br />
⎠<br />
44
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