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Appendix A
P s e u d o p r e s s u r e s o f S w e e tN a t u r a l G a s e
s
Real gas pseudopressure m(p) is defined as
(A.I)
where pb is the base pressure that is about 14.7 psia. The
pseudopressurecurves presented in this appendix were generated
using gas viscositygiven by the correlation of Carr, Kobayashi, and
Burrows. Gas deviationfactors were calculated with the correlation
of Brill and Beggs. The fol-lowing correlations were used for
computing pseudocritical propertieswith no impurity:
(A.2)
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esure(psia
2jfcp)
esure(psia
26p)
Figure A-1 Real gas pseudopressure of a sweet natural
gas,specific gravity 0.60.p
Figure A-2 Real gas pseudopressure of a sweet natural
gas,specific gravity 0.65.9
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esure(psia
2p)
esure(psia
2p)
Figure A-3 Real gas pseudopressure of a sweet natural
gas,specific gravity 0.70.
p
Figure A-4 Real gas pseudopressure of a sweet natural
gas,specific gravity 0.75.
p
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esure(psia
2/fcp)
esure(psia
2p)
Figure A-6 Real gas pseudopressure of a sweet natural
gas,specific gravity 0.85.
p
Figure A-5 Real gas pseudopressure of a sweet natural
gas,specific gravity 0.80.
p
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Appendix B
N o r m a l i z e d P r e s s u r e s o f S w e e tN a t u r a l
G a s e s
Real gas normalized pressure n(p) is defined as
(B.I)
where pr is the pseudoreduced pressure. The normalized pressure
curvespresented in this appendix were generated using gas deviation
factors cal-culated with the correlation of Brill and Beggs. The
following correla-tions w ere used for com puting pseudocritical
properties with no impurity:
(B.2)
(B.3)
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NormalizedPressure
NormalizedPressure
Pressure (psia)Figure B-1 Normalized pressure of a sweet natural
gas, specific gravity 0.60.
G as Specific Gravity 0.65
Pressure (psia)Figure B-2 Normalized pressure of a sweet natural
gas, specific gravity 0.65.
G as Specific Gravity 0.60
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NormalizedPressure
NormalizedPressure
G as Specific Gravity 0.70
Pressure (psia)Figure B-3 Normalized pressure of a sweet natural
gas, specific gravity 0.70.
Gas Specific Gravity 0.75
Pressure (psia)Figure B-4 Normalized pressure of a sweet natural
gas, specific gravity 0.75.
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NormalizedPressure
NormalizedPressure
G as Specific Gravity 0.80
Pressure (psia)Figure B-5 Normalized pressure of a sweet natural
gas, specific gravity 0.80.G as Specific Gravity 0.85
Pressure (psia)
Figure B-6 Normalized pressure of a sweet natural gas, specific
gravity 0.85.
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