Difference between revisions of "Valko - McCain bubble point pressure correlation"
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:<math> 0.555 \le SG_g \le 1.685 </math> | :<math> 0.555 \le SG_g \le 1.685 </math> | ||
:<math> 15.6 \le T, C \le 172.2 </math> | :<math> 15.6 \le T, C \le 172.2 </math> | ||
+ | |||
+ | == Example == | ||
+ | ===Input data=== | ||
+ | :<math>R_s</math> = 60 sm3/sm3 | ||
+ | :<math>SG_o</math> = 0.85 or 35 API | ||
+ | :<math>SG_g</math> = 0.75 | ||
+ | :<math>T</math> = 90C or 363K | ||
+ | Calculate bubble point pressure? | ||
+ | ===Solution=== | ||
+ | z1=-0.2422<br/> | ||
+ | z2=0.0294<br/> | ||
+ | z3=0.1122<br/> | ||
+ | z4=-0.0594<br/> | ||
+ | ln(Pb)=2.4557<br/> | ||
+ | Pb=11.65MPa or 115atm | ||
== Nomenclature == | == Nomenclature == |
Revision as of 07:48, 28 September 2020
Contents
Valko - McCain bubble point pressure correlation
Valko - McCain is an empirical correlation for the bubble point pressure published in 2003 [1].
Math & Physics
where:
A0 = -4.814074834
A1 = 0.7480913
A2 = 0.1743556
A3 = -0.0206
B0 = 1.27
B1 = -0.0449
B2 = 4.36e-4
B3 = -4.76e-6
C0 = 4.51
C1 = -10.84
C2 = 8.39
C3 = -2.34
D0 = -7.2254661
D1 = 0.043155
D2 = -8.55e-5
D3 = 6.00696e-8
Application range
Example
Input data
- = 60 sm3/sm3
- = 0.85 or 35 API
- = 0.75
- = 90C or 363K
Calculate bubble point pressure?
Solution
z1=-0.2422
z2=0.0294
z3=0.1122
z4=-0.0594
ln(Pb)=2.4557
Pb=11.65MPa or 115atm
Nomenclature
- = oil specific gravity, °API
- = coefficients
- = coefficients
- = coefficients
- = coefficients
- = bubble point pressure, MPa
- = solution oil gas ratio, sm3/sm3
- = gas specific gravity, dimensionless
- = oil specific gravity, dimensionless
- = temperature, °K
References
- ↑ Valkó, P. P.; McCain, W.D. (2003). "Reservoir oil bubblepoint pressures revisited; solution gas–oil ratios and surface gas specific gravities.". J. Pet. Sci. Eng. 37 (3–4): 153-169.
- ↑ Afanasyev, Vitaliy; Moskvin, Igor; Wolcott, Ken; McCain, W.D. (2004). "Practical PVT Calculations for black oils". YUKOS publication.