Difference between revisions of "Velarde solution gas oil ratio correlation"

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<ref name=Standing&Katz>{{cite journal
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Velarde, J., Blasingame, T.A., and McCain Jr., W.D. 1997. Correlation of Black Oil Properties At Pressures Below Bubble Point Pressure - A New Approach. Presented at the Annual Technical Meeting of CIM, Calgary, Alberta, 8–11 June. PETSOC-97-93.
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|last1= Standing |first1=M. B.
 
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|last2= Katz |first2=D. L.
 
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|title=Density of Natural Gases
 
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|journal=Transactions of the AIME
 
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|publisher=Society of Petroleum Engineers
 
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|number=SPE-942140-G
 
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|date=December 1942
 
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|volume=146
 
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|url=https://www.onepetro.org/journal-paper/SPE-942140-G
 
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|url-access=registration
 
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<ref name= Dranchuk >{{cite journal
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<ref name=Velarde>{{cite journal
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  |last1= Dranchuk |first1=P. M.
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  |last1= Velarde |first1=J.
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  |last2= Abou-Kassem |first2=H.
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  |last2= Blasingame |first2=T. A.
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  |title=Calculation of Z Factors For Natural Gases Using Equations of State
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|last3= McCain Jr. |first3=W. D.
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  |journal=The Journal of Canadian Petroleum
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  |title=Correlation of Black Oil Properties At Pressures Below Bubble Point Pressure - A New Approach
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  |number=PETSOC-75-03-03
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  |journal=Presented at the Annual Technical Meeting of CIM, Calgary, Alberta
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  |date=July 1975
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|publisher=Petroleum Society of Canada
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|volume=14
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  |number=PETSOC-97-93
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  |url=https://www.onepetro.org/journal-paper/PETSOC-75-03-03
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  |date=1997
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  |url=https://www.onepetro.org/conference-paper/PETSOC-97-93
 
  |url-access=registration  
 
  |url-access=registration  
 
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[[Category:pengtools]]
 
[[Category:pengtools]]
 
[[Category:PVT]]
 
[[Category:PVT]]

Revision as of 11:04, 8 June 2017

Brief

Velarde correlation is ...

Math & Physics

R_s = \frac{R_{sr}}{R_{sb}}
R_{sr} = \alpha1 \times Pr^{\alpha2} + (1 - \alpha1) \times Pr^{\alpha3}[1]

where:

A0 = 1.8653e-4
A1 = 1.672608
A2 = 0.929870
A3 = 0.247235
A4 = 1.056052

\alpha1 = A_0 \times SG^{A_1}_{gas} \times Y^{A_2}_{oil_API} \times {(T- 459.67)}^{A_3} \times P^{A_3}_{bp}

B0 = 0.1004
B1 = -1.00475
B2 = 0.337711
B3 = 0.132795
B4 = 0.302065

\alpha2 = B_0 \times SG^{B_1}_{gas} \times Y^{B_2}_{oil_API} \times {(T - 459.67)}^{B_3} \times P^{B_4}_{bp}

C0 = 0.9167
C1 = -1.48548
C2 = -0.164741
C3 = -0.09133
C4 = 0.047094

\alpha3 = C_0 \times SG^{C_1}_{gas} \times Y^{C_2}_{oil_API} \times {(T - 459.67)}^{C_3} \times P^{C_4}_{bp}

Discussion

Why the Velarde correlation?

Workflow

Application range

Nomenclature

A_1..A_{4} = coefficients
B_1..B_{4} = coefficients
C_1..C_{4} = coefficients
\rho_r = reduced density, dimensionless
P = pressure, psia
P_{pc} = pseudo critical pressure, psia
P_{pr} = pseudoreduced pressure, dimensionless
SG_g = gas specific gravity, dimensionless
T = temperature, °R
T_{pc} = pseudo critical temperature, °R
T_{pr} = pseudoreduced temperature, dimensionless
Y_{oil_API} = oil API gravity, dimensionless
z = gas compressibility factor, dimensionless

References

  1. ↑ Velarde, J.; Blasingame, T. A.; McCain Jr., W. D. (1997). "Correlation of Black Oil Properties At Pressures Below Bubble Point Pressure - A New Approach"Free registration required. Presented at the Annual Technical Meeting of CIM, Calgary, Alberta. Petroleum Society of Canada (PETSOC-97-93). 
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