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"calcualtion of solution gas oil ratio "

"calcualtion of solution gas oil ratio "

"calcualtion of solution gas oil ratio "

(OP)
dear freinds
i want to design pipeline for two phase flow(oil-gas) by a computer program

so the first think  in such case is to find a correlation
by which one can calculate the dissolved gas and formation volume factor and other properties that dependent on pressure and temperature. i uesed Vasquez-Beggs Equation,published  in 1980 in jpt .this equation is as follows    

Rs = C1 x gamma(gas) x p ^ C2 x exp [ C3 ( gamma(oil) / T + 460 ) ]     --1

gamma(gas)here is a gas gravity(air=1) that would result from seperator conditions of 100 psig

c1,c2,c3 are constants depend on API  

P,T:average pressure and temperature at any pipeline section.

how one could obtain this gamma(gas),for pipeline case?

thanks

RE: "calcualtion of solution gas oil ratio "

a cut and paste from the API excel sheet to estimate oil storage tank break out and flashing losses.



FLASHING LOSSES USING THE VASQUEZ-BEGGS EQUATION                                                            
                                                            
Vasquez-Beggs Equation            Value    Equation                            Reference                
Q=    Annual Production, bbl/yr        184.52                                                
APIG=    API Gravity (Degrees)        50    From liquid analysis                                            
C1=    Vasquez-Beggs Constant        0.0178    If API Gravity >30 then C1=0.0178, otherwise =0.0362                            Table 22.6, pg. 22-8 PE Handbook                
C2=    Vasquez-Beggs Constant        1.187    If API Gravity >30 then C2=1.187, otherwise =1.0937                            Table 22.6, pg. 22-8 PE Handbook                
C3=    Vasquez-Beggs Constant        23.931    If API Gravity >30 then C3=23.931, otherwise =25.724                            Table 22.6, pg. 22-8 PE Handbook                
AD=    Air density @ 14.7 psia and 60 F (lb/cu.ft.)        0.076318    Default =0.076318                            Table B-2, Air Pollution Control (Cooper & Alley)                
T=    Fluid Temperature in vessel        60.25    Default =100 F                                            
VP=    Upstream vessel pressure (psig)        30    Default =30 psig                                            
UP=    Upstream pressure (psia)        44.7    UP = VP + 14.7                                            
SG=    Specific gravity of gas in separator (Air =1)        0.71    From gas analysis                                            
CSG=    Corrected specific gravity of gas        0.6582    CSG = SG * (1.0+5.912E-05*APIG*T*Log(UP/114.7))                            Eq. 11, pg. 22-7, PE Handbook                
GD=    Gas Density (lb/cu.ft.)        0.0502    GD = CSG * AD                                            
GOR=    Gas to oil ratio (scf/bbl)        10.6312    GOR = CI * CSG * UP^C2 *EXP ((C3*APIG)/(T+460))                            Vasquez-Beggs Correlation Equation (1)            
E=    Control efficiency (% Reduction)        0    Default: 0                                        
                                                        
Lf=    Correlated Flashing Loss (lb/yr)        98.54689348    Lf = GOR * Q * GD * (100-E)/100                                        
Lf=    Correlated Flashing Loss (tpy)        0.049    Lf /2000 lb/ton                                        

(1) Gas to oil ratio (GOR) is calculated using the Vasquez-Beggs Correlation; equation (17), pg. 22-9 PE Handbook                                                        

RE: "calcualtion of solution gas oil ratio "

(OP)
thank you very much dear for your helpfull aid


PE handbook its short for petroleum engineering handbook ?

what is the the name of the author?

thanks again


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