Journal of Chemistry

Research Article

An Improved CO2-Crude Oil Minimum Miscibility Pressure Correlation

Table 2

Correlations for CO2-oil MMP.
AuthorPublished empirical correlationRemarks
Cronquist [4](a)  (i) The tested oil gravity ranged from 23.7 to 44.8°API 
(ii) The tested ranged from 21.67 to 120.8°C 
(iii) The tested experimental MMP ranged from 7.4 to 34.5 MPa
Lee [13](b)  (i) Based on equating MMP with CO2 vapor pressure when < CO2 critical temperature, while using the corresponding correlation when ⩾ CO2 critical temperature
(ii) If MMP < , is taken as MMP
Yelling-Metcalfe [14] (c)  Limitations: 35.8 ≤ T < 88.9°C
(i) If MMP < , is taken as MMP
Orr-Jensen [15](d)  (i) Based on extrapolated vapor pressure (EVP) method
(ii) Used to estimate the MMP for low temperature reservoirs (°C)
Glaso [16]When < 18 mol%,
(e1)   
When > 18%,
(e2)  		Considers the effect of intermediates (C2–C6) only when (C2–C6) < 18 mol%
Alston [17]When  MPa
(f1)   
When  MPa
(f2)  		If MMP < , is taken as MMP
Emera-Sarma [18]When  MPa
(g1)   
When  MPa
(g2)  		Limitations: 40.8 < T < 112.2°C; 8.28 < < 30.2 MPa; 166.2 < < 267.5 g/mol
Yuan [19](h)    
 
; ; ;  
;   101;  ;  
; 		Limitations: 21.7 < T < 148°C;  < 70 MPa;
139 < < 319 g/mol
Shokir [20](i1)   
(i2)   
(i3)   
; ; ;  
; ; ;  
; ; ;  
; ; ; 		Limitations: 32.2 < T < 112.2°C; 6.9 < <30.28 MPa; 185 < < 268 g/mol
Chen [21](j)  Limitations: 32.2 < T < 118.3°C; 6.9 < < 28.17 MPa; 185 < < 249 g/mol
Ju [22](k1)   
(k2)   
(k3)   
The detailed parameters refer to [18]		Limitations: < 40 MPa