Patent ID: 11940437
Assignee: SAUDI ARABIAN OIL COMPANY
Field: Measurement (Instruments)
Classification: CPC G  E | IPC E  G

Claim 17:
18. The computer-readable medium of claim 17, wherein testing the reservoir core sample to obtain a set of average water saturation (Sw,avg) and imbibition capillary pressure (Pci) data points comprises:
determining average water saturation (Sw,avg) data points from measured volumes of expelled oil from the reservoir core sample for a set of rotational speeds of the centrifuge test; and
determining imbibition capillary pressure (Pci) using the following equation:, P
    
     c
     ⁢
     i
    
   
   =
   
    
     1
     2
    
    ⁢
    Δ
    ⁢
    ρ
    ⁢
    
     
      ω
      2
     
     (
     
      
       r
       3
       2
      
      -
      
       r
       1
       2
      
     
     )
    
   
  
  ;
 

where Δρ is a density difference between oil and water, ω is a rotational speed of the centrifuge of the centrifuge test, r3 is a distance between an inlet end of the reservoir core sample and a rotational axis of the centrifuge, r1 is the distance between an outlet end of the reservoir core sample and the rotational axis of the centrifuge.