Patent ID: 11965844
Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 12:
13. A method according to claim 12, wherein:
T2lm is calculated from a free fluid distribution, which is determined from integration or addition of the probability distribution function of capillary pressure values as a function of transverse relaxation values of the form, f
    
     F
     ⁢
     F
    
   
   (
   
    T
    2
   
   )
  
  =
  
   
    1
    A
   
   ⁢
   
    
     ∫
     
      
       P
       c
      
      =
      
       Pc
       -
       min
      
     
     
      
       P
       c
      
      =
      
       Pc
       -
       cut
      
     
    
    
     
      f
      ⁡
      (
      
       
        P
        c
       
       ,
       
        T
        2
       
      
      )
     
     ⁢
     
      
       dP
       c
      
      .
     
    
   
  
 

where A is the normalization parameter defined as

A=∫T2minT2maxdT2∫Pc minPc maxƒ(Pc,T2)dPc,

where ƒ(Pc,T2) is the probability distribution function of capillary pressure values as a function of transverse relaxation values,
Pc represents a dimension of the capillary pressure values,
Pc-max represents a maximum capillary pressure value,
Pc-min represents a minimum capillary pressure value,
Pc-cut represents a capillary pressure value at which fluid is considered bound,
T2 represents a dimension of the transverse relaxation values,
T2max represents a maximum T2 value, and
T2 min represents a minimum T2 value.