Patent ID: 11953633
Assignee: CHINA UNIVERSITY OF PETROLEUM (EAST CHINA)
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 1:
2. The method according to claim 1, wherein the set of initial elastic parameters comprises:, C
   
    1
    ⁢
    1
   
  
  =
  
   
    (
    
     1
     +
     
      2
      ⁢
      ε
     
    
    )
   
   ⁢
   ρ
   ⁢
   
    v
    
     p
     ⁢
     0
    
    2
   
  
 

 
  
   C
   
    1
    ⁢
    2
   
  
  =
  
   
    
     (
     
      1
      +
      
       2
       ⁢
       ε
      
     
     )
    
    ⁢
    ρ
    ⁢
    
     v
     
      p
      ⁢
      0
     
     2
    
   
   -
   
    2
    ⁢
    
     (
     
      1
      +
      
       2
       ⁢
       γ
      
     
     )
    
    ⁢
    ρ
    ⁢
    
     v
     
      s
      ⁢
      0
     
     2
    
   
  
 

 
  
   C
   
    1
    ⁢
    3
   
  
  =
  
   
    ρ
    ⁢
    
     
      
       [
       
        
         
          (
          
           1
           +
           
            2
            ⁢
            δ
           
          
          )
         
         ⁢
         
          v
          
           p
           ⁢
           0
          
          2
         
        
        -
        
         v
         
          s
          ⁢
          0
         
         2
        
       
       ]
      
      ⁢
      
       (
       
        
         v
         
          p
          ⁢
          0
         
         2
        
        -
        
         v
         
          s
          ⁢
          0
         
         2
        
       
       )
      
     
    
   
   -
   
    ρ
    ⁢
    
     v
     
      s
      ⁢
      0
     
     2
    
   
  
 

 
  
   C
   
    3
    ⁢
    3
   
  
  =
  
   ρ
   ⁢
   
    v
    
     p
     ⁢
     0
    
    2
   
  
 

 
  
   C
   
    4
    ⁢
    4
   
  
  =
  
   
    C
    
     5
     ⁢
     5
    
   
   =
   
    ρ
    ⁢
    
     v
     
      s
      ⁢
      0
     
     2
    
   
  
 

 
  
   C
   
    6
    ⁢
    6
   
  
  =
  
   
    (
    
     1
     +
     
      2
      ⁢
      γ
     
    
    )
   
   ⁢
   ρ
   ⁢
   
    v
    
     s
     ⁢
     0
    
    2
   
  
 

where, the C11, the C12, the C13, the C33, the C44, the C55 and the C66 are initial elastic parameters, respectively, the ε, the γ and the δ are parameters of anisotropy, respectively, the νp0 is a P-wave velocity of a medium along a symmetry axis, the νs0 is a S-wave velocity of the medium along the symmetry axis, and the ρ is a medium density field.