Patent ID: 11874211
Assignee: XI'AN SHIYOU UNIVERSITY
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 1:
2. A device comprising:
a non-transitory memory storage comprising instructions; and
one or more processors in communication with the memory storage, wherein the instructions, when executed by the one or more processors, cause the device to:
collect experiment data in a N-Hexane vapor adsorption experiment on a sample made from a shale, wherein the experiment data comprises a plurality of adsorbed amounts of N-Hexane absorbed by the sample under a plurality of pressures of N-Hexane vapor, and the plurality of adsorbed amounts of N-Hexane corresponds one-to-one to the plurality of pressures of N-Hexane vapor;
perform a curve fitting on the plurality of adsorbed amounts of N-Hexane to obtain a microscopic occurrence curve and an analytic expression of the microscopic occurrence curve, wherein the analytic expression quantitatively describes a first relationship that is, V
    m
   
   =
   
    
     
      V
      ⁡
      (
      
       1
       -
       
        A
        ⁢
        h
       
      
      )
     
     ⁢
     
      (
      
       1
       +
       
        K
        ⁢
        h
       
       -
       
        A
        ⁢
        h
       
      
      )
     
    
    
     K
     ⁢
     h
    
   
  
  ,
 

 wherein h is an N-Hexane vapor pressure, V is an adsorbed amount of N-Hexane of the plurality of adsorbed amounts of N-Hexane, Vm is a maximum adsorption amount of monolayer adsorption of N-Hexane in the sample, and A and K are two values obtained based on the curve fitting;
determine a plurality of maximum adsorption amount of monolayer adsorption of N-Hexane in the sample according to the first relationship, the plurality of adsorbed amounts of N-Hexane and the plurality of pressures of N-Hexane vapor, wherein the plurality of maximum adsorption amounts of monolayer adsorption of N-Hexane corresponds to a plurality of maximum adsorption amounts of monolayer adsorption of oil in the shale, and the plurality of maximum adsorption amounts of monolayer adsorption of oil corresponds one-to-one to the plurality of adsorbed amounts of N-Hexane;
calculate a plurality of adsorbed oil film thicknesses in the shale according to the plurality of maximum adsorption amounts of monolayer adsorption of oil and the plurality of adsorbed amounts of N-Hexane, wherein the plurality of adsorbed oil film thicknesses corresponds one-to-one to the plurality of maximum adsorption amounts of monolayer adsorption of oil, the plurality of adsorbed oil film thicknesses corresponds one-to-one to the plurality of adsorbed amounts of N-Hexane, an absorbed oil film thickness of the plurality of absorbed oil film thicknesses being an average thickness of oil films adsorbed on walls of pores in the shale, and each of the plurality of adsorbed oil film thicknesses in the shale is calculated through a second relationship, t
   =
   
    
     d
     1
    
    ⁢
    
     V
     
      V
      m
     
    
   
  
  ,
 

 wherein t is an adsorbed oil film thickness of the plurality of adsorbed oil film thicknesses in the shale, d1 is an N-Hexane molecular diameter, V is the adsorbed amount of N-Hexane in the first relationship, and Vm is the maximum adsorption amount of monolayer adsorption of N-Hexane in the first relationship;
calculate a plurality of valid diameter values under the plurality of pressures of N-Hexane vapor according to a third relationship between the N-Hexane vapor pressure in the first relationship and a diameter value of a valid pore, wherein the valid pore is a pore in the shale with a capability of storing oil under the N-Hexane vapor pressure, the diameter value of the valid pore is a distance between a center of the valid pore and a center of a molecular of a plurality of molecules that enclose and form the valid pore, and the third relationship is:, ln
    ⁡
    (
    h
    )
   
   =
   
    
     
      6
      ⁢
      
       7
       .
       5
      
      ⁢
      1
     
     
      
       2
       ⁢
       
        d
        2
       
      
      -
      
       
        0
        .
        7
       
       ⁢
       7
      
     
    
    [
    
     
      
       
        3
        .
        9
       
       ⁢
       
        76
        ⨯
        
         10
         
          -
          3
         
        
       
      
      
       
        (
        
         
          2
          ⁢
          
           d
           2
          
         
         -
         
          
           0
           .
           3
          
          ⁢
          8
          ⁢
          5
         
        
        )
       
       3
      
     
     -
     
      
       
        1
        .
        7
       
       ⁢
       
        26
        ⨯
        
         10
         
          -
          6
         
        
       
      
      
       
        (
        
         
          2
          ⁢
          
           d
           2
          
         
         -
         
          
           0
           .
           3
          
          ⁢
          8
          ⁢
          5
         
        
        )
       
       9
      
     
     -
     
      
       0
       .
       0
      
      ⁢
      6
      ⁢
      0
      ⁢
      3
      ⁢
      8
     
    
    ]
   
  
  ,
 

 wherein “ln” represents natural logarithm, his the N-Hexane vapor pressure and d2 is the diameter value of the valid pore;
obtain an oil distribution in the shale according to the plurality of adsorbed amounts of N-Hexane and the plurality of valid diameter values, the oil distribution in the shale being a distribution of oil within pores of different sizes in the shale; and
perform an exploiting of shale oil or tight oil according to the plurality of adsorbed oil film thicknesses and the oil distribution in the shale.