Patent ID: 11912932
Assignee: CHINA UNIVERSITY OF PETROLEUM (EAST CHINA)
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  Y | IPC C  E

Claim 2:
3. The encapsulated polymer flooding method for enhancing oil recovery according to claim 1, wherein a criterion for determining the elastic modulus is represented by formula (II):

E=(0.1+bkmn)E0  (II)

wherein, E is the elastic modulus of the outer shell of the capsule, b is a coefficient with a value range of 0.01-5, kmn is an intra-reservoir permeability ratio, E0 is a reference elastic modulus taking, E
    0
   
   =
   
    
     σ
     0
    
    ⁢
    
     
      ϕ
      
       8
       ⁢
       0
       ⁢
       0
       ⁢
       0
       ⁢
       
        τ
        2
       
       ⁢
       k
      
     
    
   
  
  ,
  and
 

 σ0 is reference interfacial tension.