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Chemical Injection

 

Course objectives:

 

Generally one-third to one-half of the original oil-in-place may remain in a reservoir as it reaches abandonment due to its economic limit. The primary reasons are heterogeneity of the reservoir, unfavorable fluid properties, inefficient nature of the displacement process, oil price and production cost considerations. The secondary reasons, however, are: inappropriate development, inefficient reservoir management practices, and escalating costs of remedial interventions/corrective measures and producing operations.

This course covers the chemical recovery improvement possibilities that present themselves at all stages in the reservoir life cycle. It thereby enables one to timely select the most beneficial method and set realistic expectations on production behavior changes and recovery improvement. The impacts of the selected method on personnel training, technology transfer, and facility modification are also covered. It is light on theoretical equations, but it scrutinizes these to comprehend importance of significant parameters. It utilizes case studies from projects around the world; their analyses and interpretations aid to the understanding of the material.

 

Course contents:

                               

               Introduction to EOR Methods



  •          Need for IOR/EOR
    .
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  •          EOR methods (description, classification and status), EOR reserves
    .
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  •          Screening criteria
    .
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  •          Environmental aspects of EOR methods
    .
  •  

  •          Basic equations for fluid flow in Porous Media
    .
  •                                   

                 Microscopic fluid displacement in reservoir



  •          Displacement forces in the reservoir
    .
  •  

  •          Capillary, viscous and gravitational forces
    .
  •  

  •          Factors affecting phase trapping
    .
  •  

  •          Mobilization and displacement of trapped phases
    .
  •  


    Macroscopic fluid displacement in reservoir


  •          Reservoir fluid PVT properties; rock properties
    .
  •  

  •          Material balance
    .
  •  

  •          Mobility ratio
    .
  •  

  •          Displacement efficiency Buckley-Leverett theory and Welge method
    .
  •  

  •          Areal and vertical sweep efficiencies; oil recovery efficiency
                                         

    Factor affecting oil recovery


  •          Comparative performance of different EOR methods (miscible, thermal, chemical)
    .
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  •          Screening criteria and selection of most appropriate EOR method(s)
    .
  •  

    Chemical flooding


  •          Definition of chemical flooding
    .
  •  

  •          Describe displacement fundamentals—vertical and areal sweep efficiency
  •  

  •          Applicability of the process
  •  

  •          Other chemical test for sweep improvement and profile modifications (gels and foam)



  •          Micellar/ polymer flood, Surfactant flood



  •         Using other chemical methods



  •        Rock Fluid interaction



  •        Factors affecting phase behavior and IFT



  •        Displacement mechanisms under chemical flood



  •        Analytical model of chemical flood



  •        Selection criteria and design procedures



  •        Laboratory Tests for Chemical Floods
  •  

 


 

Course duration:   5 days