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Kelsey Recompletion - Coggle Diagram

- - - - Water Saturation
        
        First need to determine Rw
        
        Sample analysis
        
        $250/sample
        
        Gather at wellhead fluid separator
        
        Swab sample. In hind sight we should have caught, cataloged and stored a sample from every swab.
        
        Historical analyses
        
        Rw catalog (already ordered)
        
        Log analysis of wet Zone
        
        Always sense check this against other wells. Should not be drastically different. (unless major effects of injection of non production water
        
        Archie's or Shale-Adjusted Archies
        
        Frio Sands are clean enough for simple Archie's
        
        Compare Sw to Swi
        
        Detailed core analysis
        
        Historically +/-35%
        
        Sw=Swi -> Hydrocarbon Production
        
        Sw > Swi -> Expect immediate water production
        
        Sw>>Swi -> Expect 100% water production
      - Oil or gas
        
        Neutron/Density Log
        
        Gas Effect
        
        No Porosity Logs?
        
        Correlation?
      - Porosity
        
        Density/Neutron Logs
        
        Spot check with Core analysis
        
        Core Data
        
        Data from direct offset wells
        
        Old Saying: No porosity, no analysis
      - Permeability
        
        Fieldwide Core Porosity to Permeability Correlation
        
        Zone-specific porosity vs perm correlation
        
        Core analysis
        
        Use offset test data to calculate a PI and a calculate perm from that
    - - Drainage ( decreased SBHP)
        
        This can be a rabbithole. If you know there has been production since the log was run, you can use that production and material balance to calculate an estimated pressure drop. Unfortunately, this requires determining a lot of variables from material balance from a previous production period and pressure change
      - Swept?
        
        Use offset production to track the change in the rise of the OWC
      - Will we produce differently than they have in the past?
    - - Compare log to offset producers
      - Static Bottomhole Pressure (RFT)
      - Productivity Index
      - Volumetrics
        
        Assume abandonment pressure and drainage area
      - Decline curve analysis of offsetproducers
    - - Strucutre Map
      - Historical Production
      - Offset Completions
        
        Log Data
        
        Perf Depths
        
        SBHP
        
        Productivity Index