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SUBSURFACE ENVIRONMENT, TYPE - Coggle Diagram

- - - - LITHOSTATIC PRESSURE
        
        Caused by the pressure of the rock and transmitted through the subsurface by grain-to-grain contacts.
      - FLUID PRESSURE
        
        Caused by the fluids within the pore space
  - - - Water which can’t be removed during the production of oil and gas from a reservoir.
    - - Free to move in and out of pores to response a pressure differential.
    - - Genesis
        
        JUVENILE WATERS
        
        MIXED WATERS
        
        CONNATE WATERS
        
        METEORIC WATERS
      - Chemistry
        
        Eh
        
        pH
        
        Relationship with diagenesis and porosity evolution is important
      - Analysis
        
        measurement of the resistivity of formation water (Rw)
        
        hence hydrocarbon saturation
        
        essential for the accurate assessment of Sw