Porosity ϕ

Porosity ϕ

1. Depositional history and pore origin

   • Secondary ϕ
     • Fracture ϕ
     • diagenetic ϕ
       • intragranular ϕ
       • vugular ϕ
     • organoporosity
   • Primary ϕ
     • intergranular ϕ
     • intracrystaline ϕ

2. petrophysical ϕ

   • Total ϕ
     • Connected ϕ
       • Effective ϕ
     • isolated ϕ
     • trapped ϕ

3. fluid type

   • Water
     • capillary water ϕ
       • adhesive water ϕ
       • irreducible water ϕ
     • Sorbed water ϕ
       • clay bound water ϕ
         • exhange cation water
         • interlayer water
       • adhesive water ϕ
     • free water ϕ
   • hydrocarbon ϕ

4. measurement tool

   • sonic ϕ
   • density ϕ
   • neutron ϕ