PPT Slide
- Resistivity-Porosity Cross Plot (Pickett)
- Determination of Water Saturation (Sw)
- Determination of Bulk Volume Water (BVW)
- Cross Plot Pattern
- Cores and samples Are Necessary to Define Pore Type/Petrofacies
- Cross Plot Patterns
- Vertical--Near or at Irreducible Water
Saturation (BVW and/or Resistivity Constant)
- Horizontal-- Reservoir in Transition (Porosity Constant)
- Parallel to Sw Lines—Indication of Changes in Pore Geometry
(Decreased Resistivity and Increased Porosity Indicates a
Higher BVW and Smaller Pores with Greater Surface Area;
Increased Resistivity and Decreased Porosity Indicates a
Lesser BVW and Lower Surface Area
- Concentration of Data Points—
At or Near Irreducible Water Saturation