Pickett Plot

• Pickett Plot generation and annotation
• Generates Pickett Plot
• Adds water saturation contours
• Adds BVW contours
• Adds permeability contours
• Colors points according to attribute
• Adds capillary pressure contours

The Annotated Pickett Plot

• Log-log resistivity-porosity crossplot
• based on transformed Archie equation
  • log R_t = log(a R_w) - n log S_w- m log F
• reveals porosity-water saturation patterns
• Color-coding of third attribute
• depth, gamma ray, photoelectric factor, . . .
• Contours of reservoir parameters
• water saturation, bulk volume water, permeability, capillary pressure

Contours on the Pickett Plot

• SW, BVW: from Archie equation
• Permeability (Wylie and Rose, 1950)
• log k = log P + Q log F - R log S_{w i}
• P, Q, R: Set in Parameters column
• Timur (1968) constants (sandstone) default
• Assumes irreducible saturation (S_{w i})
• Capillary pressure
• from user-specified pressure-saturation curves

"Super Pickett" Plot