Determining water saturation

Water saturation can be measured directly from a sealed core, which is an expensive method, or it can be calculated from the Archie equation, which is less expensive. S_w can also be estimated using a graphical representation of the Archie equation known as the Pickett crossplot. This subsection discusses how to calculate S_w using the Archie equation, how to determine values for variables of the Archie equation, and how to make a Pickett crossplot.

See also

• Calculating Sw from the Archie equation
• Determining Rt
• Determining porosity from density-neutron logs
• Calculating Rw from SP logs
• Constructing a Pickett plot

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