Water saturation

Exploring for Oil and Gas Traps
Series	Treatise in Petroleum Geology
Part	Predicting the occurrence of oil and gas traps
Chapter	Predicting reservoir system quality and performance
Author	Dan J. Hartmann, Edward A. Beaumont
Link	Web page
Store	AAPG Store

Water saturation (S_w) of a reservoir is a function of height above free water (h) and pore type. S_w interpretations should be made accounting for h, r₃₅, and pore throat size distribution in the reservoir. The Archie equation is the most widely used method of determining S_w.

This section discusses how to calculate S_w from the Archie equation using various numerical and graphical techniques and how to interpret the results.

See also

• Determining water saturation
• Interpreting water saturation

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