Composite capture cross section of the formation (Schlumberger thermal decay time tool)

Input(s)

$\tau$: Time Required for Neutron to Diminish to $37 \%$ (s)

Output(s):

г: Composite Capture Cross Section of Formation (dimensionless)

Formula(s)

$$ \Sigma=\frac{4.55}{\tau} $$

Reference(s)

Bassiouni, Z., 1994, Theory, Measurement, and Interpretation of Well Logs. SPE Textbook Series Vol. 4. Chapter 9, Page: 181 .