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 .