Relation between concentration of K, Th, or U and recorded total gamma ray signal
Input(s)
\(C_{T h}:\) Thorium Concentration (ppm)
\(C_{U}\): Uranium Concentration \((\mathrm{ppm})\)
\(C_{K}\): Potassium Concentration (wt %)
Output(s)
\(\gamma\): Total Gamma Ray (API units)
Formula(s)
\[
\gamma=4 * C_{T h}+8 * C_{U}+C_{K}
\]
Reference(s)
Bassiouni, Z., 1994, Theory, Measurement, and Interpretation of Well Logs. SPE Textbook Series Vol. 4. Chapter 7, Page: 152.