The data of natural gamma ray spectrum logging are of well conformity with the contents of thorium, uranium and potassium obtained by surface gamma ray survey, laboratory analysis and aerial gamma ray spectrum survey.

Using natural gamma-ray spectroscopy log method to determine clay mineral content;

The natural gamma-ray spectroscopy log method could not only identify the types of the clay mineral, but also determine the content of the clay mineral in the reservoir.

Karst carbonate reservoir division and contrast based on natural gamma ray spectrometry logging in Tahe Oilfield;

Correction factor of spectral gamma-ray log for associated uranium deposit in the oilfield of Qianjiadian Sag;