Which log is the Gamma Ray Log?

Which log is the Gamma Ray Log?

• A. Neutron Log
• B. Gamma Ray Log
• C. SP Logs
• D. Resistivity Log

Answer: (B)

Natural gamma radiation is emitted by rocks, and the log that records this signal is the Gamma Ray log. It’s used to differentiate lithologies, especially to spot shale-rich intervals, which show higher readings, from cleaner sands or carbonates, which read lower. The other options measure different properties: a neutron log responds to hydrogen content and is commonly used for porosity; an SP (spontaneous potential) log tracks natural electrical potential for stratigraphic correlation; a resistivity log measures how rocks resist electrical current, informing fluid content and saturation. Because the question asks which log specifically captures natural gamma radiation from formations, the Gamma Ray log is the correct and best choice.

Natural gamma radiation is emitted by rocks, and the log that records this signal is the Gamma Ray log. It’s used to differentiate lithologies, especially to spot shale-rich intervals, which show higher readings, from cleaner sands or carbonates, which read lower. The other options measure different properties: a neutron log responds to hydrogen content and is commonly used for porosity; an SP (spontaneous potential) log tracks natural electrical potential for stratigraphic correlation; a resistivity log measures how rocks resist electrical current, informing fluid content and saturation. Because the question asks which log specifically captures natural gamma radiation from formations, the Gamma Ray log is the correct and best choice.