Dictionary:Radioactive-tracer log

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{{#category_index:R|radioactive-tracer log}} A log involving the detection of radioactive materials dissolved in water or oil to determine the movement of the fluids. A quantity of radioactive material (a slug) might be injected into the fluid and movement of the slug monitored to detect casing leaks or points of fluid entry or exit; or points where fluid enters formations might be shown by residual radioactivity at those levels.