Evaluating source-rock quality using wireline logs is a practical and economic tool for reservoir characterization. Wireline data of the Lewis Shale in the Green River Basin, Wyoming was analyzed to determine if source-rock quality indicators could be found. Gamma-ray tool response to uranium was found to be a good predictor of total organic carbon (TOC) values. The viability of using U maa vs. ρ maa crossplots as a method to evaluate source-rock quality is less certain, as TOC signatures are overwhelmed by host-rock mineralogy.
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