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This document describes a method for using gamma ray (GR) and resistivity (Rt) well logs to estimate total organic carbon (TOC) content in shale formations. TOC prediction from wireline logs provides a continuous record without sampling issues, compared to geochemical analyses. Elevated GR, Rt, and other log responses may indicate higher TOC potential. The method builds on the ∆logR technique by using GR instead of porosity, defining the separation gap between standardized GR and Rt curves in "source" shale

Author
heslopk
Language
EN