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Resistivity Logs

Resistivity Logs. ILD (deep). MSFL. SFL. High deep resistivity means: Hydrocarbons Tight streaks (low porosity) Low deep resistivity means: Shale Wet sand Separation between resistivities means: The formation fluid is different from the drilling fluid

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Resistivity Logs

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  1. Resistivity Logs ILD (deep) MSFL SFL • High deep resistivity means: • Hydrocarbons • Tight streaks (low porosity) • Low deep resistivity means: • Shale • Wet sand • Separation between resistivities means: • The formation fluid is different from the drilling fluid • The formation is permeable to the drilling fluid Deep, Medium, and Shallow refers to how far into the formation the resistivity is reading (4 ft, 2 ft, few in) Formation Fluid different from Drilling Fluid Formation Fluid similar to Drilling Fluid Courtesy of ExxonMobil

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