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Lecture itemsLecture items
* Theory of measurement of other resistivity logs.
* Log formats.
* Factors affecting on log measurements.
* Applications.
MSFL, LLS and LLD logsMSFL, LLS and LLD logs
Theory of Theory of Induction Induction
logslogs
Factors affecting on resistivity Factors affecting on resistivity logginglogging
Borehole sizeMud cake type and thicknessInvasion diameterBed thickness and tool resolutionDepth of investigation
Application of Resistivity logsApplication of Resistivity logs
Saturation determinationLithology identificationSource Rock identificationLocating of hydrocarbon bearing zonesDetermination of shale volume Localization of over-pressured zonesCorrelation purposes
Where: Sw = water saturation F = formation factor (a/fm) a = tortuosity factor m = cementation exponent Rw = resistivity of formation water Rt = true formation resistivity as measured by resistivity log n = saturation exponent (most commonly 2.0)