Hydrocarbon reservoir saturation logging

Abstract

Systems and methods for developing a reservoir that include obtaining well log data (conducting nuclear magnetic resonance (NMR), gamma ray (GR), and resistivity logging operations to generate corresponding NMR, GR and formation true resistivity logs for one or more wells in the reservoir), determining rock property data based on the well log data, determining a 'water-zone baseline' based on the rock property data (e.g., based on a cross-plot of rock properties determined from the NMR and GR logs and resistivity values), and determining water saturation data based on the water-zone baseline.