SPE Formation Evaluation · 1995 · 33 citations · 4 references
EngineeringEarth SciencesGeologyMineralogyReservoir CharacterizationSubsurface Fluid FlowCore AnalysisFluid SaturationPore Structure AnalysisPorosity AnalysisRock PropertiesRock-fluid InteractionsFluid DistributionIrreducible Water SaturationPore-size DistributionReservoir Rock WettabilityResidual Oil SaturationSandstone WettabilityWater SaturationWettability Studies
Summary Cryo-scanning electron microscopy (Cryo-SEM) is used to study the wettability of reservoir rocks from fluid distribution at irreducible water saturation, Swi, and residual oil saturation, Sor. Results on mixed-wettability cores point out the importance of composition, distribution, and accessibility of minerals in determining the macroscopic behavior of the rocks. For the studied samples, wettability of sandstones is related to the presence of kaolinite, while wettability of carbonates seems to be related to pore-size distribution.
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