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- W2063732802 abstract "Abstract Wettability is an important factor, which affects the flow behavior in oil reservoirs. It has a profound effect on the shape of relative permeability and capillary pressure curves and consequently on oil displacement processes in porous media. This paper presents experimental measurements on core samples where the effect of wettability is investigated on connate water, residual oil, oil and water permeability end points, relative permeability and capillary pressure curves. The paper summarizes the main findings of few years of data collection on several cores from different carbonate fields in the Middle East, and a comparison with clastic data is made when appropriate. The data shows very low connate water for most carbonate fields investigated in this study even for low permeability rocks, 1 md. The residual oil saturation after restoring wettability was measured to be less than 10% for both carbonate and sandstone fields. For water-wet samples a residual oil of around 30% is measured. A distinct difference was found in the dependence of residual oil saturation on initial oil saturation for water-wet and mixed-wet cores. For water-wet samples Sor increased almost linearly with Soi, however; for mixed-wet samples Sor was found to be constant for a very wide range of Soi values. For water-wet samples we often measured high oil relative permeability end point, Kro(Swc)>1.0, and it decreased as the wettability changed to mixed-wet or oil-wet. The water relative permeability end point is low for water-wet samples and increased for mixed-wet or oil-wet samples. As demonstrated in the field case discussed in this paper, the findings of this study have important implications for field development and hydrocarbon recovery." @default.
- W2063732802 created "2016-06-24" @default.
- W2063732802 creator A5085768411 @default.
- W2063732802 date "2002-10-13" @default.
- W2063732802 modified "2023-09-28" @default.
- W2063732802 title "The Effect of Wettability on Saturation Functions and Impact on Carbonate Reservoirs in the Middle East" @default.
- W2063732802 cites W2016222379 @default.
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- W2063732802 doi "https://doi.org/10.2118/78515-ms" @default.
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