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- W2000385446 abstract "Clay-minerals dispersed in reservoir sands affect electric log response and register reduced resistivity values. Natural zeolites however, with large microporosities and water content could have a greater affect on resistivity measurements. Resistivity values were measured on a series of artificial cores prepared by mixing and compacting various percentages each of clinoptilolite, smectite and illite, with a medium-grained, moderately sorted quartz sand. Various concentrations of NaCl solution mixed with 39 API crude oil were circulated through each core. Impedance measurements were taken, resistance values segregated, and resistivities determined for each core. Water saturation values were calculated from the empirical resistivity values and porosities using a modified Simandoux equation. These values appeared to be much higher for those cores which contained the zeolite clinoptilolite. Clinoptilolite, when dispersed in a simulated reservoir sand and treated as a dispersed smectite or illite, produced inflated saturation values. This inflation effect is thought to be due to the more extensive microporosity and larger micropore water content of the zeolite. Therefore, from the empirical aspect, resistivity measurements of reservoir sands containing a dispersed zeolite, rather than a clay-mineral, would probably yield misleading water saturation values." @default.
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- W2000385446 date "1991-02-01" @default.
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- W2000385446 title "Zeolite and clay-mineral induced resistivity in simulated reservoir sand" @default.
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- W2000385446 doi "https://doi.org/10.1016/0920-4105(91)90065-u" @default.
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