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4. A carbonate rock layer was logged and found to have a porosity of 18%. The water resistivity is estimated to be 0.2 ohms-meters, and the true resistivity was measured

to be 10 ohms-meters (assume m=n=2). (4 points) (a) What is the water saturation? (in fraction, two decimals) (b) What is the oil saturation? (in fraction, two decimals)

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