a. Calculate the resistivity at 150F of a sandstone that is 100% saturated with water. The water salinity is 20,000 ppm and the sand porosity is 12%. b. Calculate the resistivity at 300F of a gas-bearing sand- stone if gas saturation=50%, formation water salinity= 200,000 ppm, and formation porosity=35%. c. Can the absolute value of the resistivity, R,, indicate the presence or absence of hydrocarbons? Explain. a. Calculate the resistivity at 150F of a sandstone that is 100% saturated with water. The water salinity is 20,000 ppm and the sand porosity is 12%. b. Calculate the resistivity at 300F of a gas-bearing sand- stone if gas saturation=50%, formation water salinity= 200,000 ppm, and formation porosity=35%. c. Can the absolute value of the resistivity, R,, indicate the presence or absence of hydrocarbons? Explain. a. Calculate the resistivity at 150F of a sandstone that is 100% saturated with water. The water salinity is 20,000 ppm and the sand porosity is 12%. b. Calculate the resistivity at 300F of a gas-bearing sand- stone if gas saturation=50%, formation water salinity= 200,000 ppm, and formation porosity=35%. c. Can the absolute value of the resistivity, R,, indicate the presence or absence of hydrocarbons? Explain. a. Calculate the resistivity at 150F of a sandstone that is 100% saturated with water. The water salinity is 20,000 ppm and the sand porosity is 12%. b. Calculate the resistivity at 300F of a gas-bearing sand- stone if gas saturation=50%, formation water salinity= 200,000 ppm, and formation porosity=35%. c. Can the absolute value of the resistivity, R,, indicate the presence or absence of hydrocarbons? Explain.