How are the partial pressures of alkane gas and water vapor calculated under high-pressure conditions?
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I would like to ask the experts: Alkanes and water vapor are two distinct liquid phases under liquid conditions; then, under high pressure conditions, cannot conventional equation of state and activity models be used to calculate their partial pressures in reservoirs? And under high-pressure conditions, can their partial pressures in the gas phase not be treated using ideal gas laws? If that doesn’t work, I would appreciate it if experts could tell me how to calculate it Let’s write about everyone first.
Temperature; the saturated vapor pressure of water can be determined using temperature. Pressure, absolute pressure; by removing the partial pressure of water vapor, what remains is the partial pressure of the hydrocarbon gases.
Thank you. Right now, all I know is the pressure; I hope to find the system temperature and the composition of the components when an alkane gas and water vapor are in equilibrium. Moreover, the method you provided seems to be one for ideal gas conditions; hasn’t the fugacity coefficient been taken into account?
I might have overlooked one thing – we mainly deal with water. A phrase I often say is that \"much of the oil product is obtained by separating it from water,\" so I assume that the water content in oil and gas is at least saturated, with any excess being mist entrained within it.