Abstract: The present disclosure relates to a method for predicting the pressurization rate of an oil tank. An embodiment of a method includes obtaining plant information data, classifying an operating period, selecting a modeling data range; determining total gas volume in the tank through data from an oil tank liquid level sensor, determining an average pressure of the gas phase in the tank through the data from the oil tank top pressure sensor, determining an average temperature of the gas phase in the tank through data from an oil tank top temperature sensor, setting the desired oil flow rate, predicting the future pressure in relation to the desired oil flow rate, predicting violation of the critical pressure, determining a period of time of weather calm, and setting a new oil production setpoint.