The UPSTREAM unit operation allows the user to perform a certain number of tasks that are typical in oil and gas exploration and production activities. However, some of these operations are useful in other types of flow sheets. The features covered by the UPSTREAM unit are:
Stream Selector (SELECTOR): Allows the user to run the same flowsheet repeatedly with changing inlet stream characteristics (temperature, flow rate, and composition). The user declares all the possible feed streams and selects one to feed the UPSTREAM unit. Combining this unit with the CASESTUDY option facilitates the comparison of flowsheet feed stocks.
Gas Oil Ratio (GOR): Allows the user to calculate the Gas Oil Ratio on the basis of a series of isothermal flashes.
Liquid Dropout (DROPOUT): Allows the user to calculate the liquid dropout curve for a gas condensate reservoir fluid as a function of pressure at constant temperature.
Relative Volume (RELVOL): Allows the user to calculate the volume as a function of pressure at constant temperature.
Constant Volume Depletion (CVD): Allows the user to simulate the emptying of a vessel at constant temperature and constant volume.
Saturation Pressure: Allows the user to calculate the Saturation Pressure at a given temperature.