Chapter 5D

5D. Composite stream analysis Back to Main

This page is used to do the composite stream analysis. The best way to sample a two-phase stream is to use a test separator. In this you sample and analyze the liquid and gas streams leaving, as well as measure their flow rates. These results may then be recombined to form a composite (or total) stream analysis.

##### How do I carry out this calculation?

To calculate the composite stream analysis the Liquid relative density, Gas oil ratio, Gas rate, Liquid Mole %, and Gas Mole % of the mixture must be entered into their entry spaces. To do so use the mouse to click the courser in the entry spaces and input the data. If there is any C6+ present in the mixture click and shade the "Is C6+ present" box and enter the molecular weight. Once this has been done, select Run to execute the solution.

##### Definitions of the variables and where to obtain the unknown data

Liquid Relative Density is the density of a liquid divided by the density of pure water. At 15ºC [60ºF] the density for pure water is 1.0 g/cm³.

Gas oil ratio is found through analysis of the two-phase (gas/oil) stream, and is the amount of unit of gas per unit of oil.

Gas flow rate is the flow capacity.

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