Category Archives for Separation

Process Flowsheet

Figure 2-7 is an enlargement of the FWKO of Figure 2-1 to show the amount of detail that would be expected on a process flowsheet. A flash calculation is needed to determine the amount of gas and liquid that each … Continue reading

20. August 2009 by Jack
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Two Phase vs Three Phase Separator

In our example process the high- and intermediate-stage separators are two-phase, while the low-pressure separator is three-phase. This is calleda “free water knockout” (FWKO) because it is designed to separate the free water from the oil and emulsion, as well … Continue reading

20. August 2009 by Jack
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Separator Operating Pressure

The choice of separator operating pressures in a multistage system is large. For large facilities many options should be investigated before a final choice is made. For facilities handling less than 50,000 bpd, there are practical constraints that help limit … Continue reading

20. August 2009 by Jack
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Fields With Different Flowing Tubing Pressures

The discussion to this point has focused on a situation where all the wells in a field produce at roughly the same flowing tubing pressure, and stage separation is used to maximize liquid production and minimize compressor horsepower. Often, as … Continue reading

20. August 2009 by Jack
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Selection of Stages

As more stages are added to the process there is less and less incremental liquid recovery. The diminishing income for adding a stage must more than offset the cost of the additional separator, piping, controls, space, and compressor complexities. It … Continue reading

20. August 2009 by Jack
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Stage Separation

Figure 2-5 deals with a simple single-stage process. That is, the fluids are flashed in an initial separator and then the liquids from that separator are flashed again at the stock tank. Traditionally, the stock tank is not normally considered … Continue reading

20. August 2009 by Jack
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Initial Separator Pressure

Because of the multicomponent nature of the produced fluid, the higher the pressure at which the initial separation occurs, the more liquid will be obtained in the separator. This liquid contains some light components that vaporize in the stock tank … Continue reading

20. August 2009 by Jack
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