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Detailed Analysis Of Pressure Drop In A Large Diameter Vertical Pipe
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This leads to some level of complexity as regards
to the identification of the physical properties of the individual
phases, the flow pattern, the relative volume occupied by the separate
phases inside the pipe, and most importantly the implication of the
phase separation on the pressure drop along the well tubing string.
Although
most if not all calculations for flow lines in multiphase production
systems have been and continue to be based on empirical correlations,
there is now a strong tendency to introduce more physically based (so
called mechanistic) approaches to supplement if not replace
correlations. This is because the latter are well known for their
unreliability when applied to systems operating under conditions
different to those from which the correlations are derived; such
conditions encompass: pressure, temperature, fluid properties and pipe
diameter. Furthermore, correlations exist for limited geometrical
configurations (i.e. vertical or horizontal pipes) and simple physical
phenomena (no mass transfer between phases, constant temperature, etc.).
With the advent of more complex production systems involving deviated
wells as well as the move to exploit gas condensate resources the
production of which will inevitably involve strong mass transfer
effects, calculation methods will be required to account for such
complexities.
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ABSRACT - [ Total Page(s): 1 ]With the ever increasing need to optimize production, the accurate understanding of the mechanics of multi-phase flow and its effect on the pressure drop along the oil-well flow string is becoming more pertinent. The efficient design of gas-lift pump, electric submersible pumps, separators, flow strings and other production equipment depends on the accurate prediction of the pressure drop along the flow pipe. Pressure is the energy of the reservoir/well and it is crucial to understand how a chan ... Continue reading---
