In a pipeline simulation (transmission pipeline), from a gas compression plant to a gas processing plant, for the flow assurance simulation using OLGA, why is it that one I am reviewing (Flow Assurance report by other CONTRACTOR), the simulation targets the required pressure at the gas processing plant.
So their output indicates calculated required inlet pressure from the gas compression plant, when the gas compression plant has already been designed for a specific rated discharge pressure (from compressor) and even has control mitigations for too much high discharge pressure from the GCP, which will trip the specific compressor. One of the simulated case actually calculated a higher inlet pipeline pressure from the GCP (exceeding trip pressures). So the simulation is backcalculating the inlet pressure of the pipelines from the gas processing plant pressure requirement.
So, why is it not set going forward hydraulics (from a set pressure of different GCPs (rated discharge pressure to the maximum required flowrate in the gas processing plant)?
I haven't actually used OLGA.
I hope my question is clear.