Simulation reveals conditions for onshore arctic gas-condensate pipeline

Simulation of a long distance, large-diameter multiphase pipeline through onshore arctic conditions evaluated the effects of steady-state and transient conditions. The hypothetical pipeline contained a single intermediate compressor station.The study considered both base and rich-gas compositions, under such transient conditions as rate changes, pigging, and shut-in and restart and used the multiphase transient simulator OLGA2000.For high steady-state flow rates, substantial Joule-Thomson cooling was observed. In addition, for both rate-change and pigging simulations, either large slug-catcher surge volumes or high slug-catcher drain rates were required. Unless rate changes were carried o...

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