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 out very slowly, increases in flow rate were found to produce more-demanding conditions for the slug catchers than pigging, if separator drain rates were limited. With the more-abrupt arrival of pigging slugs, however, increasing the separator's drain rate was much less effective in reducing pigging surge-volume requirements than for the corresponding requirements of rate changes. Shut-in and restart operations generated substantially smaller surge-volume requirements than either pigging or rate changes.
Simulation reveals conditions for onshore arctic gas-condensate pipeline
Die Simulation von Strömungen in Gaskondensatpipelines unter arktischen Festlandbedingungen
Oil and Gas Journal ; 101 , 44 ; 68-73
2003
6 Seiten, 8 Bilder, 2 Tabellen, 2 Quellen
Article (Journal)
English
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