Liquid Inventory Management Issues in a Dual Large Diameter Long-Distance Subsea Wet Gas Pipeline System

摘要

Liquid inventory management is an important subject in asubsea wet gas pipeline system mainly due to long distance (~56 miles), large diameter (20+ inches), and three-phase fluid(gas, water/MEG, and condensate) effects. Using multiphasetransient simulation, this paper addresses some issues relatedto liquid inventory management as a result of transientoperations, such as restart and rampup (production increase).This study reveals that gas velocity and a knowledge of liquidholdup during steady state and transient operations at any timeand place are key parameters in developing a field operationstrategy. Managing pipeline liquid holdup at all times willensure that liquid surge arriving onshore will be within theslug catcher liquid handling capacity, while the transientoperations can be reasonably managed.