Can an offshore slug catcher survive multi-tonne liquid slugs surging uphill during a cold restart?

What happens when an unplanned compressor trip traps high-pressure, CO2-rich gas inside 150km of subsea pipeline in the deep Arafura Sea? Can an offshore slug catcher survive multi-tonne liquid slugs surging uphill during a cold restart? Worley completed FEEDs for two offshore packages on the $21B Abadi LNG and CCS megaproject in Indonesia’s Masela Block. Operated by Inpex with Pertamina and Petronas, this project features a 9.5 MTPA FPSO tied to 150km of SURF, dual export lines, and dedicated deepwater CO2 re-injection pipelines. Drafting subsea layouts in Jakarta, Singapore, and Perth is world-class work. But in 30 years of offshore commissioning, co-locating mega-scale LNG with deepwater CCS is an extreme flow assurance tightrope. 🚀 *The Abadi Blueprint:* 🌊 *Masela Block, Arafura Sea:* $21B integrated gas and carbon hub. 🌐 *150km SURF Network:* Dual gas export lines plus dedicated CCS links. ⚡ *9.5 MTPA FPSO:* Massive floating production with reservoir CO2 re-injection. 🚢 *Regional Engineering:* Executed by Worley’s Subsea Centers of Excellence. ⚠️ *The Multiphase & Hydrate Pitfall:* Raw Abadi reservoir gas carries high CO2 under high pressure, creating severe operational risks: 🧊 *Thermal Cooldown & Hydrates:* Unplanned trips cause rapid heat loss to cold seabed water, plunging gas into the solid hydrate envelope. 💥 *Multi-Tonne Slugs:* Condensation drops out across 150km of seabed. Restarting risks launching massive liquid slugs that overwhelm topside slug catchers. 🛡️ *Dynamic HIPPS & Choke Control:* Preventing trips requires High-Integrity Pressure Protection Systems (HIPPS), predictive anti-slug chokes, and closed-loop MEG dosing. 🔍 *The Reality Check:* Engineering centers draft the layout, but synchronized flow assurance automation keeps mega-floaters online. You cannot commoditize deepwater multiphase kinetics. 💬 *Let’s Debate:* To Flow Assurance Leads, Subsea Engineers, and Commissioning Managers: 🔹 When restarting a 150km high-CO2 line, do you rely on predictive slug suppression or subsea choke throttling? 🔹 How do you verify dynamic HIPPS response times over long subsea umbilical distances? Drop your perspectives below. 👇 📌 Download Pre-Commissioning & P&ID Guidelines: [https://sumbit-infographics.netlify.app/](https://sumbit-infographics.netlify.a...) 🔔 SUBSCRIBE for complete engineering masterclasses: [   / @offshoreengineeringacademy  ](   / @offshoreengineeringacademy  ) 🌐 Visit SgMarineHub: [https://sgmarinehub.com/](https://sgmarinehub.com/?utm_source=g...) #OffshoreEngineering #AbadiLNG #Inpex #Worley #MaselaBlock #CarbonCapture #CCS #SubseaEngineering #FlowAssurance #FPSO #ProcessSafety #Commissioning