This paper studies the impact of impurities in CO2 rich fluids using an Integrated Asset Model (IAM) which comprises a specialised thermodynamic model coupled with a sophisticated thermo-hydraulic model using Wood proprietary software Virtuoso. Sensitivity studies of depressurisation with various CO2 rich fluid compositions was carried out using the IAM offline simulator to identify the impact of the impurities on system performance. The simulation results presented in this paper will provide valuable inputs for risk analyses and mitigation and demonstrate how the IAM developed helps operation optimisation during depressurisation. This paper highlighted that the main risks encountered during CO2 pipeline depressurisation include low temperature and corrosion risks, challenges associated with multiphase flow, and potential risk of solids formation.

Keywords:
remediation of hydrates, pvt measurement, riser corrosion, asphaltene inhibition, asphaltene remediation, completion installation and operations, wax inhibition, scale remediation, subsurface storage, oilfield chemistry
Subjects:
Well & Reservoir Surveillance and Monitoring, Production Chemistry, Metallurgy and Biology, Pipelines, Flowlines and Risers, Flow Assurance, Fluid Characterization, Formation Evaluation & Management, Storage Reservoir Engineering, Environment, Production logging, Inhibition and remediation of hydrates, scale, paraffin / wax and asphaltene
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