Multiphase Flow and Reactive Processes of CO₂ in Wellbore–Reservoir Systems During Drilling, Completion and Production

Dear Colleagues,

The increasing use of CO₂ in subsurface energy systems is reshaping the operating envelope of modern oil and gas wells. From CO₂-contaminated drilling and completion fluids to CO₂-EOR and storage projects, CO₂ now interacts with wellbore fluids, cements, tubulars, reservoir rocks and formation fluids across the full drilling–completion–production life cycle. These interactions involve tightly coupled multiphase flow and reactive processes that can alter phase behavior, rheology, wettability, relative permeability, mineral stability and mechanical integrity. A robust understanding of these CO₂-related processes is essential for safe well control, reliable wellbore integrity, efficient hydrocarbon displacement and secure long-term CO₂ containment, particularly under high-pressure, high-temperature and heterogeneous formation conditions.

This Special Issue on “Multiphase Flow and Reactive Processes of CO₂ in Wellbore–Reservoir Systems during Drilling, Completion and Production” is seeking high-quality experimental, modeling and field-based studies. Topics include, but are not limited to:

1. CO₂ influx, migration and control in drilling, completion and workover wellbores.
2. Interactions of CO₂ with drilling/completion fluids, spacers and wellbore clean-up fluids.
3. Effects of CO₂ on cement hydration, cement sheath integrity and sealing materials.
4. CO₂-driven multiphase flow, displacement and phase behavior of reservoir fluids.
5. Laboratory methods, numerical simulations and data-driven/AI approaches for CO₂-related wellbore–reservoir processes.

Prof. Dr. Peng Xu
Dr. Lei Pu
Dr. Jianjian Song
Dr. Wei Lv
Guest Editors

Dr. Lin Du
Guest Editor Assistant

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