Dataset associated with Harris, C. et al. (2026), Unstable drainage dynamics during multiphase flow across capillary heterogeneities.

This dataset accompanies the publication Harris, C. et al. (2026), Unstable drainage dynamics during multiphase flow across capillary heterogeneities, Geophysical Research Letters. It includes X-ray micro-computed tomography (micro-CT), saturation, and pressure data collected during two core flood experiments designed to investigate multiphase flow in porous media with capillary heterogeneities. We also include processing scripts to reproduce the results and figures in the paper. Two repeat experiments (R1 and R2) were performed at high and low flow rates (HF and LF). Time-resolved X-ray CT images were collected at set timesteps (_t), and continuous pressure data were recorded and correlated with imaging times. Please refer to the main paper and supporting information for full details of the experimental methodology, data processing, and interpretation of results. Dataset Contents: X-ray CT Dataa) Raw synchrotron data (R1, R2, dry)b) Segmented (processed) CT datasets (R1, R2, dry) Image Processing Scripts - Avizo project files and segmentation workflows Pressure Data - Continuous pressure measurements synchronized with imaging intervals Figure Plotting Scripts - Code used to generate the figures presented in the publication README – A detailed overview of each folder, listing what it contains and how to use it.