X-ray CT data for WD and WZX during the process of spontaneous imbibition

Before spontaneous imbibition, X-ray μ-CT measurement at dry condition was firstly carried out to require the base information of CT intensity. Subsequently, imbibition liquid was injected into the acrylic plastic tube to fill up to the bottom surface of the coal plug (co-current imbibition). The imbibition fluid was removed after 15 minutes of spontaneous imbibition and prepare for CT scanning. Finally, repeating the above steps completes two samples under the same condition for 60 min, 120 min, 240 min, 600 min, 1440 min successively.Due to the large size of original 3-D reconstruction data (1920×1920×3620 for sampled WD and 1920×1920×4647 for sample WZX), the image was cropped into 600×600×2350 of sample WD and 600×600×3400 of sample WZX for subsequent analysis.