Data for A novel method for evaluation of the spontaneous imbibition process in tight reservoir rocks: Mathematical model and experimental verification

S1 is NMR data for fully-saturated and centrifuged sample; S2 is the volume of imbibed water during imbibition experiment; S3 is NMR T2 distributions for imbibition saturated samples; S4 is the simulation result of imbibition model.