A pore-scale study on the dynamics of spontaneous imbibition for heterogeneous sandstone gas reservoirs

The underlying mechanism for spontaneous imbibition in a water–gas system plays significant role hydraulic fracturing sandstone gas reservoirs. objective of this study is to characterize the heterogeneity low-permeability sandstones and investigate their effect on from perspective pore scale. We selected different cores with various structures evaluate impact dynamics imbibition. heterogeneities are contributed clay mineral distribution characterized through CT scans. results show that minerals have higher numbers than core matrix micropores predominantly distributed particles rather matrix. Additionally, water rate larger macropores, when porosities similar, increased decreasing permeability. Moreover, 1D frequency scans at locations governed by particles. These findings can help us further understand fluids heterogeneous