Spontaneous imbibition of water and determination of effective contact angles in the Eagle Ford Shale Formation using neutron imaging

摘要: Understanding of fundamental processes and prediction optimal parameters during the horizontal drilling hydraulic fracturing process results in economically effective improvement oil natural gas extraction. Although modern analytical computational models can capture fracture growth, there is a lack experimental data on spontaneous imbibition wettability reservoirs for validation further model development. In this work, we used neutron imaging to measure water into fractures Eagle Ford shale with known geometries orientations. An solution set nonlinear second-order differential equations was applied measured determine contact angles. The fit reasonably well determined angles that were slightly higher than static due effects in-situ changes velocity, surface roughness, heterogeneity mineral surfaces surface. Additionally, small widths may have retarded affected fits, which suggests average are not satisfactory modeling systems.