Geofluids / 2019 / Article / Tab 5

Research Article

Experimental Study of Fracturing Fluid Retention in Rough Fractures

Table 5

FFR mechanisms.

Retention mechanismControlling factorFavorable condition

Surface capillary retentionWettability, surface roughnessLarge roughness, hydrophilic rock, low flow rate
Surface-bound water filmSurface dryness, liquid surface propertiesDry surface, strong hydrophilicity
Matrix pore imbibitionPhysical properties, liquid type, clay and ion contentSmall pores, wetting liquids, high clay/ion content
Fracture closure “locking”Contact area, fracture aperture, roughness, stressLarge contact area/stress, high roughness, small aperture
Gravity retentionLiquid viscosity, fracture aperture, roughness, fracture heightHigh viscous force, large aperture
Viscous trappingFracture aperture, drive pressure, liquid viscositySmall aperture and pressure, high viscosity

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