... Abstract Shales are impermeable rocks that need to be hydraulically fractured using an acidic hydraulic fracturing fluid (HFF) to enable commercial production. The fracturing process injects HFF at a high pressure to break the rock and create a series of high-flow fractures with rough surfaces...

...URTeC: 5536 Triaxial Direct-shear Reveals the True Magnitude of Shear Fracture Roughness Effects on Flow Meng Meng, Luke P. Frash, J. William Carey; Nathan J. Welch; Wenfeng Li; Samantha K. Peterson; Los Alamos National Laboratory Copyright 2021, Unconventional Resources Technology Conference...

.... Fracture conductivities were computed with a numerical model that simulates unpropped fracture closure. The results showed that the roughness of all the fracture samples increased after acid etching, but to different extents. The roughness was initially 1.58 ± 0.29 µm and developed into two groups...

... slippage phenomenon in the mix-wet porous media. The fractal theory is applied to characterize REV-scale heterogeneities including pore size distribution, pore-throat tortuosity, and pore surface roughness. We particularly modify the classical slippage factor by a fractal tortuosity to study liquid...

... as fracture propagation, filling material of natural fractures/joints and the permeability before and after stimulation (Su K et al. 2014). hydraulic fracturing shale gas flow in porous media Upstream Oil & Gas fracturing fluid displacement roughness mechanical closure effective stress...

.... In this work, we study the effect of the heterogeneity in composition and roughness in flow through hydraulically induced fractures. Since analytical solutions are restricted to simple domains, a 3D direct simulation approach was selected. To assess these effects, domains exhibiting geometrical mineral...

... of the delayed response is related to surface roughness. Introduction During hydraulic fracturing operations, where fluids and proppants are injected at depth to increase the permeability of a reservoir, focal mechanisms computed from recorded microseismic events show a significant number of shear slippage...

... to simulate the large Reynolds number fully-turbulent flow. An accurate equation of state and transport models of CO 2 are employed to account for CO 2 properties variations with pressure and temperature. The roughness of the pipe wall is also considered. Our model is validated by comparing the simulation...

... and varying in width. This work investigates the impact of fracture width heterogeneity, roughness, and leak-off on ceramic proppant transport and settling, using proppant distribution concepts of Equilibrium Dune Level (EDL) and Equivalent Dune Distance (EDX). Experimental work was conducted to investigate...

... in nanoscale. Finally, we used Gaussian filter method to get the roughness image of the surface sample and calculated the average roughness value. This paper shows that AFM has a substantial capacity in characterizing the pore structures of unconventional reserves in nanoscale. Introduction Due...

... a deviated well reduces the breakdown pressure significantly and activates a large number of veins with enhanced conductivity without the need for proppant injection. Upstream Oil & Gas complex reservoir orientation vertical sample hydraulic fracturing tensile fracture roughness vein...