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Keywords: roughness
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Proceedings Papers

Paper presented at the SPE/AAPG/SEG Unconventional Resources Technology Conference, June 13–15, 2023
Paper Number: URTEC-3870451-MS
... 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...
Proceedings Papers

Paper presented at the SPE/AAPG/SEG Unconventional Resources Technology Conference, July 26–28, 2021
Paper Number: URTEC-2021-5536-MS
... Abstract Natural rock fractures can be tensile, shear, or mixed-mode while coalesced faults are characterized by shear. The smooth manufactured fractures that are conventionally studied in laboratories do not capture the hydromechanical properties of the rough-surfaced fractures...
Proceedings Papers

Paper presented at the SPE/AAPG/SEG Unconventional Resources Technology Conference, July 20–22, 2020
Paper Number: URTEC-2020-3177-MS
.... 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...
Proceedings Papers

Paper presented at the SPE/AAPG/SEG Unconventional Resources Technology Conference, July 22–24, 2019
Paper Number: URTEC-2019-998-MS
... 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...
Proceedings Papers

Paper presented at the SPE/AAPG/SEG Unconventional Resources Technology Conference, July 22–24, 2019
Paper Number: URTEC-2019-520-MS
... 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...
Proceedings Papers

Paper presented at the SPE/AAPG/SEG Unconventional Resources Technology Conference, July 23–25, 2018
Paper Number: URTEC-2902986-MS
.... 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...
Proceedings Papers

Paper presented at the SPE/AAPG/SEG Unconventional Resources Technology Conference, July 23–25, 2018
Paper Number: URTEC-2903018-MS
... 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...
Proceedings Papers

Paper presented at the SPE/AAPG/SEG Unconventional Resources Technology Conference, July 24–26, 2017
Paper Number: URTEC-2697613-MS
... 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...
Proceedings Papers

Paper presented at the SPE/AAPG/SEG Unconventional Resources Technology Conference, July 24–26, 2017
Paper Number: URTEC-2687427-MS
... 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...
Proceedings Papers

Paper presented at the SPE/AAPG/SEG Unconventional Resources Technology Conference, August 1–3, 2016
Paper Number: URTEC-2448210-MS
... 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...
Proceedings Papers

Paper presented at the SPE/AAPG/SEG Unconventional Resources Technology Conference, August 25–27, 2014
Paper Number: URTEC-1934272-MS
... 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...

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