Impact of Slickwater Fracturing Fluid on Pore Structure and Micromechanical Properties of Clay-Rich Shale Using Fluid Intrusion and AFM Experiments DOI Creative Commons
Qichi Dai, Wenjibin Sun, Yujun Zuo

et al.

ACS Omega, Journal Year: 2025, Volume and Issue: 10(6), P. 6164 - 6181

Published: Feb. 4, 2025

Multistage hydraulic fracturing leads to prolonged interactions between shale reservoirs and slickwater fluids, resulting in changes the pore structure micromechanical properties of shale. However, systematic studies impact mineral composition on remain limited. This research investigates effects fluids with different compositions, focusing Wufeng-Longmaxi northern Guizhou, China. Comprehensive analyses were conducted core samples before after immersion fluid, utilizing various testing methods, including field emission scanning electron microscopy, adsorption experiments, mercury intrusion porosimetry, atomic force microscopy characterize structure, surface morphology, modulus values Additionally, sulfur-carbon analysis, vitrinite reflectance testing, X-ray diffraction employed assess geochemical parameters The results indicate that reacting clay minerals exhibit swelling dispersion, carbonate undergo dissolution, while quartz remains largely unchanged. Furthermore, better retention volume specific area shale, more rapidly decrease. Clay-rich shales retain pores compared quartz-rich organic-rich shales, facilitating gas migration. clay-rich significantly decrease those which may undermine effectiveness proppants, fracture closure reduced permeability. Therefore, maintaining is crucial for sustainable extraction gas. addition stabilizers fluid help preserve porosity reservoir postfracturing.

Language: Английский

Impact of Slickwater Fracturing Fluid on Pore Structure and Micromechanical Properties of Clay-Rich Shale Using Fluid Intrusion and AFM Experiments DOI Creative Commons
Qichi Dai, Wenjibin Sun, Yujun Zuo

et al.

ACS Omega, Journal Year: 2025, Volume and Issue: 10(6), P. 6164 - 6181

Published: Feb. 4, 2025

Multistage hydraulic fracturing leads to prolonged interactions between shale reservoirs and slickwater fluids, resulting in changes the pore structure micromechanical properties of shale. However, systematic studies impact mineral composition on remain limited. This research investigates effects fluids with different compositions, focusing Wufeng-Longmaxi northern Guizhou, China. Comprehensive analyses were conducted core samples before after immersion fluid, utilizing various testing methods, including field emission scanning electron microscopy, adsorption experiments, mercury intrusion porosimetry, atomic force microscopy characterize structure, surface morphology, modulus values Additionally, sulfur-carbon analysis, vitrinite reflectance testing, X-ray diffraction employed assess geochemical parameters The results indicate that reacting clay minerals exhibit swelling dispersion, carbonate undergo dissolution, while quartz remains largely unchanged. Furthermore, better retention volume specific area shale, more rapidly decrease. Clay-rich shales retain pores compared quartz-rich organic-rich shales, facilitating gas migration. clay-rich significantly decrease those which may undermine effectiveness proppants, fracture closure reduced permeability. Therefore, maintaining is crucial for sustainable extraction gas. addition stabilizers fluid help preserve porosity reservoir postfracturing.

Language: Английский

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