Shale instability during shale drilling poses significant challenges that require effective additives to control swelling and enhance water-based drilling fluids.This study investigates the effectiveness of various sh...Shale instability during shale drilling poses significant challenges that require effective additives to control swelling and enhance water-based drilling fluids.This study investigates the effectiveness of various shale in-hibitors,both individually and in combination,and compares them to the latest innovation i.e,Natural Deep Eutectic Solvents(NADES)as a promising alternative.Various additives including Potassium Chloride(KCl),1-Ethyl-3-methylimidazolium chloride.([EMIM]Cl),SiO2 nanoparticles,amine terminated polyetheramine(ATPE),Okra mucilage,Choline Chloride:Urea Deep Eutectic Solvent(DES),and Citric acid:Glycerine Natural Deep Eutectic Solvent(CA NADES)and their combinations were subjected to rigorous examination to delineate their impact on shale stability and drilling fluid properties.Notably,CA NADES reduced mudcake thickness by 42.8%,filtrate volume by 40.3%,and linear swelling by 76.1%,while improving shale recovery by 51.7%.Among the additive combinations,SET B(0.5%KCl+0.5%ATPE)and SET G(0.5%KCl+0.5%[EMIM]Cl)demonstrated particularly effective performance.Surface tension measurements revealed favorable interfacial properties,X-ray diffraction analysis confirmed effective intercalation,and zeta potential assessments indicated improved colloidal stability.Overall,these findings highlight the critical role of optimized additive formulations in miti-gating shale instability and enhancing drilling fluid performance,offering promising strategies for more efficient and reliable drilling operation.展开更多
基金YUTP Grant 015LC0-535 for providing financial assistance for this study.
文摘Shale instability during shale drilling poses significant challenges that require effective additives to control swelling and enhance water-based drilling fluids.This study investigates the effectiveness of various shale in-hibitors,both individually and in combination,and compares them to the latest innovation i.e,Natural Deep Eutectic Solvents(NADES)as a promising alternative.Various additives including Potassium Chloride(KCl),1-Ethyl-3-methylimidazolium chloride.([EMIM]Cl),SiO2 nanoparticles,amine terminated polyetheramine(ATPE),Okra mucilage,Choline Chloride:Urea Deep Eutectic Solvent(DES),and Citric acid:Glycerine Natural Deep Eutectic Solvent(CA NADES)and their combinations were subjected to rigorous examination to delineate their impact on shale stability and drilling fluid properties.Notably,CA NADES reduced mudcake thickness by 42.8%,filtrate volume by 40.3%,and linear swelling by 76.1%,while improving shale recovery by 51.7%.Among the additive combinations,SET B(0.5%KCl+0.5%ATPE)and SET G(0.5%KCl+0.5%[EMIM]Cl)demonstrated particularly effective performance.Surface tension measurements revealed favorable interfacial properties,X-ray diffraction analysis confirmed effective intercalation,and zeta potential assessments indicated improved colloidal stability.Overall,these findings highlight the critical role of optimized additive formulations in miti-gating shale instability and enhancing drilling fluid performance,offering promising strategies for more efficient and reliable drilling operation.
