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Inhibition of asphaltene deposition by Al_(2)O_(3) nanoparticles during CO_(2) injection

Petroleum Research 2023年第4期8卷 499-504页

作者： ali amraeiniya alireza Rahimi Nadia Nikpour Siamand Salimi Baneh Farid Arabzadeh Mehdi Razavifar Department of Petroleum Engineering Islamic Azad UniversityCentral Tehran BranchTehranIran Department of Petroleum Engineering Islamic Azad UniversityLamerd BranchLamerdIran Department of Mechanical Engineering Urmia UniversityUrmiaIran Department of Petroleum and Natural Gas Engineering Sahand University of TechnologyTabrizIran Department of Petroleum Engineering Kharg BranchIslamic Azad UniversityKhargIran Department of Petroleum Enginering School of Chmical and Peoeum EngineeringShraz UnivertyShaz Iran

Carbon dioxide flooding is of interest due to its high oil-sweep efficiency for enhanced oil recovery and contribution to the reduction of greenhouse gas ***,when CO_(2)is injected into deep geological strata,asphaltene may *** this work,the effect of Al2O3 nanoparticles on the deposition of asphaltene was examined by assessing the variations of bond number and interfacial tension at different pressures and a temperature of 6℃.The asphaltene onset point and intensity were characterized using the bond number,which proved a better indicator of changes in oil droplet shape and interfacial tension with *** mixtures of toluene and n-heptane that contained two different kinds of asphaltenes were used as M and D oil samples.A 0.06 mass%addition of Al_(2)O_(3) nanoparticles,which worked best for reduction of interfacial tension,was also applied at various *** of nanoparticles to the oils prevented asphaltene precipitation in both synthetic samples by altering the slope of the plot of interfacial tension with pressure by 49.7% for the M sample and 9.0%for the D *** Al_(2)O_(3)nanoparticles were found to be more effective at inhibiting asphaltene precipitation for the M oil sample due to its lower H/C ratio and higher nitrogen content.

关键词： CO_(2)injection Enhanced oil recovery Asphaltenedeposition Aluminum oxidenanoparticles Interfacial tension Bond number

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Experimental study on nanoparticles-assisted low-salinity water for enhanced oil recovery in asphaltenic oil reservoirs

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Petroleum 2023年第3期9卷 395-402页

作者： ali amraeiniya Soroush Shojaei Amir ali Mohseni Behzad Haj Abbasi Mahani Sogand Saatchi Arash Barahooie Bahari Seyyed Mohammad Mousavi Sisakht Department of Petroleum Engineering Faculty of EngineeringIslamic Azad UniversityTehranIran Department of Petroleum Engineering Semnan UniversitySemnanIran Department of Chemistry and Chemical Engineering Rasht BranchIslamic Azad UniversityRashtIran Department of Petroleum Engineering Lamerd Higher Education CenterLamerdIran

The purpose of this research is to look into the augmentation of silica nanoparticles(NPs)with low salinity(LowSal)brine for EOR.A series of analyses,including oil/water interfacial tension(IFT)and rock wettability tests were undertaken to determine an optimal dispersion to flood into a porous carbonate core with a defined pore size *** 60℃and 14.5 psi,the maximum drop(i.e.,roughly 12.5 mN/m)in oil/water IFT by 0.3 wt%brine occurred,but when 0.08 wt%silica was added to the brine,the IFT reduced to 14.51 mN/m at 60℃and 14.5 *** wettability analysis revealed a significant reduction in contact angle,from 142°to 72°and 59°,using 0.04 and 0.08 wt%silica in LowSal brine,but the extent reduced by brine alone was *** results of rock pore size characterization were discussed in terms of the accomplishment of operating EOR in the porous medium in the presence of *** addition of 0.08 wt%silica to the injected brine resulted in an additional oil recovery of 16.3%OOIP as well as a significant shift in the endpoints/cross-points of the oil/water relative permeability *** findings of this research might help improve oil recovery from asphaltenic oil reservoirs or,more environmentally friendly,remediate petroleum crude-oil polluted soil.

关键词： Silica nanoparticles Low salinity brine Enhanced oil recovery Carbonate Relative permeability

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