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您的检索式：作者名="Sugirtha Velusamy"
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| 1 | Imidazolium-Based Ionic Liquids as an Anticorrosive Agent for Completion Fluid Design显示文摘Most of the onshore and offshore oil and gas reservoirs are facing operational challenges due to high temperature and high salinity, thus requiring advanced techniques for realizing the expected oil recovery with the use of specially designed chemicals. During oil and gas well development, completion fluids, which are solids-free liquids, are used to complete an oil or gas well. Completion fluids consisting of brines are primarily used for oil and gas well stabilization and are corrosive in nature. There is a need to develop additives to be added with completion fluids to address the corrosive nature. The present investigation involved the usage of two imidazolium ionic liquids(ILs) as corrosion inhibitors for mild steel in various completion brine(Ca Cl_2, HCOOCs and ZnBr_2) fluids. The study was performed using various techniques, such as, potentiodynamic polarization, weight loss measurements and exposure studies. All the above techniques showed promising results which indicated that the ILs as corrosion inhibitors used were of the mixed-type following both physisorption and chemisorption over the mild steel surface. Among the two inhibitors studied here, 1-octyl-3-methyl imidazolium chloride([OMIM]^+[Cl]^-) with longer alkyl chain exhibited better inhibition efficiency and much lesser corrosion rate than 1-butyl-3-methyl imidazolium chloride([BMIM]^+[Cl]^-) with a shorter alkyl chain. The results obtained from various methodologies indicate that ionic liquids can be explored to develop anti-corrosive completion fluids suitable for oil and gas reservoirs. | Sugirtha Velusamy Sivabalan Sakthivel Lakshman Neelakantan Jitendra S.Sangwai | 2017 | Journal of Earth Science2017，28，5： | 2 |
| 2 | Effect of ammonium based ionic liquids on the rheological behavior of the heavy crude oil for high pressure and high temperature conditions显示文摘Heavy crude oil(HCO)production,processing,and transportation forms several practical challenges to the oil and gas industry,due to its higher viscosity.Understanding the shear rheology of this HCO is highly important to tackle production and flow assurance.The environmental and economic viability of the conventional methods(thermal or dilution with organic solvents),force the industry to find an alternative.The present study was constructed to investigate the effect of eco-friendly ionic liquids(ILs)on the HCO's rheology,at high temperature and high pressure.Eight different alkyl ammonium ILs were screened for HCO's shear rheology at the temperatures of 25-100℃ and for pressures 0.1e10 MPa.The addition of ILs reduced the HCO's viscosity substantially from 25 to 33%from their original HCO viscosity.Also,it aids to reduce the yield stress to about 15-20%at all the studied experimental conditions.Furthermore,the viscoelastic property of the HCO was studied for both strain-sweep and frequencysweep and noticed the ILs helps to increase HCO's loss modulus(G00)by reducing storage modulus(G0),it leads to the reduction of the crossover point around 25-32%than the standard HCO.Mean the ILs addition with HCO converts its solid-like nature into liquid-like material.Besides,the effect ILs chain length was also studied and found the ILs which has lengthier chain length shows better efficiency on the flow-ability.Finally,the microscopic investigation of the HCO sample was analyzed with and without ILs and witnessed that these ILs help to fragment the flocculated HCO into smaller fractions.These findings indicate that the ILs could be considered as the better alternative for efficient oil production,processing,and transportation. | Sivabalan Sakthivel Sugirtha Velusamy | 2022 | Petroleum2022，8，4： | 0 |
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