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Jitendra Sangwai
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Jitendra Sangwai
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Jitendra Sangwai
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Sangwai, Jitendra S.
Sangwai, Jitendra
Sangwai, J. S.
Sangwai, Jitendra Shital
Sangwai, J.
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4 results
Now showing 1 - 4 of 4
- PublicationInvestigation of water and polymer flooding for enhanced oil recovery method in differential lobe pore structure(01-01-2023)
;Chowdhury, Satyajit ;Rakesh, MayankThe total recovery of crude oil can be significantly improved by injecting fluids during the secondary and tertiary stages of production. The process leading to improved vertical and areal sweep efficiency is highly influenced by viscous and capillary forces. Along with reservoir rock properties, the reservoir fluid and displacing fluid properties play a critical role during enhanced oil recovery processes. In this study, a two-dimensional differential two-lobe pore throat structure was modelled to investigate the phenomena of water and polymer flooding. Computational fluid dynamics (CFD) with transient analysis was incorporated to study the oil recovery efficiency with changing effect of wettability conditions, and oil and injecting fluid properties. The fractional flow of water at the outlet, breakthrough time, and residual oil saturation were considered as the evaluation factor for numerical experiments. Navier–Stokes equation coupled with the volume of fluid (VoF) model is used to describe the flooding process and for interface tracking. Inconsistent water cut at the outlet was observed in cases with high viscosity contrast. A significant difference in residual oil saturation (10–25%) was observed between water-wet and oil-wet conditions. Polymer flooding improved the total recovery by 7–22% as compared to simple water flooding. - PublicationA review of the supercritical CO2 fluid applications for improved oil and gas production and associated carbon storage(01-06-2023)
;Prasad, Siddhant Kumar; Byun, Hun SooSupercritical fluids find use in various areas in oil and gas production operations due to their unique properties. Supercritical CO2 (sc-CO2) with its reduced viscosity, increased diffusivity, and liquid like density, is attractive for enhanced hydrocarbon recovery, shale gas fracturing and drilling (especially in underbalanced condition). Apart from enhanced hydrocarbon recovery CO2 injection is also desirable due to associated CO2 storage through various trapping mechanisms. CO2-EOR/EGR and storage processes are affected by coupled geochemical, petrophysical and geomechanical alterations due interaction of sc-CO2 with reservoir rock/fluids Along with diffusion/dispersion of sc-CO2 in the fluid filled pore spaces. CO2-monitoring combined with lifecycle analysis can help to ensure safety and optimize the CO2-EOR/storage project, considering the environment. However, many technical, financial and policy challenges need to be overcome to realize the success of the CO2-EOR/storage project and achieve carbon neutrality. This review paper discusses such challenges, the current mitigation practice, gaps and future direction of research. This holistic review would help gain insights into the sc-CO2-EOR/storage mechanisms, selection criteria, various limitations, mitigation and optimizations while applying the method for unconventional reservoirs with heterogeneity and varying fluid properties. - PublicationEvaluation of ionanofluid for chemical-enhanced oil recovery for matured crude oil reservoirs(01-01-2022)
;Sharma, Ankit ;Kakati, Abhijit ;Sakthivel, Sivabalan ;Jadhawar, PrashantThe purpose of the present work is to evaluate applicability of ionanofluids for enhanced oil recovery (EOR) applications. Two different ionanofluids have been prepared for this study by adding silica nanoparticles into two different ionic liquids (tripropyl ammonium sulphate and triethyl ammonium sulphate) solutions. The effects of nanoparticle and ionic liquid on the interfacial tension of crude oil-nanofluid and their enhanced oil recovery performances have been evaluated. Ionanofluids are found to have the ability to reduce the interfacial tension to a significantly low value. The results of this study also indicate that ionanofluids has much higher enhanced oil recovery efficiencies in comparison to nanofluid and ionic liquid alone. Therefore, ionanofluids have the potential to be used as an excellent future EOR agent. - PublicationPore scale investigation of low salinity surfactant nanofluid injection into oil saturated sandstone via X-ray micro-tomography(07-03-2020)
;Jha, Nilesh Kumar ;Lebedev, Maxim ;Iglauer, Stefan ;Ali, Muhammad ;Roshan, Hamid ;Barifcani, Ahmed; Sarmadivaleh, MohammadHypothesis: Low salinity surfactant nanofluids have recently shown promising characteristics in wettability alteration of the silicate-based rock representative substrate and interfacial tension reduction of oil/aqueous phase interface. Pore level understanding of the physical processes entailed in this new class of low salinity injection fluids in oil-phase saturated real rock porous media is required, which has not been conceived yet. Experiments: Thus, we investigate the oil recovery performance and possible mechanisms of oil recovery by the injection of low salinity surfactant (SDBS, 1.435 mM) aqueous solutions (with 0%, 0.01% and 0.1% (by weight) ZrO2 nanoparticles) into the oil phase saturated Doddington sandstone miniature core plugs. The designed experiment involves core flooding with X-ray transparent core-holder developed in-house and analysis/processing of the acquired image data. Findings: The injection of low salinity surfactant nanofluids with 0.01% ZrO2 nanoparticles leads to maximum oil phase recovery. The results suggest that the dominating mechanisms for oil recovery are wettability alteration, inherent interfacial tension reduction, and the effect of significant amount of microemulsions formation is rather trivial. Low salinity effect, even in combination with surfactant, caused fines migrations (not reported earlier), is found to be significantly mitigated using nanoparticles. This new class of fluids may significantly enhance oil recovery.