Investigation of the simultaneous chemicals influences to promote oil-in-water emulsions stability during enhanced oil recovery applications

Effect of Water/Decane Ratios and Salt on the Stability, Rheology, and Interfacial Tension of Water/Decane Emulsions

“…The outcomes of their work provided a good path to understand the correlation between morphologies and physical properties of emulsion; however, further investigations are necessary. Likewise, several attempts have been made toward the application of emulsions to generate additional crude oil during enhanced oil recovery − operations. To a certain degree, quite a number of researchers have worked on water/decane-related emulsions with divergent experimental outcomes and hypothesis, − and more importantly, one of the key limitations facing water/decane system is its emulsion formation instability which ultimately diminishes its practical application in various areas of human endeavors.…”

Synergistic System of Alkyl Polyglucoside and Amine Oxide for Enhanced Oil Recovery

“…Multitudinous laboratory investigations and field applications have proved that the emulsification enabled by a surfactant is an important mechanism to enhance oil recovery. ,− On the one hand, an emulsion can improve microscopic displacement efficiency by stripping oil. − On the other hand, due to emulsification with entrapment and the Jamin effect, the emulsion droplets can block the pore throat of the formation, leading to the permeability reduction and regulating the water injection profile. , Consequently, an emulsion can be used as a mobility control agent, reducing the water production and enhancing macroscopic oil sweep efficiency. − Feng et al established a kind of fine emulsion (FE) and found that the oil recovery efficiency can reach 16.8% after water flooding by FE system emulsification. They have discovered the emulsification mechanisms including emulsification with entrainment and the performance control of the emulsion through a microscopic oil displacement experiment.…”

Injection of emulsions into cores packed with Ottawa sand and Berea sandstone as a method for enhanced oil recovery

“…The microscopic displacement within the pores of natural geological formations has yielded recovery percentages from 20 to 50 % of original oil-in-place (OOIP) at the first and secondary recovery stages (Baldygin et al, 2014;Kamal et al, 2017;Karambeigi et al, 2015;Park et al, 2015;Shafiee Najafi et al, 2017). As for the tertiary oil recovery, also known as enhanced oil recovery (EOR), different methods involving thermal and biological processes, and the injection of gases and/or chemical substances are employed to produce a change in the mobility of stagnant oil trapped in a porous medium, mainly of mature reservoirs (Ahmadi et al, 2019;de Farias et al, 2016;Nazar et al, 2011;Shang & Hou, 2019;Suarez-Suarez et al, 2019;Vahdanikia et al, 2020;Zhao & Pu, 2020) and it has been reported that by means of this stage, between 20 and 40 % of additional OOIP recovery has been achieved (Li et al, 2020).…”

“…Liu et al, 2019;Nazar et al, 2011;F. Yu et al, 2019;Zhou et al, 2020), which can be stabilized by the presence of asphaltenes, waxes, resins and naphthenic acids (Ahmadi et al, 2019;Ismail et al, 2020;Lee & Babadagli, 2020;Pang et al, 2019). When the emulsifier concentration is 0.4 or 0.5 %, pore-throat-scale emulsions with viscosity between 40-70 mPa•s can be formed and with the increase of emulsifier concentration, the storage modulus of emulsion increases related to the loss modulus, enhancing the viscoelasticity of formed emulsions compared to emulsions formed with 0.3 % or less surfactant (Zhou et al, 2017).…”