Evaluation of Clay and Fumed Silica Nanoparticles on Adsorption of Surfactant Polymer during Enhanced Oil Recovery

Abstract

Static and dynamic adsorption have key role in chemical flooding process and they are important parameters in surfactant polymer degradation and decrease oil recovery. The effects of nano concentration on static adsorption of surfactant were investigated at variable condition polymer and surfactant concentration and nanoparticles are critical parameters influence the adsorption behavior at a flooding process. Surfactant polymer solutions and newly developed nanoparticles solutions were tested. The crude oil had a viscosity of 1320 mPa s at test conditions. In this paper, the role of nanoparticles in the adsorption of surfactant polymers onto solid surfaces of reservoir core is studied. The results which obtained by means of static adsorption tests, show that the adsorption is dominated by the clay and silica nanoparticles between the polymer molecules and the solid surface. Higher nanoparticles concentration leads to less adsorption, where the adsorption may decrease to 20 % of the adsorption level of surfactant polymer. The clay and Aerosil A300 nanoparticles in surfactant polymer solutions improved oil recovery by about the same amount. The clay, however, showed improved performance in comparison to Aerosil A300.

The effect of nanoparticles on reservoir wettability alteration: a critical review

“…Nanoparticles are defined in most references as the group of molecules bonded together to form particles with the smallest sizes ranging from 1 to 100 nm (Ehtesabi et al 2017;Mahmoud et al 2016;Torsater et al 2012). the displacement efficiency (Tarek 2015;Zaid et al 2014), improving the efficiency of polymers and surfactants (Cheraghian 2015(Cheraghian , 2017aSingh and Mahto 2017), and reduction of the polymer degradation caused by temperature and shear rate effects (Giraldo et al 2017).…”

Pore-scale experimental investigation of oil recovery enhancement in oil-wet carbonates using carbonaceous nanofluids

“…Despite their advantages, chemical flooding processes are limited by the high cost of additives and their potential losses through adsorption 22 – 24 . Low retention by the rock is also preferred to reduce pore plugging 25 , 26 . Traditional NPs, which consist mostly of metal oxide dispersions, may become colloidally unstable under reservoir conditions and cause formation damage 16 , 27 .…”

β‐Cyclodextrin‐functionalized copolymers based on multiple intermolecular forces for enhanced oil recovery

“…The flowing behaviors of polymer in porous media were investigated by determining two factors, resistance factor (R f ) and residual resistance factor (R ff ). R f and R ff were calculated by Equations (5) and (6). R f represented the mobility control ability and provided the effective viscosity of polymer during flowing in porous media, while R ff reflected the permeability reduction of porous media induced by polymer adsorption and retention, also it could be represented by the average thickness of adsorbed layer (e) surrounding sand grains as given in Equation (7) [34][35][36][37] :…”

“…[2,3] Nevertheless, with the development of complex reservoirs, commonly used polymers such as partially hydrolyzed polyacrylamide (HPAM) cannot meet the requirements well. [4][5][6] HPAM contains large proportion of CONH 2 , while hydrolysis reaction occurs for CONH 2 under a certain temperature (>70 C) and acidic-alkaline condition. Once the degree of hydrolysis is above 40%, HPAM molecular chains curl up and its thickening ability receded evidently.…”