7 research outputs found
Prediction of asphaltenes destabilization onset by ASIST: a comparison with experimental data obtained by acoustic resonator method
AFFInternational audienc
Prediction of Asphaltene Deposition Conditions: A Revisit of ASIST Methodology by Using Fully Immersed Quartz Crystal Sensor
COMInternational audienc
Effect of the water-soluble indigenous crude oil surfactants on the w/o interfacial properties and emulsion stability
AFFInternational audienc
Competitive adsorption of PAM and HPAM on siliceous material
International audienc
Impact of polyacrylamide adsorption on flow through porous siliceous materials: State of the art, discussion and industrial concern
International audienceHypothesis: Adsorption of high molecular mass polymers impacts flow in porous media. In the industrially crucial case of acrylamide-based polymers in porous silicates, the very occurrence of adsorption is still debated. Thus, the present work aimed at establishing a clear correlation between adsorption of acrylamide-based polymers and injectivity loss in porous silica. Experiments: A review of the literature revealed apparent discrepancies regarding the affinity of acrylamide-based polymers for siliceous materials having ostensibly the same chemical composition. Through a deeper analysis of the reported literature and new experimental measurements on well-defined polymers and surfaces, we investigated the relation between the silica surface properties and the acrylamide-based polymer adsorption. Our observations were confronted with water injection experiments in porous media of different surface compositions previously put in contact with polymers. Findings: The polymer affinity towards the silica surface depended on the density of hydroxyl groups at the surface of the oxide, its thermal treatment, storage condition and purity. This demonstrated that the impact of adsorption on acrylamide-based polymer flow within porous silicates heavily depends on the silicate surface composition and must be carefully evaluated. In view of the continually expanding use of acrylamide-based polymers, notably in enhanced oil recovery, such considerations provide interesting insights into the effect of adsorption on their flow into porous materials
Characterization of crude oil interfacial material isolated by the wet silica method
COMInternational audienc