Hydrophobic effect further improves the rheological behaviors and oil recovery of polyacrylamide/nanosilica hybrids at high salinity

Xu, Long; Liu, Sen; Qiu, Zhe; Gong, Hongyu; Fan, Haiming; Zhu, Teng; Zhang, Huan; Dong, Mingzhe

doi:10.1016/j.ces.2020.116369

Cited by 21 publications

(12 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Stokes–Einstein equation is usually employed to describe the diffusion behavior of particles in media, that is, dilute solutions with low viscosity. , Whereas the CCNF/NP systems in this study present remarkable viscoelasticity, which might be ascribed to their complex interactions. The interaction between NPs and polymers usually includes electrostatic binding, hydrogen bonding, hydrophobic interaction, and ion binding, which can significantly affect the rheological properties of polymer solutions. − In the present study, all the NPs and CCNF are hydrophilic and are rich in hydroxyl, which means the hydrophobic interaction and hydrogen bonding could be neglected in the different interactions between the CCNF and various NPs. Therefore, it was believed that the electrical properties and size of NPs and CCNF might be the critical factors that control their interaction and the corresponding rheological properties.…”

Section: Resultsmentioning

confidence: 86%

“…For polymer flooding, the stability of the fluid viscosity is seriously affected by the formation temperature and salinity. ,, Figure presents the viscosity variation of various CCNF/NP mixtures at different temperatures. In all systems, the sample viscosity gradually decreases with increased temperature, which could be attributed to the accelerated thermal motion of NPs and CCNF and H 2 O molecules that causes the partial destruction of the constructed network . It is worth noting that the increase in temperature hardly causes the fatal reduction to the viscosity of the CCNF/NP mixtures, and all the samples maintain a relatively high viscosity at even 70 °C.…”

Section: Resultsmentioning

confidence: 89%

“…h i b i t e d . motion of NPs and CCNF and H 2 O molecules that causes the partial destruction of the constructed network 52. It is worth noting that the increase in temperature hardly causes the fatal reduction to the viscosity of the CCNF/NP mixtures, and all the samples maintain a relatively high viscosity at even 70 °C.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Effects of Various Nanoparticles on the Rheological Properties of Carboxylic Cellulose Nanofibers and the Compound System’s Application in Enhanced Oil Recovery

et al. 2021

View full text Add to dashboard Cite

The addition of nanoparticles (NPs) to polymer solutions can effectively improve the rheological and thermal properties of the polymer solution. However, the interaction between NPs and cellulose, a potential alternative for polymers applied in enhanced oil recovery (EOR), has been scarcely reported. In this work, the effects of three typical NPs (AlOOH, SiO 2 , and ZnO NPs) on the rheological properties, emulsifying ability, and resistance to harsh conditions of carboxylic cellulose nanofiber (CCNF) solutions were investigated thoroughly. The results indicate that only AlOOH NPs exert a positive impact on the CCNF's rheological properties, which should be ascribed to the delicate electrostatic attraction between the CCNF and AlOOH NPs. The intensified network of the CCNF/AlOOH system also results in a superior emulsifying performance and temperature and salt tolerance than other mixed CCNF/NPs systems. In the core flooding test, the CCNF/AlOOH system outperforms the individual CCNF system and the conventional partially hydrolyzed polyacrylamide, reflecting the potential of incorporating AlOOH NPs in the CCNF to promote the CCNF's practical application in EOR.

show abstract

Section: Resultsmentioning

confidence: 86%

Section: Resultsmentioning

confidence: 89%

See 1 more Smart Citation

Effects of Various Nanoparticles on the Rheological Properties of Carboxylic Cellulose Nanofibers and the Compound System’s Application in Enhanced Oil Recovery

et al. 2021

View full text Add to dashboard Cite

show abstract

“…HPAM is a linear water‐soluble polymeric compound with high molecular weight. HPAM linear chains form complex spatial network structure by the mechanical entanglement and the hydrogen bonding interaction of the amide and carboxylate 36,37 . This spatial network structure has little influence on the oil–water interfacial tension (Figure 2B).…”

Section: Methodsmentioning

confidence: 99%

Deformation and breakup of water droplets containing polymer under a DC electric field

et al. 2022

View full text Add to dashboard Cite

The deformation and breakup behaviors of droplets containing polymer are investigated by high‐speed photography to reveal the mechanism of electric field collapse when treating the emulsion containing polymer. The results show the electric field collapse process caused by droplet breakup consists of three steps. First, the droplet containing polymer ejects liquid filament under strong electric field. Second, the liquid filament is continuously stretched until it touches positive and negative electrodes. Finally, the severe Joule heating effect appears because the strong electric current flows through the liquid filament. The release of a large amount of heat causes the formation, expansion, and collapse of bubble, resulting in the fracture of liquid filament and the collapse of electric field. The increase of polymer concentration strengthens the Joule heating effect and enlarges the influence scope of bubble expansion and collapse. These findings provide significant guidance for the stable operation of electric dehydrator.

show abstract

“…In EOR, the polymers are added to the displacement water to increase its flow resistance, resulting in a favorable mobility ratio [ 21 ]. HAP is currently attracting increasing attention from polymer EOR researchers because of its ability to produce a higher flow resistance than HPAM at lower concentrations, better salinity and temperature resistance [ 22 ]. HAP contains a number of more or less randomly distributed hydrophobic groups.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Phenol-Formaldehyde Resin Aggregates as In-Depth Conformance Control Agents Stabilized by Polymer

et al. 2022

View full text Add to dashboard Cite

To improve the dispersion stability of phenol-formaldehyde resin (PFR) particles in simulated oilfield injection water and their propagation ability in petroleum reservoir, a hydrophobically associating polymer (HAP) was employed as a stabilizer in this paper. The dispersion stability of PFR in the injection water was studied by measuring turbidity as a function of time. In addition, the migration property of the PFR/HAP dispersion was evaluated by both cellulose membrane filtration and sand packs-flooding experiments. The results show that HAP can stabilize the PFR dispersion prepared with the simulated injection water by forming PFR/HAP complex molecular aggregates. These aggregates can migrate in sand packs with strong flow resistance due to deformation or disaggregation of the aggregates when passing through the pore throat. Oil recovery was improved by up to 21.1% on the basis of water flooding, and the higher the concentration of PFR/HAP dispersion system, the better the oil recovery effect. Moreover, the cycle of log-jamming/dispersion of the aggregates leads to their penetrations through the bigger pores in the sand packs with a higher flow resistance than water. This process can improve the conformance of water in high permeability sand packs on a micro/macro scale and thus divert more water into low permeability sand packs. Therefore, more oil could be recovered from the low permeability sand packs. Moreover, the bigger the sand pack’s permeability ratio, the lower the oil recovery rate by waterflood, and the more the incremental oil can be recovered by the PFR/HAP flood.

show abstract

Hydrophobic effect further improves the rheological behaviors and oil recovery of polyacrylamide/nanosilica hybrids at high salinity

Cited by 21 publications

References 43 publications

Effects of Various Nanoparticles on the Rheological Properties of Carboxylic Cellulose Nanofibers and the Compound System’s Application in Enhanced Oil Recovery

Effects of Various Nanoparticles on the Rheological Properties of Carboxylic Cellulose Nanofibers and the Compound System’s Application in Enhanced Oil Recovery

Deformation and breakup of water droplets containing polymer under a DC electric field

Experimental Study on Phenol-Formaldehyde Resin Aggregates as In-Depth Conformance Control Agents Stabilized by Polymer

Contact Info

Product

Resources

About