Adsorption of Water-Soluble Polymers on High Surface Area Clays

Ahmed, Hany El-Sayed; Glass, J. Edward; McCarthy, Gregory J.

doi:10.2118/10101-ms

Cited by 10 publications

(6 citation statements)

References 25 publications

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“…The deflocculated system may increase the adsorption. 45,49,50 3.3. Effect of Clay Mineral Percentage on Aerosol-OT Dynamic Adsorption.…”

Section: Resultsmentioning

confidence: 99%

“…Generally, the molecular weight of alkali lignin prevents its flow in the internal surface area. 49 Overall, lignin covers the solid surface, thereby minimizing the loss of the surfactant. The alkali lignin covers the surface and establishes the hydrogen bond to prevent Aerosol-OT adsorption.…”

Section: Resultsmentioning

confidence: 99%

“…Consequently, the forces of repulsion produced an unstable condition. The deflocculated system may increase the adsorption. ,, …”

Section: Resultsmentioning

confidence: 99%

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Toward Reducing Surfactant Adsorption on Clay Minerals by Lignin for Enhanced Oil Recovery Application

et al. 2021

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The significant loss of surfactants during reservoir flooding is a challenge in oil field operations. The presence of clay minerals affects the surfactant performance, resulting in surfactant losses. This is because the mineralogical composition of the reservoir results in unpredicted adsorption quantity. Therefore, this paper seeks to investigate Aerosol-OT’s adsorption on different quartz/clay mineral compositions during the flow. Also, it investigates adsorption mitigation by preflushing with lignin. The dynamic experiments were conducted on sand packs composed of quartz-sand and up to a 7% clay mineral content. The results obtained from the surfactant losses were compared with/without lignin preflush at different pH values. The main observation was the direct relationship between increasing the composition of clay minerals and the surfactant pore volume required to overcome the adsorption. The highest adsorption calculated was 46 g/kg for 7% kaolinite. Moreover, lignin successfully reduced the adsorption of Aerosol-OT by 60%. Therefore, the results demonstrate that the effects of the clay mineral content on adsorption could be efficiently minimized using lignin at a high pH.

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“…The deflocculated system may increase the adsorption. 45,49,50 3.3. Effect of Clay Mineral Percentage on Aerosol-OT Dynamic Adsorption.…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Toward Reducing Surfactant Adsorption on Clay Minerals by Lignin for Enhanced Oil Recovery Application

et al. 2021

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“…When permeability is low, the ratio of pore-wall surface to pore volume is high, corresponding to higher polymer adsorption. Consistently, polymer hydrodynamic retention-typically modeled through an adsorption isotherm-is known to increase with increasing pore velocity [36], and therefore scales with the inverse of permeability [32,37]. Ahmed et al [38], found that polymer adsorption generally decreases with increasing viscosity in rocks with high clay content.…”

Section: Factors That Impact Performance In Polymer Floodingmentioning

confidence: 94%

Investigation of an Improved Polymer Flooding Scheme by Compositionally-Tuned Slugs

2020

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Polymer flooding is an effective enhanced oil recovery technology used to reduce the mobility ratio and improve sweep efficiency. A new polymer injection scheme is investigated that relies on the cyclical injection of low-salinity, low-concentration polymer slugs chased by high-salinity, high-concentration polymer slugs. The effectiveness of the process is a function of several reservoir and design parameters related to polymer type, concentration, salinity, and reservoir heterogeneity. We use reservoir simulations and design-of-experiments (DoE) to investigate the effectiveness of the proposed polymer injection scheme. We show how key objective functions, such as recovery factor and injectivity, are impacted by the reservoir and design parameters. In this study, simulations showed that the new slug-based process was always superior to the reference polymer injection scheme using the traditional continuous injection scheme. Our results show that the process is most effective when the polymer weight is high, corresponding to large inaccessible pore-volumes, which enhances polymer acceleration. High vertical heterogeneity typically reduces the process performance because of increased mixing in the reservoir. The significance of this process is that it allows for increased polymer solution viscosity in the reservoir without increasing the total mass of polymer, and without impairing polymer injectivity at the well.

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“…Mechanical degradation was simulated by shearing the polymer solution using a waring blender at different speeds, that is, 3500, 7000, and 10 500 rpm for 20 s.…”

Section: Methodsmentioning

confidence: 99%

Effect of microscopic aggregation behavior on polymer shear resistance

Shi

Zhu

et al. 2019

J of Applied Polymer Sci

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The study of polymer aggregation behavior effect on shear resistance shed light on the synthesis of antishear polymer for oil displacement and enhances the application effect of polymer flooding. The effects of mechanical degradation on the properties of polymer solutions were studied by using partially hydrolyzed polyacrylamide (HPAM), hydrophobically modified HPAM (HMPAM), and dendritic hydrophobic associative polymers (DHAP), which are characterized by "granular," "chain," and "cluster" aggregation behavior, respectively. The results show that mechanical shearing can dramatically reduce the performance of polymer solution. The shearing resistance can be effectively enhanced by improving the polymer aggregation behavior. After being strongly sheared, hydrophobically associating polymers can still partially restore its network through hydrophobic association, therefore rebuild the solution viscosity. For DHAP, the broken molecular chains distribute more evenly in solution after shearing. In addition, the strength of reconstructed network structure of DHAP is better than that of HMAPM, which implies a better shear resistance. Furthermore, the hydrophobic association of linear polymers will increase their static adsorption on quartz sand. Meanwhile, DHAP with stronger spatial structure has less static adsorption, which is beneficial to maintain a higher polymer concentration in solution.

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Adsorption of Water-Soluble Polymers on High Surface Area Clays

Cited by 10 publications

References 25 publications

Toward Reducing Surfactant Adsorption on Clay Minerals by Lignin for Enhanced Oil Recovery Application

Toward Reducing Surfactant Adsorption on Clay Minerals by Lignin for Enhanced Oil Recovery Application

Investigation of an Improved Polymer Flooding Scheme by Compositionally-Tuned Slugs

Effect of microscopic aggregation behavior on polymer shear resistance

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