Analysis of Capillary–Viscous–Gravity Forces in Biopolymer Flooding with a Sensitivity Analysis on Polymer and Porous Medium Parameters

Hamidpour, Esmaeil; Mirzaei‐Paiaman, Abouzar; Ramazani, S A Ahmad; Hatami, Ashkan

doi:10.1080/01932691.2013.858347

Cited by 6 publications

(5 citation statements)

References 14 publications

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“…Figure 4 shows that the established RRF values of the three polymers in porous media gradually decrease as the permeability increases, and vice versa. The reason is that the permeability in the porous medium is inversely proportional to its surface area 38 . More adsorption sites can be provided for the polymer solution to establish a higher RRF in the porous media when the permeability is smaller.…”

Section: Resultsmentioning

confidence: 99%

“…The reason is that the permeability in the porous medium is inversely proportional to its surface area. 38 More adsorption sites can be provided for the polymer solution to establish a higher RRF in the porous media when the permeability is smaller. When the permeability is higher, the pore throat radius is larger and less polymer solution will stay on the surface.…”

Section: Nmr Core Oil Displacement Experimentsmentioning

confidence: 99%

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Mobility control capability of a modified chitosan hyperbranched polymer in porous media

Chen

Wang

et al. 2022

J of Applied Polymer Sci

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The residual resistance factor (RRF) is an important parameter expressing the mobility control capability of the polymer, and it is related to the polymer molecular structure. This study investigated the ability of three polymers with different molecular structures to establish RRF in a one‐dimensional sand pack model at different permeabilities. In addition, the static adsorption capacity of the three polymers on the rock surface was investigated, and the mechanism of the polymer retention in porous media was explored by changing the wettability of the rock surface. Furthermore, the microscopic morphological changes of the polymers before and after passing through the porous media were observed by environmental scanning electron microscopy. Finally, nuclear magnetic resonance core flooding experiments were used to investigate the oil displacement characteristics of the three polymers in the core. T Results show that the ability of the three polymers to establish RRF gradually decreases with the increase in permeability. Still, the modified chitosan hyperbranched polymer (HPDACS) has the best ability to establish RRF in porous media with the largest static adsorption equilibrium amount of 1249 μg/g. Mechanical capture is the dominant mechanism for HPDACS to establish retention in porous media. In addition, HPDACS has a better ability to enhance recovery. It can improve oil recovery by 20.43%, which is higher than that by dendritic polymer HPDA at 16.34% and partially hydrolyzed polyacrylamide at 10.07%. HPDACS can establish a larger resistance in the macropores of the core. Thus, the remaining oil is better driven in the medium and small pores. This finding indicates that HPDACS has excellent potential for oil displacement.

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Section: Resultsmentioning

confidence: 99%

Section: Nmr Core Oil Displacement Experimentsmentioning

confidence: 99%

Mobility control capability of a modified chitosan hyperbranched polymer in porous media

Chen

Wang

et al. 2022

J of Applied Polymer Sci

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show abstract

“…In light of the research and theory of Huang, the permeability of porous medium was correlated negatively with its surface area. Consequently, the porous medium with high permeability could provide less adsorption sites for the polymer molecule . Meanwhile, the increase of permeability would enlarge the rock holes and pore throats, so the trapped amount of polymer solution by the porous medium would also be reduced .…”

Section: Results and Discussionmentioning

confidence: 99%

“…Consequently, the porous medium with high permeability could provide less adsorption sites for the polymer molecule. 41 Meanwhile, the increase of permeability would enlarge the rock holes and pore throats, so the trapped amount of polymer solution by the porous medium would also be reduced. 42 For these two reasons, the retention of polymer solution in porous media was reduced, and the ability to construct the RRF was also gradually reduced with the increase of permeability.…”

Section: Effect Of Polymer Concentrationmentioning

confidence: 99%

Effect of Degree of Branching on the Mechanism of Hyperbranched Polymer To Establish the Residual Resistance Factor in High-Permeability Porous Media

et al. 2016

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To improve a polymer's oil recovery power, it is imperative to discuss its residual resistance factor (RRF), which is a significant parameter in the field and is associated with the polymer molecular structure. This study investigated the capability of three kinds of hyperbranched polymers (HPDAs) with various degrees of branching to establish the RRF in high permeability porous media by way of a one-dimensional sandpack model under different polymer solution concentrations, permeabilities, and injection rates. In addition, the mechanisms of these polymers to establish the RRF were surveyed through altering the wettability of the rock surface. Furthermore, the diameter distribution and microstructure of the injected and produced polymer solution were determined by utilizing dynamic light scattering and scanning electron microscopy, respectively. The experimental results showed that the RRFs of three kinds of hyperbranched polymers were different in variation trend with changes in external conditions. As the degree of branching increased, the dominant mechanism of the polymer to establish retention and the RRF gradually shifted from surface adsorption to mechanical trapping. And the larger the proportion of the mechanical trapping effect was, the stronger the ability to build the RRF became. This was mainly because that the higher the degree of branching of the polymer is, the higher the branched chain number is, the larger the hydrodynamic radius of polymer solution becomes, the stronger the structure formed between end branches becomes, and the lesser the damage caused to the polymer by high permeability medium is.

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“…The proportion of the gravity type was mor than 30% [27]. Hamidpour et al investigated the effect of gravity, viscous force, and ca pillary force on polymer flooding, and found that viscous force plays a dominant role, and gravity and capillary force affect the residual oil distribution [28]. Rezaeiakmal et al in vestigated the effect of gravity on polymer flooding in homogeneous pores under the ef fect of bubbles by microscopic visualization experiments to determine that the recovery of residual oil can be substantially improved [29].…”

Section: Introductionmentioning

confidence: 99%

The Micro-Flow Mechanism of Polymer Flooding in Dual Heterogeneous Reservoirs Considering the Wettability

Zhong,

Shi,

et al. 2023

Polymers

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There have been some studies conducted about the single factor viscoelasticity of polymer solution or wettability effect on the micro-flow mechanism of polymer flooding. In this paper, the flow mechanism of polymer solution in dual heterogeneous reservoir considering the wettability and gravity was studied. The influences of wettability and rock particle shape on flow characteristics were studied based on the characteristics of saturation and pressure distribution. Compared with the simulation results of polymer flooding in three different rock particle shapes porous media, the oil displacement efficiency of the circular particle model is the highest at 91.57%, which is 3.34% and 11.48% higher than that in the hexagonal and diamond models, respectively. The influence of wettability was studied by the circular particle model. The oil displacement efficiency under water-wet conditions was higher than that under oil-wet conditions. The displacement process considering gravity was affected by the crossflow caused by gravity and viscous force, and the micro-oil displacement efficiency was 9.87% lower than that of non-gravity. Considering the wettability, vertical crossflow will be formed. The oil displacement efficiency under water-wet conditions was 3.9% higher than in oil-wet conditions. The research results can not only expand and enrich the micro-flow mechanism of viscoelastic polymer solution, but also provide reference and guidance for polymer flooding scheme design.

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Analysis of Capillary–Viscous–Gravity Forces in Biopolymer Flooding with a Sensitivity Analysis on Polymer and Porous Medium Parameters

Cited by 6 publications

References 14 publications

Mobility control capability of a modified chitosan hyperbranched polymer in porous media

Mobility control capability of a modified chitosan hyperbranched polymer in porous media

Effect of Degree of Branching on the Mechanism of Hyperbranched Polymer To Establish the Residual Resistance Factor in High-Permeability Porous Media

The Micro-Flow Mechanism of Polymer Flooding in Dual Heterogeneous Reservoirs Considering the Wettability

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