Synthesis and characterization of a graft-modified copolymer for enhanced oil recovery

Wang, Ruolan; Pu, Wanfen; Dang, Sisi; Jiang, Feng; Zhao, Shuai

doi:10.1016/j.petrol.2019.106473

Cited by 22 publications

(8 citation statements)

References 33 publications

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“…The hydrophobic parts will interact with the rock surface, resulting in increased adsorption. With increasing polymer adsorbed and retained on the rock surface, a greater residual resistance can be established, thereby effectively controlling the migration and flow of water flooding and ultimately enhance oil recovery …”

Section: Resultsmentioning

confidence: 99%

“…This was attributed to the dehydration of the sample caused by the rupture of the hydrogen bond of the polar group of the polysaccharide. 22,38 The second weight loss stages of XG and MXG were from 266.7 to 322.1 °C and from 267.8 to 321.2 °C, respectively. According to the DTG curves, the maximum decomposition rate was achieved when the temperature was 292 °C.…”

Section: Methodsmentioning

confidence: 99%

“…With increasing polymer adsorbed and retained on the rock surface, a greater residual resistance can be established, thereby effectively controlling the migration and flow of water flooding and ultimately enhance oil recovery. 38 3.11. Polymer Flooding Experiment.…”

Section: Absorption Of Mxgmentioning

confidence: 99%

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Enhanced Oil Recovery Performance and Solution Properties of Hydrophobic Associative Xanthan Gum

Qin

Liu

et al. 2021

Energy Fuels

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Xanthan gum (XG) is one of the widely used biopolymers in oilfield development. It has low cost and will not pollute the environment. However, its limited temperature and salt tolerance restricts its application in high temperature and high salt reservoirs. An environmentally friendly hydrophobic associative polymer was prepared by grafting long-chain alkyl groups onto xanthan gum through an etherification reaction for enhanced oil recovery (EOR). The hydrophobically modified xanthan gum (MXG) was characterized by Fourier transform infrared spectroscopy (FT-IR), nuclear magnetic resonance spectroscopy (NMR), gel permeation chromatography (GPC), and thermogravimetric analysis (TGA). Due to the hydrophobic association, MXG had excellent thickening, rheological properties, antiaging, temperature, and salt resistance properties. In the 30 g/L NaCl solutions, the viscosity of MXG (335 mPa s) was about 3 times that of XG (115.3 mPa s) at 65 °C. Whether in a high-salt solution (20 g/L NaCl) or reservoir injection water (mineralization of water is 7542 mg/L), modified xanthan gum can show good antiaging properties. The polymer flooding experiments showed that EOR of MXG is 25%, 7% higher than that of XG. The macroscopic mechanism of MXG flooding was studied. In summary, MXG has a wide range of applications in EOR.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Enhanced Oil Recovery Performance and Solution Properties of Hydrophobic Associative Xanthan Gum

Qin

Liu

et al. 2021

Energy Fuels

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“…Polymeric materials with hydrophobic properties have also attracted attention for their effectiveness at separating oils and organic solvents from water. [158][159][160][161][162] Polymer-based materials are also inexpensive to manufacture, can assume various forms, including sponges, [163][164][165][166][167] powders, [168][169][170] pads, and booms and have easily transformable surface characteristics. Among them, sponge-type sorbents are usually manufactured as a polyurethane (PU) based sponge and are already in wide use as oil sorbents for their high porosity, high resilience, low density, high adsorption, and easily-scalable fabrication.…”

Section: Oleophilic Porous Adsorbentmentioning

confidence: 99%

A Role for Newly Developed Sorbents in Remediating Large‐Scale Oil Spills: Reviewing Recent Advances and Beyond

Kim

Zhang

Chung

et al. 2021

Advanced Sustainable Systems

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The conservation of ocean and freshwater have been crucial issues over the past decades, and oil/water separation is a well‐known technology to restore polluted water systems. In the meantime, oil sorbents serve as a promising means of achieving water conservation to recover from oil spills, which require a multi‐factorial approach to review high selectivity, capacity, and rate of oil recovery. However, reusability is a critical component to consider in incidents with large‐scale spills. With the development of sorbent technology, some studies have progressed to explore surface engineering and material design for high oil sorption capacity and durability. Thus, this systemic review, a summary of sorbent developments, serves as a guide to understanding practical applications that can apply to large‐scale oil spills and recognize remaining issues. In this review, the oil weathering process and oil sorption mechanisms in relation to the characteristics of target pollutants are introduced. Then, this comprehensive review focuses on materials in advanced sorbents. These materials have properties including, aligned channels for fast sorption, self‐heating capabilities for viscous oil cleanup, and magnetic‐responsiveness to enhance a collection of final products. The perspective and challenges for the next generation of oil spills remediation technology‐based oil sorbents materials are finally presented in the last section.

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“…Sand-pack flooding tests showed higher displacement efficiency than HPAM [20]. Therefore, welan gum solution has a unique property of maintaining stable viscosity at high temperatures (150 • C) in a wide range of pH values (pH = 2-12), making it a good candidate for use in reservoirs with high temperatures and high salt content [21,22]. Zhou et al [18] Welan gum, HPAM Welan gum solution is pseudoplastic fluid with good viscoelasticity, and is affected little by sodium ion and potassium ion.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Welan Gum on Montmorillonite and Its Influencing Factors

Ke-jian

et al. 2022

Polymers

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Welan gum is one of the most promising polymers used in polymer flooding for enhancing oil recovery, due to its excellent temperature resistance and salt-tolerance performance. However, welan gum, as a polymer with higher molecular weight, can be adsorbed and detained in the pore throat of the reservoir, which is characterized by a smaller size. Montmorillonite, a kind of clay mineral with high content in reservoir rocks, has strong adsorption capacity. Therefore, the adsorption behavior of welan gum on montmorillonite, as well as its influencing factors, are studied in this paper. The results show that the adsorption capacity is 2.07 mg/g. The adsorption capacity decreased with the increase in temperature. Both acidic and alkaline conditions reduced the adsorption capacity. The existence of inorganic salt affected the adsorption capacity. In addition, the higher the cation value, the lower the adsorption capacity. The characterization tests showed that the adsorption of welan gum on montmorillonite was characterized by physical adsorption and surface adsorption, indicating that there were no changes in the internal structure of montmorillonite. This study provides feasible methods to reduce the amount of welan gum adsorbed on montmorillonite, which is of great significance for reducing the permeability damage caused by welan gum adsorption and promoting the application of welan gum in polymer flooding for enhancing oil recovery.

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Synthesis and characterization of a graft-modified copolymer for enhanced oil recovery

Cited by 22 publications

References 33 publications

Enhanced Oil Recovery Performance and Solution Properties of Hydrophobic Associative Xanthan Gum

Enhanced Oil Recovery Performance and Solution Properties of Hydrophobic Associative Xanthan Gum

A Role for Newly Developed Sorbents in Remediating Large‐Scale Oil Spills: Reviewing Recent Advances and Beyond

Adsorption of Welan Gum on Montmorillonite and Its Influencing Factors

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