Synthesis and property evaluation of a novel polyacrylamide‐montmorillonite composite for water shutoff and profile control in high salinity reservoirs

Zhao, Tong; Xing, Jiyue; Pu, Wanfen; Dong, Zhiming; Yuan, Chengdong; Peng, Guo-Feng; Jin, Fang; Xia, Ji-Jia

doi:10.1002/pc.23945

Cited by 15 publications

(3 citation statements)

References 24 publications

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“…In recent years, the production of polyacrylamide (PAM) has reached millions of tonnes and has a wide range of applications in many fields. Especially in oil extraction [ 1 ], PAM has become a vital chemical additive because of its excellent performance. PAM is mainly used as a filter loss reducer, flocculant, diluent, plugging agent, etc., in oil extraction.…”

Section: Introductionmentioning

confidence: 99%

Research Progress of Molecular Simulation in Acrylamide Polymers with High Degree of Polymerization

Liu,

Feng,

et al. 2024

Molecules

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Acrylamide polymers with a high degree of polymerization are widely used in petroleum production. It is of great significance to study the oil displacement mechanism of acrylamide polymers with a high degree of polymerization from the micro level. In recent years, the rapid development of computer molecular simulation technology has filed the gaps in macroscopic experiments and theories. This technology has been highly valued in the study of the molecular behaviour of polymer systems. In this paper, the research progress of molecular simulation applied to high-polymerization-degree acrylamide polymer is summarized. The application status of acrylamide polymer flooding, the analysis of polymer flooding mechanisms, and the research progress of molecular simulation in acrylamide linear and crosslinked polymers are expounded. Finally, the development prospect of acrylamide polymer research is given, and suggestions are put forward in terms of simulation direction and simulation tools.

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Section: Introductionmentioning

confidence: 99%

Research Progress of Molecular Simulation in Acrylamide Polymers with High Degree of Polymerization

Liu,

Feng,

et al. 2024

Molecules

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“…Zhang C. et al [14] studied a new high-strength gel ABP system for fractured reservoirs with high salinity and low permeability. The temperature resistance, salt resistance and plugging characteristics of the gel system were studied at 29,500 mg/L salinity.…”

Section: Introductionmentioning

confidence: 99%

Experimental studies on the performance evaluation of water-soluble polymers used as temporary plugging agents

Wu¹,

Zhang²,

Zhou³

et al. 2023

Front. Phys.

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The performance of the temporary plug is a key factor in determining the success of loss-circulation control and temporary plug diversion fracturing. Due to the complexity of geomechanics and working conditions, current commonly used temporary plug agents face problems such as low plug strength and efficiency, large filtration losses due to failure to form filter cakes, and slow degradation affecting the recovery of fracture conductivity. A novel idea for the development of a novel water-soluble polymer plug for fracking is proposed, namely, low-to middle-molecule weight + reinforced chain rigidity + supramolecular aggregation. Using sodium bisulfite and potassium sulfate as initiators, AA, AM, and AMPS as grafting monomers, and SM as hydrophobic functional monomers, the AM-AA-AMPS-SM copolymer was prepared by polymerization. The developed new temporary plugging agent was completely degraded at 70°C for 5–8 h by carrying out experimental evaluation tests, such as water absorption expansion rate, swelling kinetics, density, post-dissolution viscosity, strength of the temporary plugging agent and post-degradation conductivity. After degradation, the viscosity of the solution is 2.5–3.6 mPa s with good fluidity and no gel remnants. The density of the temporary plug material is about 1.14 g/cm3. The absorption expansion rate was 25.8 g/g. The pressure is 60.1 MPa when the thickness of the granular temporary plug is 0.4 cm. Under experimental conditions, the fracture conductivity was found to be 69–123 D*cm at a closing pressure of 30 MPa after degradation of the temporary plug. The test results demonstrate that the new temporary plug agent, with its high plug strength, temperature-controlled degradation, reflux stability and effective self-support after degradation, can meet the requirements of drilling plug and temporary plug fracturing technologies.

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“…The optimized modifier reinforces the copolymer backbone [ 42 ]. Furthermore, methacryloyloxy ethyl dimethyl hexadecyl ammonium bromide (DMB), which is a quaternary ammonium compound with a terminal double bond, acts as an intercalator to Na-MMt, forming organic MMt (O-MMt) [ 43 ].…”

Section: Introductionmentioning

confidence: 99%

Enhancing the Properties of Water-Soluble Copolymer Nanocomposites by Controlling the Layer Silicate Load and Exfoliated Nanolayers Adsorbed on Polymer Chains

Wang

Chen

et al. 2023

Polymers

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Novel polymer nanocomposites of methacryloyloxy ethyl dimethyl hexadecyl ammonium bromide-modified montmorillonite (O-MMt) with acrylamide/sodium p-styrene sulfonate/methacryloyloxy ethyl dimethyl hexadecyl ammonium bromide (ASD/O-MMt) were synthesized via in situ polymerization. The molecular structures of the synthesized materials were confirmed using Fourier-transform infrared and 1H-nuclear magnetic resonance spectroscopy. X-ray diffractometry and transmission electron microscopy revealed well-exfoliated and dispersed nanolayers in the polymer matrix, and scanning electron microscopy images revealed that the well-exfoliated nanolayers were strongly adsorbed on the polymer chains. The O-MMt intermediate load was optimized to 1.0%, and the exfoliated nanolayers with strongly adsorbed chains were controlled. The properties of the ASD/O-MMt copolymer nanocomposite, such as its resistance to high temperature, salt, and shear, were significantly enhanced compared with those obtained under other silicate loads. ASD/1.0 wt% O-MMt enhanced oil recovery by 10.5% because the presence of well-exfoliated and dispersed nanolayers improved the comprehensive properties of the nanocomposite. The large surface area, high aspect ratio, abundant active hydroxyl groups, and charge of the exfoliated O-MMt nanolayer also provided high reactivity and facilitated strong adsorption onto the polymer chains, thereby endowing the resulting nanocomposites with outstanding properties. Thus, the as-prepared polymer nanocomposites demonstrate significant potential for oil-recovery applications.

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Synthesis and property evaluation of a novel polyacrylamide‐montmorillonite composite for water shutoff and profile control in high salinity reservoirs

Cited by 15 publications

References 24 publications

Research Progress of Molecular Simulation in Acrylamide Polymers with High Degree of Polymerization

Research Progress of Molecular Simulation in Acrylamide Polymers with High Degree of Polymerization

Experimental studies on the performance evaluation of water-soluble polymers used as temporary plugging agents

Enhancing the Properties of Water-Soluble Copolymer Nanocomposites by Controlling the Layer Silicate Load and Exfoliated Nanolayers Adsorbed on Polymer Chains

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