On the reduction of the residual oil saturation through the injection of polymer and nanoparticle solutions

Song, Wenxiu; Hatzignatiou, D.G.

doi:10.1016/j.petrol.2021.109430

Cited by 12 publications

(14 citation statements)

References 58 publications

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“…Meanwhile, clay content has an important effect on the polymer flooding efficiency, and higher clay content leads to higher polymer adsorption and low displacement efficiency. 3 The swelling capacity of different clays also matters to the formation permeability, the impact of which should be considered to choosing the polymer with appropriate molecular weight in polymer flooding. Therefore, the content and dispersion occurrence of clay minerals play an important role in the design of polymer flooding schemes, including the choice of oil displacement agents, optimization of injection parameters, and so forth.…”

Section: Resultsmentioning

confidence: 99%

“…The content and dispersion occurrence of clay minerals are the main factors affecting the microscopic distribution of the remaining oil. Meanwhile, clay content has an important effect on the polymer flooding efficiency, and higher clay content leads to higher polymer adsorption and low displacement efficiency . The swelling capacity of different clays also matters to the formation permeability, the impact of which should be considered to choosing the polymer with appropriate molecular weight in polymer flooding.…”

Section: Resultsmentioning

confidence: 99%

“…Polymer flooding is one of the most important enhanced oil recovery (EOR) technology, which can change the properties of the fluid and rock’s wettability, reduce the interfacial tension, and increase the water viscosity and mobility ratios compared with waterflooding. − Druetta and Picchioni performed a two-dimensional model multiphase simulation in macroscale and microscale recovery processes to show that polymers can increase recovery up to 7.6 to 15.4% when compared to the traditional waterflooding techniques . Daqing Oilfield has entered the period of extra-high water cut period, and the remaining oil is dispersed with developmental difficulties such as low flooding efficiency and ineffective cycles after polymer flooding, and there is still a huge amount of remaining reserves after polymer flooding, so it is stringent to study the microscopic distribution characteristics of the remaining oil in polymer-flooded reservoirs. − The distribution characteristics and occurrence states of remaining oil after polymer flooding are the basis of the potential tapping of remaining oil.…”

Section: Introductionmentioning

confidence: 99%

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Study on Microscopic Distribution Characteristics of the Remaining Oil in Polymer-Flooded Reservoirs

et al. 2022

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Polymer flooding is an effective enhanced oil recovery (EOR) technology used in Daqing Oilfield. Microscopic distribution of remaining oil in polymer-flooded reservoirs is more complicated in comparison with waterflooded reservoirs. In this paper, UV excitation, frozen section-laser confocal technology, and three-dimensional reconstruction technology were employed to investigate the distribution law and occurrence state of the microscopic remaining oil in polymer-flooded Daqing Oilfield. With these methods, the occurrence states of the microscopic remaining oil distribution in different washing degrees and displacement locations were analyzed, and the remaining oil distribution before and after polymer flooding was compared quantitatively. The changes and microscopic distribution characteristics of crude oil components in the process of polymer flooding were clarified, and the relationship between clay minerals and the microscopic remaining oil distribution was discussed. Based on the statistical analysis of experimental results, the remaining oil of the free state decreases gradually, while the remaining oil of the bound state increases as the washing degree increases. In addition, the remaining oil in the distributary line is more enriched than the mainstream line after polymer flooding. Compared with waterflooding, the remaining oil of the free state becomes more, while the remaining oil of the bound state becomes less after polymer flooding. The frozen section-laser confocal experimental results also indicate that the proportion and distribution characteristics of the remaining oil components have been changed, and heavy components increase while light components decrease in the polymer-flooded stage. This research performs the quantized characterization and detailed analysis of remaining oil systematically and lays the foundation for remaining oil prediction and potential tapping in polymer-flooded reservoirs.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Study on Microscopic Distribution Characteristics of the Remaining Oil in Polymer-Flooded Reservoirs

et al. 2022

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“…Polymer flooding methods have been developed to reduce IFT, maintain thermal stability at a higher temperature, maintain good rheological properties at critical conditions such as higher salinity, higher pressure, and higher shear rate, and improve the displacement efficiency by injecting higher-viscosity solutions . In recent times, nanocomposites–polymer, surfactant–polymer–nanoparticles, polymer–ionic liquids, and polymer-coated nanoparticles have been developed for better sweep efficiency results. − …”

Section: Recent Developments In Polymer Floodingmentioning

confidence: 99%

“…Water-soluble polymers are polar in nature. Polymer flooding works on four main mechanisms, namely, mobility control, fractional flow improvement, disproportionate permeability reduction, and viscoelastic effect. − Mobility control, fractional flow improvement, and disproportionate permeability reduction are the main mechanisms that are responsible for improvement of the volumetric displacement efficiency, while the mechanism of the viscoelastic effect is responsible for improvement of the microscopic displacement efficiency. , …”

Section: Introductionmentioning

confidence: 99%

A Perspective Review on the Current Status and Development of Polymer Flooding in Enhanced Oil Recovery Using Polymeric Nanofluids

Ambaliya

Bera

2023

Ind. Eng. Chem. Res.

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The globally increasing demand for crude oil has prompted the oil industry to enhance oil production from primary, secondary, and tertiary recovery methods to fulfill the global requirement. Therefore, enhanced oil recovery (EOR) is expected to increase its importance in the coming years. Because of limited efficiency, applicability, and higher gas and thermal injection costs, chemical EOR processes have been considered as an alternative in some special cases. Chemical EOR processes are accepted widely because of their higher efficiency, economic and technical feasibility, and optimum capital cost. Therefore, research of novel chemical compounds is immense in the oil industry. Research of nanotechnology in the petroleum industry has attracted attention among all novel chemical compounds in the past few years. This work focuses on the review of previous research regarding the current scenario of polymer flooding, challenges of polymer flooding, polymeric nanofluid in EOR, recent developments in polymer flooding, characteristics of polymeric nanofluids, prospects, and economic feasibility for polymeric nanofluids’ applications in EOR. This paper also reviews the characterization of polymeric nanofluids such as rheology, stability, wettability alteration, interfacial tension reduction, and absorption control. It has been found from a literature review that polymeric nanofluids are more effective in oil recovery considering viscosity modification, stability enhancement, and chemical adsorption control. Oil recovery can be additionally increased by up to 10–15% original-oil-in-place applying polymeric nanofluids.

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Synthesis of Hydrophobically Associating Polymers with Natural Product Structures by a One‐Pot Method – Comparison of Ethanol Treatment and Freeze‐Drying

Wang

Jia

et al. 2023

ChemistrySelect

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Polyacrylamide‐based hydrophobically associating polymers (HAPAM) containing capsaicin derivatives and itaconic acid with acrylamide (AM) and methacrylic acid (MAA) as the main bodies, and N‐vinylpyrrolidone (NVP) as the functional monomer are prepared by a one‐pot synthesis of the soap‐free emulsion polymerization process. The structure is characterized by fourier transform infrared (FTIR) and 1H nuclear magnetic resonance (1H NMR), and thermal gravimetric analyzer (TGA) explores thermal stability. For achieving proper purification, excellent preservation and convenient transportation of the polymer and to advance its practical engineering applications, two different treatments, namely ethanol washout and freeze‐drying, are carried out and compared. The surface morphology observation manifests that the freeze‐drying products (DHPAM) better protect the three‐dimensional cross‐linked network structure formed by various supramolecular forces such as hydrophobic association, electrostatic and hydrogen bonding inside the polymer than the ethanol washout products (EHPAM), which well explains why DHPAM has lower critical association concentration (CAC), greater resistance to high temperature and high salt, and better corrosion inhibition performance than EHPAM. It is significant for strengthening the application of polymers in related fields, especially oil and gas extraction.

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On the reduction of the residual oil saturation through the injection of polymer and nanoparticle solutions

Cited by 12 publications

References 58 publications

Study on Microscopic Distribution Characteristics of the Remaining Oil in Polymer-Flooded Reservoirs

Study on Microscopic Distribution Characteristics of the Remaining Oil in Polymer-Flooded Reservoirs

A Perspective Review on the Current Status and Development of Polymer Flooding in Enhanced Oil Recovery Using Polymeric Nanofluids

Synthesis of Hydrophobically Associating Polymers with Natural Product Structures by a One‐Pot Method – Comparison of Ethanol Treatment and Freeze‐Drying

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