Influence of Hydrolyzed Polyacrylamide (HPAM) Molecular
The influence of the molecular weight (Mw) of hydrolyzed polyacrylamide (HPAM) on the cross-linking reaction of HPAM/Cr3+ and the transportation of HPAM/Cr3+ in microfractures is systematically studied using viscometry, ultraviolet–visible absorption spectrophotometry, and displacement experiment with a visual microfractured model.
Herein, the interaction between partially hydrolyzed polyacrylamide (HPAM) and urea (UR) in an aqueous solution was characterized via differential scanning calorimetry (DSC) and two-dimension correlation spectra (2DCOS). The rheological properties of the HPAM solution (2000 and 2500 mg L−1) were studied as a functi
Nanoparticles for Enhanced Oil Recovery: Influence of pH
Linked polymer solution (LPS) is a nanoparticle system that consists of partially hydrolyzed polyacrylamide (HPAM) cross-linked by aluminum (III). The source of aluminum is an aluminum citrate (AlCit) complex, where citrate serves as a carrier ligand.
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Polyacrylamide degradation and its implications
The hydrolyzed form of polyacrylamide (HPAM), a co-polymer of acrylamide and acrylic acid, is the most widely used anionic PAM in oil and gas development as well as in soil conditioning. 1,9,12,21
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Influences of partially hydrolyzed polyacrylamide (HPAM
The influences of temperature and concentration of partially hydrolyzed polyacrylamide (HPAM) residue on the treatment of simulated oily wastewater from polymer flooding were studied in this paper. Polyaluminum chloride (PAC) and cationic polyacrylamide (CPAM) were used as flocculant, respectively.
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Hydrolysis and thermal stability of partially hydrolyzed
Partially hydrolyzed polyacrylamide (HPAM) is the water‐soluble polymer most often used in flooding applications in the petroleum industry. However, in aqueous solutions at high temperatures, HPAM undergoes hydrolysis of the lateral amide groups, and the presence of salts in the solution can lead to precipitation of this polymer.
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Effect of partially hydrolyzed polyacrylamide
The molecular weight and hydrolysis degree of HPAM have no significant influences on these properties. The stability of PWPF can be enhanced by increasing HPAM concentration. Dependency of frequency and concentration was observed for the interfacial dilational viscoelasticity.
Get PriceInfluence of molecular interplay on the HPAM/UR
As a type of polymer flooding agent, partially hydrolyzed polyacrylamide (HPAM) has received significant interest due to its applications in tertiary oil recovery, especially in reducing liquid permeability, increasing sweep efficiency or microscopic oil-displacing efficiency, and some other aspects. 1–3 It is vital to the mechanism of polymer flooding for enhanced oil recovery that the polymer flooding agents exhibit a relatively higher viscoelasticity performance following injection. 4
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Influence of molecular interplay on the HPAM/UR
Herein, the interaction between partially hydrolyzed polyacrylamide (HPAM) and urea (UR) in an aqueous solution was characterized via differential scanning calorimetry (DSC) and two-dimension correlation spectra (2DCOS). The rheological properties of the HPAM solution (2000 and 2500 mg L−1) were studied as a functi
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A Comprehensive Study of Hydrolyzed Polyacrylamide
HPAM does not show any electrolyte uptake regardless of any molecular weight studied, and thin films of mid- and high-molecular-weight HPAM on silicon surfaces suppress lithiation of silicon. The resulting composite electrodes exhibit an electrochemical storage capacity greater than 3000 mAh/g initially and 1639 mAh/g after 100 cycles.
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Polyacrylamide degradation and its implications
The hydrolyzed form of polyacrylamide (HPAM), a co-polymer of acrylamide and acrylic acid, is the most widely used anionic PAM in oil and gas development as well as in soil conditioning. 1,9,12,21
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Polymer Injectivity: Influence of Permeability in the Flow
The main type of polymer used is partially hydrolyzed polyacrylamide (HPAM). This polymer still has some challenges especially with shear stability and injectivity that restrict its utility
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The Behavior of Partially Hydrolyzed Polyacrylamide
This paper concerns one class of polymers that apparently is being tested widely as an additive for injection water; it is partially hydrolyzed polyacrylamide. The present investigation surveys some ways in which polymer solution properties are affected by polymer molecular weight, rock and fluid properties, polymer molecular weight, rock and fluid properties, flow rate and temperature.
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Biodegradation of Partially Hydrolyzed Polyacrylamide HPAM
In present study the biodegradation of partially hydrolyzed polyacrylamide (HPAM) by bacterial strains isolated from Omani oil fields was analyzed. HPAMs are extensively used in oil fields for enhanced oil recovery operations.
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Synthesis of partially hydrolyzed polyacrylamide
The molecular weight characterization of partially hydrolyzed polyacrylamide (HPAM) for enhanced oil recovery use is rather difficult because of its ultrahigh molecular weight copolymer and
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Influence of polymer on dynamic interfacial tensions
The influences of polymer concentration on IFT were expounded. It was found that the addition of polymer mostly results in increasing IFT because the interfacial molecular arrangement is modified owing to the interaction between polymer and surfactants.
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A Comprehensive Study of Hydrolyzed Polyacrylamide
HPAM does not show any electrolyte uptake regardless of any molecular weight studied, and thin films of mid- and high-molecular-weight HPAM on silicon surfaces suppress lithiation of silicon. The resulting composite electrodes exhibit an electrochemical storage capacity greater than 3000 mAh/g initially and 1639 mAh/g after 100 cycles.
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Comparative Study on Enhancing Oil Recovery under High
The synthetic water-soluble polymer, partially hydrolyzed polyacrylamide (HPAM), has been most widely used for enhanced oil recovery (EOR); however, its poor thermal stability and weak salt tolerance impede further application in high-temperature and high-salinity oil reservoirs.
Get PriceBiodegradation of Partially Hydrolyzed Polyacrylamide HPAM
In present study the biodegradation of partially hydrolyzed polyacrylamide (HPAM) by bacterial strains isolated from Omani oil fields was analyzed. HPAMs are extensively used in oil fields for enhanced oil recovery operations.
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Effects of salts and temperature on rheological
The hydrolyzed polyacrylamide (HPAM) is the most often used polymer in Enhanced Oil Recovery (EOR) activities. The molecular weight of HPAM has a direct relationship with the molecular size and the permeability of the porous media through the polymer will be injected.
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HPAM | SPE
Polymer injection is one of the most applications used in enhanced oil recovery. In order to achieve better sweeping efficiency, polymer is added to the injected water to increase its viscosity and ultimately minimize the viscous fingering. Partially hydrolyzed polyacrylamide (HPAM) is one of the polyacrylamide groups.
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HYDROLYZED POLYACRYLAMIDE- POLYETHYLENIMINE- DEXTRAN
Hydrolyzed Polyacrylamide- Polyethylenimine- Dextran Sulfate Polymer Gel System as a Water Shut-off Agent in Unconventional Gas Reservoirs. (May 2012) Swathika Jayakumar, B.Tech. Anna University, India Co- Chairs of Advisory Committee: Dr. Robert H. Lane Dr. Jerome Schubert
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Study on Properties of Branched Hydrophobically Modified
The effect of partially hydrolyzed polyacrylamides (HPAMs) used for polymer flooding is unsatisfactory under the conditions of high temperature and high salinity. In order to improve the viscosifying ability of HPAM, branched macromolecular skeleton monomer is used to change the linear backbone structure.
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Comparative Study on Enhancing Oil Recovery under High
The molecular weight of HPAM (1.5 × 10 7 g·mol –1) is much higher than polysaccharides (2.0 × 10 6 to 5.0 × 10 6 g·mol –1), which can cause more a significant mechanical entrapment than polysaccharides, 39 polysaccharide solutions can possess a higher effective viscosity in porous media.
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Polymer Injectivity: Influence of Permeability in the Flow
Application of polymer flooding as a chemical Enhanced Oil Recovery (EOR) has increased over recent years. The main type of polymer used is partially hydrolyzed polyacrylamide (HPAM). This polymer still has some challenges especially with shear stability and injectivity that restrict its utility, particularly for low permeability reservoirs.
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Influence of Ionic Strength on the Viscosities and Water
partially hydrolyzed polyacrylamide (HPAM). The results indicated that the presence of salts and increased salinity greatly influence the apparent and plastic viscosities and water loss of bentonite suspensions with polymer.
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Polyacrylamide Publications | PubFacts
3 Biotech 2024 Apr 4;10(4):155. Epub 2024 Mar 4. 1Department of Life Sciences, Central University of Jharkhand, Brambe, Ranchi, 835205 India. In this report, activity and stability of horseradish peroxidase (HRP) entrapped in polyacrylamide gel in the presence of proline (HEP) are compared with that of enzyme entrapped in absence of proline (HE).
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Shear and Elongational Rheology of Partially Hydrolyzed
For HPAM solutions, increasing of molecular weight dis- tribution led to a decrease in shear viscosity, and vice versa for elongational viscosity and relaxation time. In
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treatment of partially hydrolyzed polyacrylamide wastewater
Influences of partially hydrolyzed polyacrylamide (HPAM) residue on the flocculation behavior of oily wastewater produced The influences of temperature and concentration of partially hydrolyzed polyacrylamide (HPAM) residue on the treatment of simulated oily wastewater from polymer flooding were studied in this paper.
Get Price![[pdf] effect of dissolved iron and oxygen on stability](/tupian/water-90.jpg)
[PDF] Effect of Dissolved Iron and Oxygen on Stability
This paper describes an experimental study of the stability of a hydrolyzed polyacrylamide (HPAM) polymer and an HPAM-2acrylamido-tertbutylsulfonic acid (ATBS) terpolymer in the presence of varying initial levels of dissolved oxygen (0 to 8,000 ppb), Fe2þ (0 to 220 ppm), and Fe3þ (0 to 172 ppm).
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