Evaluation of rheological properties of a novel thermo-viscosifying functional polymer for enhanced oil recovery

Sarsenbekuly, Bauyrzhan; Kang, Wanli; Yang, Hongbin; Zhao, Bo; Aidarova, Saule; Yu, Bin; Issakhov, Miras

doi:10.1016/j.colsurfa.2017.04.053

Cited by 38 publications

(23 citation statements)

References 31 publications

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“…This behavior can be related to the insertion of the grafts, which decreases the charge density of the main chain, reducing electrostatic repulsions and resulting in a contraction of the chains, in other words, there is an increase in intramolecular interactions, as indicated by UV–Vis . The contraction of the chains results in a reduced hydrodynamic volume and, consequently a lower viscosity . HPAM‐ g ‐PEOPPO2 (GP% = 2.4%) exhibited the lowest viscosity curve profile, due to the higher GP%, which leads to the more pronounced decrease in the main chain charges and greater intramolecular interactions …”

Section: Resultsmentioning

confidence: 99%

“…Partially hydrolyzed polyacrylamide (HPAM) is a water‐soluble polymer widely employed in many areas of industry, such as water treatment, drilling fluids, and enhanced oil recovery (EOR) . In particular, HPAM is the most applied polymer in EOR to increase the viscosity of the water, improving the oil displacement efficiency . However, due to the charges in the chain (COO − groups), this polymer is extremely sensitive to high ionic strength of the reservoir, which can cause phase separation followed by precipitation .…”

Section: Introductionmentioning

confidence: 99%

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HPAM‐g‐PEOPPO: Rheological modifiers in aqueous media of high temperature and high ionic strength

Lima

Marques

Villetti

et al. 2019

J of Applied Polymer Sci

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Partially hydrolyzed polyacrylamide (HPAM) is widely used as thickener in enhanced oil recovery (EOR), but the high temperature and salinity of oil reservoirs can reduce the viscosity and lead to polymer precipitation. To improve the performance of HPAM in high‐salinity and high‐temperature environments, the responsive amino‐terminated poly(ethylene oxide‐co‐propylene oxide) (PEOPPO) (EO/PO = 19/03) was grafted onto a HPAM backbone. The copolymers were prepared in water using 1‐ethyl‐3‐[3‐(dimethylamino)‐propyl]carbodiimide hydrochloride/N‐hydroxysuccinimide (EDC/NHS) as activators. Structural characterization was performed by 1H NMR and Fourier transform infrared (FTIR) and the responsive behavior was investigated by UV–Vis and rheology. Spectroscopic analyses confirmed that copolymers were successfully synthesized. UV–Vis showed that copolymers have combined salt and thermoresponsive character. Rheology in saline medium (ionic strength = 3.75 mol.L−1) revealed that, contrary to unmodified HPAM, HPAM‐g‐PEOPPO have thermothickening behavior and also higher viscosity than HPAM at 70 °C, suggesting the utilization of these copolymers as rheological modifiers under harsh conditions of temperature and salinity, such as the ones found in EOR applications. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47453.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

HPAM‐g‐PEOPPO: Rheological modifiers in aqueous media of high temperature and high ionic strength

Lima

Marques

Villetti

et al. 2019

J of Applied Polymer Sci

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“…PMMS55 terpolymer had the ability to form hydrogen bonds through its amide side groups, while its styrene groups also induced hydrophobicity. These two properties together created strong polymer–polymer interactions depending on the temperature like a thermoviscosifying polymers, recently reported for the polymer EOR process . At low temperatures, the polymer–polymer interactions were dominant, leading to the structural transformation of the coil‐globule and AM‐ST‐MA chains formed a random coil structure when the polymer–solvent interactions were stronger than the polymer–polymer ones at high temperatures .…”

Section: Resultsmentioning

confidence: 71%

Inverse emulsion polymerization of triple monomers of acrylamide, maleic anhydride, and styrene to achieve highly hydrophilic–hydrophobic modified polyacrylamide

Lalehgani

Ramazani

Tamsilian

et al. 2019

J of Applied Polymer Sci

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The purpose of this study was the production of copolymers and terpolymers with highly hydrophilic-hydrophobic properties, using inexpensive and available monomers as potential enhancing oil recovery (EOR) and water production control agents for high-temperature and high-salinity (HTHS) oil reservoirs. For this purpose, several copolymers and terpolymers with different molar percentage of acrylamide/styrene, acrylamide/maleic anhydride, and acrylamide/styrene/maleic anhydride were synthesized by the inverse emulsion polymerization technique. The presence of hydrophobic styrene and hydrophilic maleic anhydride monomers in the copolymer and terpolymer structure, provided some unique properties compared to polyacrylamide, was confirmed by several analyses including HNMR, elemental analysis, FTIR, SEM, TGA, and DSC. Simulating HTHS oil reservoir condition under high salinity, temperature, and shear rate, the rheological studies suggested unlike traditional EOR agents such as polyacrylamide, the viscosity of the copolymer, and terpolymer aqueous solutions showed a considerable increase after a critical polymer concentration and less reduction with the salt increment at both ambient and elevated temperatures. Furthermore, the swelling ratio of the insoluble terpolymers measured versus the time and temperature in salt water increased with the maleic anhydride mole fraction, decreased with the salt concentration, and showed a maximum value at around 57 C.

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“…Table 1 shows the summary of the main scientific developments in this area and the evolution of the studies. Sarsenbekuly et al, 2017b;Su and Feng, 2018;Zhu et al, 2013). These structures behave like water-soluble macromolecules at room temperature, but above the critical association temperature (T ass ) or LCST, the thermosensitive sequences are reversibly self-aggregated by the formation of physical interactions, forming hydrophobic microdomains that increase the viscosity of the polymeric solution (Kamal and Sultan, 2017;Kamal et al, 2015a;Li et al, 2017;Wang et al, 2010).…”

Section: Hydrophobically Modified Associative Polymers (Hmaps)mentioning

confidence: 99%

Polymer viscosifier systems with potential application for enhanced oil recovery: a review

Aguiar

Palermo

Mansur

2021

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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Due to the growing demand for oil and the large number of mature oil fields, Enhanced Oil Recovery (EOR) techniques are increasingly used to increase the oil recovery factor. Among the chemical methods, the use of polymers stands out to increase the viscosity of the injection fluid and harmonize the advance of this fluid in the reservoir to provide greater sweep efficiency. Synthetic polymers based on acrylamide are widely used for EOR, with Partially Hydrolyzed Polyacrylamide (PHPA) being used the most. However, this polymer has low stability under harsh reservoir conditions (High Temperature and Salinity – HTHS). In order to improve the sweep efficiency of polymeric fluids under these conditions, Hydrophobically Modified Associative Polymers (HMAPs) and Thermo-Viscosifying Polymers (TVPs) are being developed. HMAPs contain small amounts of hydrophobic groups in their water-soluble polymeric chains, and above the Critical Association Concentration (CAC), form hydrophobic microdomains that increase the viscosity of the polymer solution. TVPs contain blocks or thermosensitive grafts that self-assemble and form microdomains, substantially increasing the solution’s viscosity. The performance of these systems is strongly influenced by the chemical group inserted in their structures, polymer concentration, salinity and temperature, among other factors. Furthermore, the application of nanoparticles is being investigated to improve the performance of injection polymers applied in EOR. In general, these systems have excellent thermal stability and salinity tolerance along with high viscosity, and therefore increase the oil recovery factor. Thus, these systems can be considered promising agents for enhanced oil recovery applications under harsh conditions, such as high salinity and temperature. Moreover, stands out the use of genetic programming and artificial intelligence to estimate important parameters for reservoir engineering, process improvement, and optimize polymer flooding in enhanced oil recovery.

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Evaluation of rheological properties of a novel thermo-viscosifying functional polymer for enhanced oil recovery

Cited by 38 publications

References 31 publications

HPAM‐g‐PEOPPO: Rheological modifiers in aqueous media of high temperature and high ionic strength

HPAM‐g‐PEOPPO: Rheological modifiers in aqueous media of high temperature and high ionic strength

Inverse emulsion polymerization of triple monomers of acrylamide, maleic anhydride, and styrene to achieve highly hydrophilic–hydrophobic modified polyacrylamide

Polymer viscosifier systems with potential application for enhanced oil recovery: a review

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