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Hydrogel nanocomposite network elasticity parameters as a function of swelling ratio: from micro to macro flooding

Saghandali, F ; Sharif University of Technology | 2023

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  1. Type of Document: Article
  2. DOI: 10.1016/j.jiec.2023.05.025
  3. Publisher: Korean Society of Industrial Engineering Chemistry , 2023
  4. Abstract:
  5. Gel flooding is one of the most important cEOR methods. In this study, a Co[AM-AMPS-MA-AAC]/PEI-MBA nanocomposite, using zirconium or zinc nanoparticles, was synthesized to improve the performance of traditional hydrogels. FTIR and XRD tests confirmed the three-dimensional structure and homogeneous distribution of nanoparticles. The SEM and ESEM images revealed a homogeneous and 3D structure with an average pore size of 35 nm. The sweep strain test showed that the maximum storage moduli of Zr and Zn nanocomposites are 21,300 and 7700 Pa, respectively. The frequency sweep test showed linear viscoelastic behavior at various frequencies. According to TGA results, less than 1% of the nanocomposites degraded at reservoir temperatures. Network parameter calculations revealed the average pore size for Zr and Zn nanocomposites was 35 and 27 nm, respectively, showing high agreement with ESEM. The micromodel test showed a 22% increase in oil recovery, and the core-flooding test showed that Zr-nanocomposite caused a 98% decrease in water production and lowered the relative permeability of water by 37 times that of oil's relative permeability reduction. According to the research results, the synthesized nanocomposites have good structural and thermal strength, increase oil recovery, and decrease water production, making them a promising candidate for EOR processes. © 2023 The Korean Society of Industrial and Engineering Chemistry
  6. Keywords:
  7. Core flooding ; EOR ; Hydrogel ; Micromodel ; Nanocomposite ; Network parameter ; Rheology
  8. Source: Journal of Industrial and Engineering Chemistry ; Volume 125 , 2023 , Pages 163-177 ; 1226086X (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S1226086X23002964