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Design and Manufacture of Polymeric Nanocomposite in Order to Control the Production and Migration of Sand in Reservoirs

Saghandali, Farzin | 2023

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  1. Type of Document: Ph.D. Dissertation
  2. Language: Farsi
  3. Document No: 56543 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Taghikhani, Vahid; Baghban Salehi, Mahsa
  7. Abstract:
  8. Sand production from oil reservoirs leads to various problems, such as well productivity reduction, operating equipment corrosion, and increased production costs. Therefore, controlling sand production in unconsolidated reservoirs is crucial for operating companies. Chemical injection into the formation in order to strengthen and reduce sand production is one of the most important methods of sand control. In this study, a hydrogel nanocomposite was designed and its effectiveness in sand control was investigated. Various tests were carried out to define and assess its efficacy, as follows: Morphological tests demonstrated the creation of a dense, homogeneous, and porous structure. Structural analysis confirmed the formation of a three-dimensional structure and the homogeneous dispersion of nanoparticles. Thermal gravimetric tests showed that adding nanoparticles increased the thermal stability from 80°C to over 200°C. Rheological tests examined the material's behavior under different strains and stresses; they confirmed the preservation of the strong structure and linear viscoelastic behavior at a temperature of 90°C. The results of compressive strength and turbidity tests under ambient conditions indicated a 970% increase in compressive strength and a 70% reduction in turbidity after injecting 0.5 PV of an optimized nanocomposite suspension. Chemical flooding tests confirmed a 95% reduction in sand production, and turbidity tests under reservoir conditions showed a 56% reduction in turbidity after nanocomposite injection into the sand pack. Considering the stability and proper efficiency in the reservoir's harsh conditions, having linear viscoelastic properties, increasing compressive strength, and reducing sand production, the hydrogel nanocomposite designed in this research is proposed as a new and optimal product to control sand production and migration
  9. Keywords:
  10. Polymer Nanocomposits ; Hydrogel ; Hydrogel Nanocomposite ; Sand Production ; Linear Viscoelastic ; Chemical Flooding ; Pressure Strength

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