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Investigation on Effects of Nanoparticles Presence on Hydrate Formation Characterization During Drilling

Jalilolghadr Ardabili, Raouf | 2017

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  1. Type of Document: M.Sc. Thesis
  2. Language: English
  3. Document No: 49415 (66)
  4. University: Sharif University of Technology, International Campus, Kish Island
  5. Department: Science and Engineering
  6. Advisor(s): Mohammadi, Ali Asghar; Zarenezhad, Bahman; Ramazani, Ahmad
  7. Abstract:
  8. In past two decades, the direction of oil and gas exploration has moved towards deep water drilling. The pressure and temperature in these zones are ideal for gas hydrate formation that can cause serious and sometimes uncontrollable issues during drilling operations. Gas hydrate formation while drilling can cause problems such as occurrence of kick and blowout, plug chock and kill line, and change in rheology of drilling mud. On the other hand, nowadays, nanotechnology has created an evolution in engineering sciences and because of the wide range of this science, drilling industry is affected like other industries. In the meantime, because of high yield, high stability and various methods of application, using nanotechnology in improving the characteristics of drilling fluid, has been one of the most important studying aspects by researchers. Using nanoparticles in drilling fluid has helped the researchers in quickly correcting the drilling fluid characteristics by changing the combination, amount and distribution of nanoparticles. In this study, the effect of silica nanoparticles presence in aqueous solution on gas hydrate formation was investigated. These experiments were conducted at initial pressure of 50bar and temperature of 274.65K while the stirrer speed had been set on 600rpm. Our results showed that the silica nanoparticles act at concentrations below 4000ppm as promoter and at concentrations of 4000 ppm and above as a kinetic inhibitor. The best concentration from view of inhibition behavior was observed at concentration of 10000ppm so that the induction time was increased 54.89% in comparison with pure water at this concentration. Interesting results were obtained by analyzing other parameters. Such that, if gas hydrate was formed during drilling, the presence of silica nanoparticles at concentrations of 3000ppm and above can improve well control conditions compared to when the nanoparticle is not present. It seems that the concentration of 6000ppm, among of the tested concentrations, can create the best conditions in viewpoint of well control
  9. Keywords:
  10. Silica Nanoparticles ; Drilling Fluid ; Gas Hydrate ; Nanotechnology ; Drilling Operation

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