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Modeling of Asphaltene Transport and Deposition under the Effect of Flow Regime in Production oil well

Rahnama Esfahani, Masoud | 2019

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 51708 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Taghikhani, Vahid; Ayatollahi, Shahab
  7. Abstract:
  8. Asphaltene deposition, considered as the heaviest and the most polarizable fraction of crude oil, can cause severe problems in oil production and extraction systems. Oil production companies annually bear huge reduction or even cessation in production and, in turn, costs due to asphaltene precipitation and deposition in wellbore or production tubings. To gain more and better insight into asphaltene formation in production systems, the conceptual investigation on the mechanisms of asphaltene adsorption and deposition on a solid surface is indispensable. In this study Asphaltene's particle adsorption and deposition onto the metal surface under the effect of flow is investigated by experimental modeling of the production oil well. This model contains quartz crystal microbalance metal sensor and novel designed flow cell, which represents the experimental model of the wellbore and oil flow respectively. Several experiments using model oil performed and Asphaltene adsorption model onto the surface is studied. Effects of Asphaltene concentration, flow rate, solution aging and types of model oil on adsorption and desorption of Asphaltene particle is probed.Our studies show that Asphaltene adsorption onto surface increases as flow rate and Asphaltene concentration increases. Asphaltene adsorption onto metal surface follows Langmuir type which is monolayer adsorption. In early times the Asphaltene adsorption process is controlled by kinetics and then follows the diffusion process. Solution aging decreases Asphaltene adsorption but Asphaltene aggregation decreases adsorption and deposition
  9. Keywords:
  10. Experimental Modeling ; Asphaltene Deposition ; Quartz Crystal Microbalance (QCM)Experiments ; Flow Assurance ; Flow Regime

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