1. Proceedings
  2. I3M
  3. 2020
  4. MAS
  5. 10.46354/i3m.2020.mas.006

An experimental and modeling approach to estimate the minimum miscibility pressure of nitrogen-crude oil using dead oil samples

  • a Ahmad S. Y. Suleiman , 
  • b Ali Al Bemani , 
  • c G. Reza Vakili-Nezhaad 
  • a,b,c Sultan Qaboos University, P.O. Box 50, Muscat, Postcode 123, Sultanate of Oman
Cite as
Suleiman A. S. Y. , Al Bemani A., Vakili-Nezhaad G.R. (2020). An experimental and modeling approach to estimate the minimum miscibility pressure of nitrogen-crude oil using dead oil samples. Proceedings of the 19th International Conference on Modeling & Applied Simulation (MAS 2020), pp. 44-51. DOI: https://doi.org/10.46354/i3m.2020.mas.006

Abstract

The Vanishing Interfacial Tension (VIT) technique is used to determine the Minimum Miscibility Pressure (MMP) of 5 dead crude oil samples using pure Nitrogen as injected gas. This technique is used to measure the Interfacial Tension for each oil sample in Nitrogen. NMMP can be estimated when there is no interface between oil and gas. As the experimental NMMPs are based on dead oil samples, and due to the risk involved with live oil, a new approach is introduced by using existing 30 experimental data sets available in the literature. The new correlation (SQU-NMMP model) is generated based on 20 data sets. The other 10 data sets were used to validate the SQU-NMMP model and other correlation models. The average error of SQU-NMMP model is 2.4% compared with 4.3% for Sebastian & Lawrence’s model. Normalization is applied on each sample’s fraction to convert it into dead condition. The coefficient is the ratio of MMPDead to NMMPLive. The standard deviation of the calculated coefficients is 0.2 with an average of 1.33. The NMMP of the 5 dead oil samples are estimated by the VIT experiment as well as by using the CMG WinProb software and then results are compared with each other resulting in an average error of 3.2%. The study proved the SQU-NMMP model works precisely with less error margin.

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