Journal of Ocean Engineering and Technology (한국해양공학회지)

Korean Society of Ocean Engineers (한국해양공학회)
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Investigation of Hydrate Inhibition System for Shallow Water Gas Field: Experimental Evaluation of KHI and Simulation of MEG Regeneration Process

  • Lee, Suk (Department of Architecture, Kyung Hee University) ;
  • Kim, Hyunho (Department of Naval Architecture and Ocean Engineering, Seoul National University) ;
  • Park, Ki-Heum (Department of Naval Architecture and Ocean Engineering, Seoul National University) ;
  • Seo, Yutaek (Department of Naval Architecture and Ocean Engineering, Seoul National University)
  • Received : 2020.06.30
  • Accepted : 2020.08.20
  • Published : 2020.10.30
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Abstract

In this study, a hydrate inhibition system is investigated for shallow water gas fields. Mono-ethylene glycol (MEG) injection has been used as a typical method for inhibiting hydrate formation in gas fields; therefore, most offshore platforms are equipped with MEG injection and regeneration processes. A recent application of a kinetic hydrate inhibitor (KHI) has reduced the total volume of MEG injection and hence reduce the operating cost. Experiments are designed and performed to evaluate and verify the KHI performance for inhibiting hydrate formation under shallow water conditions. However, the shut-in and restart operation may require the injection and regeneration of MEG. For this operation, the MEG concentration must be optimized while considering the cost of MEG regeneration. The obtained results suggest that decreasing MEG concentration from 80 wt% to 70 wt% can reduce the life cycle cost (LCC) of MEG regeneration process by approximately 5.98 million USD owing to reduced distillation column cost. These results suggest that the hydrate inhibition system must be evaluated through well-designed experiments and process simulations involving LCC analysis.

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References

  1. Brustad, S., Loken, K.-P., & Waalmann, J.G. (2005). Hydrate Prevention Using MEG Instead of MeOH: Impact of Eperience from Major Norwegian Developments on Technology Selection for Injection and Recovery of MEG. Offshore Technology Conference, Houston, Texas. https://doi.org/10.4043/17355-MS
  2. Kim, H., Lim, Y., Seo, Y., & Ko, M. (2017). Life Cycle Cost Analysis of MEG Regeneration Process Incorporating a Modified Slip Stream Concept. Chemical Engineering Science, 166, 181-192. https://doi.org/10.1016/j.ces.2017.03.045
  3. Kim, H., Yoo, W., Lim, Y., & Seo. Y. (2018a). Economic Evaluation of MEG Injection and Regeneration Process for Oil FPSO. Journal of Petroleum Science and Engineering, 164, 417-426. https://doi.org/10.1016/j.petrol.2018.01.071
  4. Kim, H., Veluswamy, H. P., Seo, & Y., Linga. P. (2018b). Morphology Study on the Effect of Thermodynamic Inhibitors during Methane Hydrate Formation in the Presence of NaCl. Crystal Growth & Design, 18(11), 6984-6994. https://doi.org/10.1021/acs.cgd.8b01161
  5. Kim, H., Kim, J., & Seo. Y. (2020). Economic Benefit of Methane Hydrate Reformation Management in Transport Pipeline by Reducing Thermodynamic Hydrate Inhibitor Injection. Journal of Petroleum Science and Engineering, 184, 106498. https://doi.org/10.1016/j.petrol.2019.106498
  6. Peters, M.S., Timmerhaus, K.D., West, R.E., Timmerhaus, K., & West, R. (1968). Plant Design and Economics for Chemical Engineers, 4. McGraw-Hill, New York.
  7. Park, J., Kim, H., da Silveira, K.C., Sheng, Q., Postma, A., Wood, C.D., & Seo, Y. (2019). Experimental Evaluation of RAFT-based Poly (N-isopropylacrylamide)(PNIPAM) Kinetic Hydrate Inhibitors. Fuel, 235, 1266-1274. https://doi.org/10.1016/j.fuel.2018.08.036
  8. Turton, R., Bailie, R.C., Whiting, W.B., & Shaeiwitz, J.A. (2008). Analysis, Synthesis and Design of Chemical Processes. Pearson Education.