System evaluation of offshore platforms with gas liquefaction processes

Tuong-Van Nguyen*, Silvio de Oliveira Júnior

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

Abstract Floating, production, storage and offloading plants are facilities used for offshore processing of hydrocarbons in remote locations. At present, the produced gas is injected back into the reservoir instead of being exported. The implementation of refrigeration processes offshore for liquefying natural gas provides the opportunity to monetize offshore gas resources. The present work analyzes the performance of offshore platforms, from the oil processing to the gas liquefaction system. Different feed compositions, system layouts and liquefaction processes are considered. Potential system improvements are discussed based on an energy and exergy analysis. Compared to a standard platform where gas is directly injected into the reservoir, the total power consumption increases by up to 50%, and the exergy destruction within the processing plant doubles when a liquefaction system is installed. It is therefore essential to conduct a careful analysis of the trade-off between the capital costs and operating revenues for such options.
Original languageEnglish
JournalEnergy
Volume144
Pages (from-to)594–606
ISSN0360-5442
DOIs
Publication statusPublished - 2018

Keywords

  • Gas liquefaction
  • Offshore platforms
  • Thermodynamic analysis
  • Process integration

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