This study investigated the feasibility study on application of MEG (Mono Ethylene Glycol) regeneration unit for Oil FPSO. In order to evaluate the process adapting the MEG regeneration unit for Oil FPSO, the method of injecting MEG and MeOH of thermodynamic hydrate inhibitor, one of the field`s proven and qualified technologies, was compared each other and simulated by using ‘Aspen HYSYS’ to investigate the feasibility of the process. The required amount of hydrate inhibitor was determined depending on the condition of well and fluid for case study and CAPEX and OPEX of the process were calculated for economic analysis. ‘Aspen Economic Evaluations’ was used to have the delivered equipment cost which is the basis of CAPEX estimating for cost evaluation and OPEX was calculated based on the hydrate injection scenarios to compare the MEG injection system with MEG regeneration unit to conventional MeOH injection system. The MEG injection system with MEG regeneration unit was more economical as shut-in events are happed more frequently due to the property of MEG to be recovered by MEG regeneration unit even though the CAPEX is increased at early investment stage. Sensitive analysis was conducted to understand that how the major parameters affect the results of cost estimating. In order to have more qualified feasible study and adapt the result of this research to industrial field, the more detailed information of field development and appropriate operating philosophy and injection scenarios are needed.
본 논문에서는 심해저 유전에서 부유식 생산,저장,하역설비로의 생산과정에서 발생하는 하이드레이트의 생성을 방지하기 위하여 열역학적 억제제인 모노에틸렌글리콜(MEG) 재생공정을 적용한 주입시스템의 타당성 연구를 수행하였다. 하이드레이트 생성방지를 위해 기존의 메탄올(MeOH) 주입 방법과 모노에틸렌글리콜(MEG) 재생공정을 적용한 주입 방법을 여러 측면에서 비교하였으며, 특별히 공정 모사를 통해 시스템의 타당성을 검증하였고 다양한 운전 시나리오에 따른 경제성 분석을 통해 모노에틸렌글리콜(MEG) 재생공정을 적용한 주입시스템의 타당성을 뒷바침 하였다. 재생공정으로 인해 초기설치비용이 늘어남에도 불구하고 억제제인 모노에틸렌글리콜(MEG)의 소비비용을 현저하게 줄여서 전체 소요비용을 감소시킴으로써 경제적인 이익을 도모할 수 있는 최소의 조건을 도출하였다. 실제 현장에 적용하기 위해서는 공정의 최적화를 위한 세부적인 장비사양에 대한 정보와 실제적인 운전 시나리오가 필요하다.