Publications

INPEX Masela, Ltd (INPEX) plans to develop the Abadi gas field located within the Masela Block in the Arafura Sea with a Floating Liquefied Natural Gas (FLNG) facility and deep water subsea production systems. There are several gas hydrate prevention methodologies for such deep water subsea developments. Continuous Mono-Ethylene Glycol (MEG) injection can be considered as one of the most robust technology but it may be burden from topside weight viewpoints. Insulation and blowdown strategy can be considered as alternate means because of its simplicity. However, this strategy requires large amount of subsea dynamic studies to confirm its feasibility. Objective of this paper is to describe its feasibility analysis of insulation and blowdown with some specific aspects which FLNG can have. Since FLNG has LNG inventory in the tanks, it is possible to utilize vaporized LNG to increase robustness of insulation and blowdown by circulating vaporized LNG with MEG to prevent this hydrate formation risk when subsea system is pressured for (re)-start up. A dynamic simulation model was developed using a fluid dynamic simulator, OLGA to assess its feasibility.