FLNG/FLPG工程模式及其经济性评价

大型浮式液化天然气FLNG（Floating Liquid Natural Gas）船/浮式液化石油气FLPG（Floating Liquid Petroleum Gas）船是近年来海洋工程界提出的、主要用于深远海气田开发的工程装置，是集海上天然气液化、储存和装卸为一体的新型装置，具有开采周期短、开采灵活、可独立开发、可回收和可运移、无需管道输送等特点，有可能是开发我国南海深远海气田重要的工程应用模式之一。为此，以南海某深水气田作为目标气田，对比分析了传统的开发工程模式与FLNG/FLPG开发工程模式的经济性，结果表明，采用该装置开发深水天然气田可节省投资。同时还分析了不同离岸距离对投资的影响，结论认为，使用该装置对离岸距离不敏感。因此，FLNG/FLPG开发工程模式对离岸距离较远的深远海气田具有较好的经济性，是一种值得推广的深远油气田开发工程模式。

FLNG/FLPG engineering modes and their economy evaluation

Large Floating Liquefied Natural Gas (FLNG) and Floating Liquefied Petroleum Gas (FLPG) units, suggested by the ocean engineering circle, are floating facilities for LNG/LPG production, storage and offloading. These floating facilities will become an important engineering mode for the development of deep and pelagic gas fields in South China Sea due to their advantages of short recovery circle, flexible recovery method, independent development, recoverability, mobility and non pipeline transmission. Therefore, in a case study conducted in a certain deep water gas field in South China Sea, the economical efficiency is compared between the traditional development mode and the FLNG/FLPG development mode. The result shows that the latter can help save costs in developing deep water gas fields. This study also demonstrates that there is no impact of different distances away from the bank on the investment when the FLNG/FLPG is actually adopted. In conclusion, the FLNG/FLPG units are with good economic efficiency especially for the development of those deep and pelagic oil and gas fields, thus is worth applying widely in such fields.