天然气水合物开采技术研究进展

Progress in exploitation technology of methane hydrate

全球天然气水合物CH_4的含量是已探明矿物燃料总储量的2倍以上,由此,天然气水合物被认为是21世纪最具发展前景的新型能源。传统的方法如降压法,热激法和化学注剂法的实验研究已日趋完善。同时,二氧化碳置换技术正受到国内外学者的广泛关注。二氧化碳置换开采天然气水合物不仅可以避免传统开采过程中可能造成的地质灾害,还可以把二氧化碳以水合物形式封存在原甲烷水合物藏中,这对于解决能源危机和温室效应都具有很大帮助。本文主要归纳总结国内外关于天然气水合物开采方法的研究现状,同时对其实际开采应用进行展望。

The amount of CH_4 in methane hydrate is two times more than fossil fuel,so it is regard as the most prospective energy resource in 21 st century.Traditional exploitation technologies,such as depressurization,thermal injection and inhibitor injection,have been testified and improved in laboratory.As the emission of CO_2 being the most concerning environment issue,some researchers have investigated the feasibility of using CO_2 to exploit CH_4 in methane hydrate.CH_4-CO_2 replacement has the advantage of recovering CH_4 and sequestration of CO_2,meanwhile this technology will not break the stability of seafloor.This article summarize the progress of exploitation technology of methane hydrate and its development trend.