二氧化碳埋存技术在我国海上气田的应用与思考

Application of CO_2 storage technology in China offshore gasfields and its rethinking

海上有些气田天然气中富含二氧化碳,在开采天然气的同时会分离出大量的二氧化碳,当分离的二氧化碳不能或不能全部用于工业用途时,需要对二氧化碳进行处置,避免大气污染。从二氧化碳深部咸水层地质封存机制入手,结合挪威北海Sleipner气田二氧化碳地质埋存成功实例,对我国海上气田产出的二氧化碳开展地质埋存数值模拟研究。研究结果表明:海上气田开采时产出的二氧化碳,通过分离后回注到深部成水层的埋存方式,可以达到二氧化碳永久埋存的目的。

Due to the abundant composition of CO2 in some oftshore gasfields, a mass of C02 will be generated in the process of natural gas exploitation. If these CO2 can＇ t be wholly used for industry purpose, necessary actions should be taken to deal with CO2. in order to prevent air pollution. Based on geological storage principle of CO2 in deep salt water layer and combined with the successful project of CO2 storage in Sleipner gasfield of North sea in Norway, this paper made numeric simulation research on the geological storage of the CO2 separated from China offshore gasfields. The results showed that the method that rein jetted CO2 （generated in exploitation process） into deep salt water layer after separation could achieve the purtose of eternal storage of CO2.