海洋油气化探研究进展

海洋油气化探技术自20世纪50年代末以来,经过数十年的发展,在取样设备、分析测试方法及应用指标等方面,已经趋于统一与规范,形成了比较完善的技术体系,成为海洋油气风险评价的重要辅助方法。海洋油气化探研究的主要进展包括:在采样与分析方面,完善了海水嗅探器与采样管岩心采集装置,建立了以惰性气体脱气法和活性炭吸附脱气法为主的海水脱气方法,成功地研制出海底沉积物气态烃现场检测与分析装置;在应用指标方面,已从初期的以海水轻烃指标为主,发展为海水轻烃指标与海底沉积物各项指标并重的一套方法系列。在目前的海洋油气化探中,海水嗅探器测量与海底沉积物岩心分析是广泛采用的做法,两种手段相结合可为确定海上含油气远景区、识别海域油气系统特征等提供重要信息。

Advances in offshore geochemical hydrocarbon exploration

Since late 1950s,the techniques of offshore geochemical hydrocarbon exploration has trended towards unification and normalization in sampling equipment,analyzing and testing methods and applying indicators,formed a more perfect system of technology and become an important supplement to risk assessment of offshore hydrocarbon exploration.There are several major advances in offshore geochemical exploration.In sampling and analyzing,the sea-water sniffers and seabed core samplers are greatly improved,a method to desorb gas in sea water has been established on a basis of inert gas and charcoal adsorption,and a device to detect and analyze hydrocarbon gas in seabed sediments has been successfully developed.In applying indicators,a series of indicators has been set up,in which both dissolved hydrocarbon in seawater and various seabed-sediment indicators are emphasized,instead of the dominance of only dissolved hydrocarbon in the early stage of offshore geochemical exploration.Currently,the survey of seawater sniffer and the analysis of seabed-sediment core are widely used,and their combination may provide important information for determining hydrocarbon plays and indentifying petroleum systems offshore.