Tectonic Settings of Global Marine Carbonate Giant Fields and Exploration Significance
全球海相碳酸盐岩巨型油气田发育的构造环境及勘探启示

The giant fields are considered to be those with estimated ultimate recoverable hydrocarbons of equal or more than 680 million tons.On the basis of systematically surveying the status of the global giant field exploration and research,using the IHS and C&C databases and related literature on public publication,the paper analyses the 320 marine carbonate giant fields with their occurrence of 48 petroliferous basins by the end of 2009 in detail,with an emphasis on the plate tectonic setting and accumulation basin type.Plate tectonic setting includes divergent,convergent and transform,and the petroliferous basin classification of Paul Mann is used here.Research indicates that marine carbonate giant fields are formed mainly in divergent tectonic setting,including continental rifts and overlying sag,continental passive margins fronting major ocean basins.Divergent tectonic setting is favour of the forming of high quality source rocks,effective reservoir,good seal and effective assembly.The exploration inspiration is that enhancing the study of above-mentioned prototype basins in divergent tectonic setting,especially the rift at the early stage of basin evolution,which will guide our marine carbonate petroleum exploration.