南海北部边缘盆地与南部边缘典型盆地CO_2研究现状及进展

Present Situation and Advances of CO_2 Research in Northern Marginal Basin and Southern Typical Marginal Basin of South China Sea

南海北部边缘盆地非生物CO2资源丰富,成因类型有壳源型、壳幔混合型及火山幔源型,其中高含量壳源型和壳幔混合型成因CO2不仅集中分布于盆地中部坳陷泥底辟带浅层,而且具有平面上分区分块、纵向上分层分带分期运聚充注的复杂规律。根据勘探及研究程度,预测其CO2资源量超过万亿立方米,勘探及钻探证实的CO2地质储量近3000×108m3,居我国探明CO2地质储量之首,具有巨大的勘探潜力和综合开发利用前景。南海南部边缘曾母和万安盆地油气勘探中亦发现部分CO2气藏和含CO2油气藏,其成因类型多为非生物火山幔源型,且受控于火山幔源活动与深大断裂的输导作用,但该区目前勘探与研究程度甚低。

The northern marginal basin of South China Sea features in abundant abiogenic CO2 resources,multiple genetic types,complex migration,accumulation and reservoir-forming rules,large-scale and great potential of resources.Based on the degree of research and exploration,it is predicted that CO2 resources of the basin has surpassed one trillion cubic meters so far,as well as proven geologic CO2 reserves has closed to 300 billion cubic meters,which occupies the most of the country.The basin has great exploration potential and prospect for comprehensive development and utilization.Some CO2 gas reservoirs and CO2-containing oil-gas reservoirs have been founded in Zengmu and Wanan Basins in the southern margin of South China Sea,of which the genetic types are mainly abiogenic volcano-mantle origin.They are controlled by volcano-mantle activities and translocation of discordogenic faults.However,the two basins are under poor exploration and research now.