摘要
深水区油气资源丰富 ,近年来深水油气勘探不断升温。在全球 6大洲 1 8个深水盆地中已发现约 580亿桶油当量的油气资源。目前 ,巴西、美国墨西哥湾的深水油气田已经投入生产 ,而且产量不断增加 ,西非地区也已进入开发阶段 ,西北欧、地中海以及亚太地区的许多国家也都在积极开展深水油气勘探或开发。海上油气钻探不断向深水区和超深水区发展 ,探井数目也在继续增加 ,投资力度不断加强 ,储量每年也有很大的增长。深水油气勘探成功率平均达到 3 0 % ,其中 ,西非的勘探成功率最高。深水区烃源岩生烃潜力较好 ,最好的烃源岩主要分布于侏罗系、白垩系和第三系的地层中 ,储层以浊积岩储层为主 ,盖层通常比较发育 ,大多数圈闭都与地层因素有关。我国南海北部陆坡深水区盆地属准被动边缘盆地 ,从烃源岩、储层、盖层、圈闭到运聚条件等都具备了形成大型油气田的基本地质条件 。
There are abundant oil and gas resources in the worldwide deepwater areas,and the exploration and production in deepwater have expanded greatly during these years.Approximately 58 Bboe total resources have been discovered in deepwater from 18 basins on the six continents.Nowadays,deepwater oil and gas resources have been brought into production in Brazil and the Gulf of Mexico of America,and the output is rising steadily.The deepwater discoveries in West Africa are at the development of planning stages.With an increasing number of exploration wells completed,and increasing capital expenditure,offshore drilling is going into deepwater and ultra deepwater,and significant reserve volume has been added each year.The global deepwater exploration success rate was about 30%,which was the highest in West Africa.In deepwater areas,the potential for source rocks is good in deepwater,and World class source rocks have been found in Jurassic,Cretaceous and Tertiary strata;most of the resources found to date are in turbidite sandstone reservoirs;adequate topseals are generally present in deepwater depositional environment;traps commonly have stratigraphic trapping components.The basin in northern continental slope in the South China Sea belongs to para passive margin basin.From source rocks,reservoirs,topseals,traps to migration and accumulation conditions,the geological conditions are favourable for oil and gas accumulation,thus it is hopeful to find oil and gas field.
出处
《海洋地质动态》
2003年第10期20-23,共4页
Marine Geology Letters
