巴西桑托斯盆地含油气系统划分与评价  

Division and Evaluation of Petroleum Systems in the Santos Basin, Brazil

作　　者：邓超[1] 白国平[1] 仲米虹[2] 邹建红[3] 刘君兰 张明辉[1] 

机构地区：[1]中国石油大学油气资源与探测国家重点实验室 [2]中海石油气电集团有限责任公司技术研发中心 [3]中国石油冀东油田公司南堡油田 [4]中国石油华北油田公司勘探开发研究院

出　　处：《海相油气地质》2014年第3期35-42,共8页Marine Origin Petroleum Geology

基　　金：国家科技重大专项"大型油气田及煤层气开发"之"海相碳酸盐岩层系大中型油气田分布规律及勘探评价"课题(项目编号:2011ZX05005-001-010HZ)资助

摘　　要：巴西桑托斯盆地深水区白垩系—新生界的油气绝大部分分布于圣保罗高地,其次分布于盆地陆坡坳陷区。盆地的下白垩统区域性蒸发岩盖层为盐下油气藏的形成提供了保证。根据盆地的构造格局以及烃源岩、储集层和油气分布的特征,划分出两个含油气系统:下白垩统含油气系统和上白垩统含油气系统,下白垩统含油气系统还可划分为盐下和盐上两个成藏组合。划定了含油气系统在盆地中的分布范围。认为圣保罗高地下白垩统盐下Guaratiba群湖相碳酸盐岩层系最有勘探潜力,盆地北部和中部的上白垩统土伦阶Ilhabela段浊积岩和新生界Marambaia组内浊积岩储层具有较大的勘探潜力,西南部下白垩统盐上Guaruja组海相碳酸盐岩储层亦有一定的勘探潜力。Most of the Cretaceous and Cenozoic deep-water oil and gas fields are distributed in Sao Paulo High, and others in depressions in the slope, Santos Basin. The development of regional Lower Cretaceous evaporite seal ensures the entrapment of hydrocarbon in the sub-salt sequence. Based on studies on the structural framework of the basin and the features of source rocks, reservoirs and hydrocarbon distribution, the Santos Basin is divided into two petroleum systems, the Lower Cretaceous one and the Upper Cretaceous one. The Lower Cretaceous petroleum system can be further divided into the post-salt and pre-salt plays. Subsequently the extent of petroleum systems is delimited. It is suggested that the pre-salt lacustrine carbonate rock in Lower Cretaceous Guaratiba Group on the Sao Paulo High is of the greatest exploration potential. The turbidite of Turonian Ilhabela Member and the turbidite within Cenozoic Marambaia Formation in the northern and central parts of the basin rank the second, and the marine carbonate rock of Lower Cretaceous Guaruja Formation in the southwestern part of the basin is also a certain exploration potential.

关 键 词：桑托斯盆地 白垩系 含油气系统 油气成藏 油气分布规律 油气勘探潜力 

分 类 号：TE122.34[石油与天然气工程—油气勘探]