巴西海上坎波斯与桑托斯盆地油气成藏特征对比研究  

Petroleum accumulation characteristics in Campos and Santos Basins,offshore Brazil

作　　者：熊利平[1] 邬长武[1] 郭永强[1] 李嵩阳[2] 

机构地区：[1]中国石油化工股份有限公司石油勘探开发研究院,北京100083 [2]北京邮电大学,北京100876

出　　处：《石油实验地质》2013年第4期419-425,共7页Petroleum Geology & Experiment

基　　金：中国石化科技部项目"巴西重点盆地油气资源潜力及选区评价"(P11063)

摘　　要：坎波斯与桑托斯盆地油气资源非常丰富。2个盆地均经历了裂谷、过渡、被动大陆边缘3个构造阶段,发育盐下陆相层序、盐岩层序、盐上海相层序,形成盐下、盐上2套成藏组合。由于盆地构造格架不同,导致盐岩分布、盐下储层发育程度的差异,加之盐上储层分布的不同,造成2个盆地油气分布特征的巨大差异。桑托斯盆地油气主要分布在外部高地带的盐下领域,而坎波斯盆地油气主要富集在中部低凸带的盐上储层中。通过分析2个盆地的构造演化及地层发育特征、成藏条件及主控因素,优选了盐下、盐上成藏组合的有利区,剖析了2个盆地成藏条件的异同,可指导我国石油公司在这2个盆地新项目评价和在执行区块的勘探部署。The Campos and Santos Basins are rich in petroleum. Both of the 2 basins have experienced 3 phases of tectonic evolution （ rift, transition and passive continental margin） , depositing 3 corresponding sedimentary mega-sequences （pre-salt continental sequence, salt sequence and post-salt marine sequence）, and forming 2 plays （pre-sah play and post-salt play）. Due to different tectonic frameworks, salt distribution and pre-sah reservoir development patterns are dift^rent in the 2 basins. Combining with different post-salt reservoir distribution, obvious difference exists in petroleum distribution between the 2 basins. Petroleum in the Santos Basin mainly distributes in pre-salt sequences of the outer basement plateau while petroleum in the Campos Basin accumulates in post-sah reservoirs of the central low uplift. Based on the analyses of tectonic evolution, sedimentation characteristics and major controlling factors, the thvorable exploration zones for pre- and post-salt reservoirs are defined. The differences of accumulation condition between the 2 basins are discussed. The studies may provide Chinese companies a guide for new business development and executing blocks＇ exploration activities in the 2 basins.

关 键 词：盐膏岩 成藏主控因素 油气成藏 坎波斯盆地 桑托斯盆地 

分 类 号：TE122.3[石油与天然气工程—油气勘探]