南美洲前陆盆地油气分布与勘探前景  

PETROLEUM DISTRIBUTION AND EXPLORATION PROSPECTS OF THE FORELAND BASINS IN SOUTH AMERICA

作　　者：赵明章[1,2] 于淼 徐九华[1] 王仁冲 史立勇[3] 高军 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]中国石油天然气勘探开发公司,北京100034 [3]中国石油勘探开发研究院,北京100083 [4]东方地球物理勘探公司,河北涿州072750

出　　处：《大庆石油地质与开发》2013年第6期36-41,共6页Petroleum Geology & Oilfield Development in Daqing

基　　金：中国石油天然气集团公司科技攻关项目(06B80102)

摘　　要：南美洲前陆盆地的演化经历了克拉通边缘盆地、裂谷盆地和前陆盆地3个阶段。前陆盆地的演化过程不仅控制盆地烃源岩、储层和盖层的发育类型和程度，而且影响了次安第斯前陆盆地的油气分布规律。平面上，南部以油为主，中部以气为主，北部油气并重；垂向上，新生界以油为主，中生界油气并举，古生界以气为主；油气自南向北富集程度越来越高。通过分析南美洲前陆盆地演化、油气地质条件和油气分布规律，指出了北部富油、中部含气前陆盆地的风险勘探区和富油前陆盆地的有利勘探区。The evolution of the foreland basins in South America can be summarized as the following three stages： pericratonic basin, rift basin and foreland basin. The evolutional process of the foreland basin not only controls the developed types and degree of the source rocks, reservoirs and caprocks in the basin, but also influences the petro- leum distribution laws in the sub-Andes foreland basins. In horizontal, the south is mainly distributed by the oil, the middle is enriched with the gas, and the north is accumulated with both the oil and gas; in vertical, the oil is principally enriched in Cenozoic group; the oil and gas is both entrapped in Mesozoic group, and the gas is mainly accumulated in Paleozoic group ; the enriched degree of the petroleum from the south to north is more and more fa- vorite. Through the analyses of the evolution, geological conditions and the distribution laws of the hydrocarbon for the foreland basins in South America, the risk exploration areas are put forward for the north oil-accumulated and middle gas-bearing foreland basins, and moreover the favorable explorational regions or plays are presented fbr the oil-enriched foreland basins.

关 键 词：南美洲 次安第斯前陆盆地 盆地原型 石油地质特征 有利勘探区 

分 类 号：TE121[石油与天然气工程—油气勘探]