阿根廷内乌肯盆地演化及其石油地质特征

阿根廷内乌肯盆地沉积构造演化可分为同裂谷期（晚三叠世-早侏罗世）、后裂谷期（早侏罗世-早白垩世）和前陆期（晚白垩世-新生代）等3 个阶段。同裂谷期主要发育河流相、湖泊相和火山碎屑沉积物;后裂谷期发育2 个较大的海进-海退旋回,下部旋回以湖相、海相沉积为主,上部旋回主要发育河流三角洲相沉积;前陆期以压性机制为主,发育了海相、陆相沉积。盆地油气资源丰富,其中,最主要烃源岩位于Vaca Muerta 组;主要产层是晚侏罗世和早白垩世砂岩和灰岩;侏罗系及其以下盖层多为区域性的,其上盖层多为半区域性的。盆地内石油主要分布于盆地周边,天然气集中于盆地中心,以构造-地层复合型油气藏为主。盆地西部逆掩带以及盆地东部周缘重油分布带是有利勘探区域。

Evolution and Petroleum Geologic Characteristics of Neuquen Basin in Argentina

Sedimentary and tectonic evolution of the Neuquen basin is divided into three stages: the syn-rift stage(Late Triassic-Early Jurassic),depositional systems of fluvial,lacustrine and pyroclastics are developed;the post-rift stage(Early Jurassic-Early Cretaceous),two large transgression and regression cycles are developed,marine and lacustrine sediments occur in bottom cycle,while fluvial delta sediment in upper cycle;and foreland one(Late Cretaceous-Cenozoic),dominated by compressional mechanism,marine and c...