玛德莱德迪奥斯盆地泥盆系烃源岩新认识

前人研究认为玛德莱德迪奥斯盆地上泥盆统是“世界级”的烃源岩。通过对比玛德莱德迪奥斯盆地上泥盆统Cabanillas群和 Tomachi组烃源岩在有机质类型、有机质丰度和生烃潜力等方面的差异，证明二者不是同一套烃源岩。并通过层序地层学分析认为Cabanillas群是Tomachi组的上覆地层。因此，玛德莱德迪奥斯盆地上泥盆统不是“世界级”的烃源岩。同时，通过对Cabanillas群烃源岩演化特征研究以及综合地质分析认为，Cabanillas群烃源岩以生气为主，盆地的主要资源类型以天然气为主，勘探效益较低。

New Understanding of Devonian Source Rocks in Madre de Dios Basin in Peru

It was believed from previous studies that the Upper Devonian in Madre de Dios basin was the“world class”source rocks. This paper compares the source rocks from Upper Devonian Cabanillas group (Peru) and Tomachi formation (Bolivia) in differences of the type and the abundance of organic matter and the hydrocarbon potentials, and proves that the two are not the same set of source rocks. According to sequence stratigraphy analysis, it is believed that Cabanillas group is overlying the Tomachi formation. Therefore, the Upper Devonian in Madre de Dios basin is not a world?class source rocks. Meanwhile, based on the geochemical characteristics of Cabanillas group and geological analysis, the Cabanillas source rocks mainly generate gas. The main resource type of this basin is gas, and the benefit for exploration of it will be lower