阿根廷库约和内乌肯盆地油气特征与勘探潜力

西南石油大学学报(自然科学版) ›› 2011, Vol. 33 ›› Issue (3): 1-7.

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阿根廷库约和内乌肯盆地油气特征与勘探潜力

童晓光¹琚亮²

1. 中国石油天然气勘探开发公司，北京东城100034；
2. 中国石油勘探开发研究院，北京海淀100083

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2011-06-20 发布日期:2011-06-20

The Petroleum Characteristics and the Exploration Potential of Cuyo Basin and Neuquen Basin, Argentina

TONG Xiao-guang¹JU Liang²

1. China National Oil and Gas Exploration and Development Corporation, Dongcheng, Beijing 100034, China;
2. Research Institute of Petroleum Exploration and Development, CNPC, Haidian, Beijing 100083, China

Received:1900-01-01 Revised:1900-01-01 Online:2011-06-20 Published:2011-06-20

摘要/Abstract

摘要：

位于阿根廷中西部地区的库约盆地和内乌肯盆地是南美次安第斯盆地群南段的两个较独特的弧后前陆盆地。俯冲角度的变化导致二者岩石圈及冲断带构造的不同。两个盆地经历了相似的4 个盆地演化阶段：基底、裂谷期、后裂谷沉降期、前陆期。库约盆地发育一个已证实的含油气系统，以上三叠统富有机质湖相泥岩为主力烃源岩，主要以三叠系河流相砂砾岩为储层，盖层为三叠系层内盖层和白垩系区域盖层，圈闭形成和油气生成高峰在新近纪。内乌肯盆地发育1 个已证实的和3 个推测的含油气系统，除裂谷期上三叠统源岩外，其余下—中侏罗统、凡兰吟阶—巴列姆阶、提塘阶—凡兰吟阶的源岩均发育在裂谷后沉降单元内，储层范围从二叠系至新生界，最富产层为上侏罗统—下白垩统砂岩和灰岩储层，油气系统关键时刻为晚白垩世—新近纪。海陆相沉积环境的不同造成烃源岩质量的巨大差异，直接体现在其成藏组合中赋存悬殊的油气资源量；各阶段中相对独立的构造–沉积环境造成了油气地质特征与勘探潜力的差异。

关键词: 油气特征, 勘探潜力, 弧后前陆盆地, 库约盆地, 内乌肯盆地, 阿根廷, 南美

Abstract: Located in west-central Argentina, the Cuyo and Neuquen basin are typical Sub-Andean back-arc foreland basins. The differing deformation styles of the lithosphere and fold and thrust belt may be a response to the angle of plate subduction. There are 4 similar basin evolution stages: Basement, Syn-rift, Post-rift and Foreland. A single petroleum system is recognized in Cuyo basin, comprising Triassic organic-rich lacustrine mudstones, Triassic-Jurassic reservoirs and Triassic intraformational as well as Cretaceous regional seals; Traps formed during the Neogene at a similar time to peak oil generation. Three hypothetical and one known petroleum systems occur in Neuquen basin, related to the Upper Triassic, Lower-Middle Jurassic, Valanginian- Barremian and Tithonian-Valanginian source rocks, respectively. Oil and gas has accumulated in reservoir rocks that range in age from Permian to Tertiary, most commercial hydrocarbons are produced from Jurassic and Cretaceous reservoirs. All systems reached the critical moment during the Late Cretaceous-Late Tertiary. The different depositional setting caused different source rock quality. The diversity of their petroleum geological characteristics and the exploration potential are controlled by respective tectonic sedimentary process.

Key words:

petroleum characteristics, exploration potential, back-arc foreland basin, Cuyo Basin, Neuquen Basin, Argentina, South America

中图分类号:

TE121.1

童晓光琚亮. 阿根廷库约和内乌肯盆地油气特征与勘探潜力[J]. 西南石油大学学报(自然科学版), 2011, 33(3): 1-7.

TONG Xiao-guang JU Liang.

The Petroleum Characteristics and the Exploration Potential of Cuyo Basin and Neuquen Basin, Argentina[J]. 西南石油大学学报(自然科学版), 2011, 33(3): 1-7.

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阿根廷库约和内乌肯盆地油气特征与勘探潜力

The Petroleum Characteristics and the Exploration Potential of Cuyo Basin and Neuquen Basin, Argentina

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