| 南美玻利维亚重点盆地油气地质特征和勘探潜力评价 |
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| 引用本文： | 田纳新,姜向强,郭金瑞,曾昱昕.南美玻利维亚重点盆地油气地质特征和勘探潜力评价[J].现代地质,2018,32(2):374. |
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| 作者姓名： | 田纳新 姜向强 郭金瑞 曾昱昕 |
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| 作者单位： | (1中国石化石油勘探开发研究院，北京100083；2中国地质大学(北京) 能源学院，北京100083) |
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| 基金项目： | 国家科技重大专项(2016ZX05033-001)。 |
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| 摘 要： | 基于对玻利维亚区域构造演化与沉积充填特征的分析，研究盆地烃源岩、储集层及盖层等油气成藏地质条件的差异，分析盆地勘探潜力。玻利维亚境内发育查科、贝尼和马德雷德迪奥斯等3个重点盆地，均是在前寒武系基底基础上发育起来的叠合盆地，盆内依次充填了古生代克拉通边缘海相沉积层序、三叠纪-白垩纪裂谷期海相-海陆过渡沉积层序和晚白垩世至今前陆陆相沉积层序。油气成藏地质条件综合对比分析认为，3个盆地均发育泥盆系主力烃源岩，储集层以泥盆系-石炭系和白垩系砂岩为主，发育古生界泥岩和碳酸盐岩及古近系泥岩等多套区域盖层。成熟烃源岩主要分布在冲断带和前渊区，油气必须通过垂向和侧向运移才能聚集成藏，具有晚期生烃、晚期成藏的特点。马德雷德迪奥斯盆地前渊-斜坡带低幅构造圈闭和地层圈闭、查科盆地和贝尼盆地逆冲褶皱带构造圈闭是主要的勘探目标。
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| 关 键 词： | 查科盆地 马德雷德迪奥斯盆地 贝尼盆地 资源潜力 玻利维亚 |
Petroleum Geology and Exploration Potential of Key Basins in Bolivia |
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| TIAN Naxin,JIANG Xiangqiang,GUO Jinrui,ZENG Yuxin.Petroleum Geology and Exploration Potential of Key Basins in Bolivia[J].Geoscience——Journal of Graduate School,China University of Geosciences,2018,32(2):374. |
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| Authors: | TIAN Naxin JIANG Xiangqiang GUO Jinrui ZENG Yuxin |
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| Institution: | (1SINOPEC Petroleum Exploration & Production Research Institute, Beijing100083, China;
2School of Energy Resources, China University of Geosciences, Beijing100083, China) |
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| Abstract: | Based on the analysis of the regional tectonic evolution and sedimentary filling characteristics in Bolivia, the differences in geological conditions of hydrocarbon accumulation in the basin, such as source rocks, reservoirs and cap rock are studied, and the exploration potential of basins is analyzed. The three major basins, Chaco, Beni and Madre De Dios basins in Bolivia, are superimposed basins developed on the basis of the Precambrian basement, and the basins are sequentially filled with the marine sedimentary sequence of the Paleo generation craton margin, the Triassic Cretaceous rift marine facies marine continental transitional sedimentary sequence and foreland continental sedimentary sequence since Late Cretaceous. Comprehensive analysis of geological conditions of hydrocarbon accumulation shows Devonian main source rocks develope in 3 basins, Devonian Carboniferous and Cretaceous sandstones are reservoirs, and Paleozoic carbonate rock and Paleogene mudstone are multiple sets of caprocks. Mature source rocks are mainly distributed in the thrust belt and the foredeep region, and the oil and gas must be migrated vertically and laterally so as to accumulate, which has the characteristics of late hydrocarbon generation and late accumulation. Low amplitude structural traps and stratigraphic traps in foredeep and slope areas of Madre De Dios basin and thrust fold belt of tectonic traps in Chaco and Beni basins are the main exploration targets. |
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| Keywords: | Chaco basin Madre de Dios basin Beni basin resource potential Bolivia |
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