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南美地区油气地质特征及常规油气资源潜力

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在分析南美油气地质特征的基础上,进行南美主要含油气盆地待发现常规油气资源评价,总结待发现油气资源分布规律,探讨其勘探前景.结果表明,受4大板块碰撞影响,南美沉积盆地可分成弧前、弧后、前陆、内克拉通和被动陆缘盆地5种类型.南美油气成藏条件优越,烃源岩以中新生界海相-陆相泥岩为主,生烃潜力大.储层以白垩系和第三系碎屑岩和碳酸盐岩为主,分布广泛.盖层中新生界区域性泥岩和盐岩为主,封堵能力强.采用以成藏组合为基础评价单元的资源评价方法,将南美65个盆地共划分出152个成藏组合,并进行了资源评价.预测南美65个主要含油气盆地的待发现石油可采资源量为263 716 MMB,待发现凝析油可采资源量为7 405 MMB,待发现天然气可采资源量为559 020 BCF.待发现油气资源在平面上呈"两带"展布、"两中心"富集特征;在纵向上主要富集于白垩系和第三系.被动陆缘盆地和前陆盆地是南美未来油气勘探的两个重点领域,其中深海和前陆冲断带是主要勘探方向,巴西、委内瑞拉是重点关注国家.
Petroleum Geology and Resource Potential of Conventional Oil and Gas in South America
Based on the analysis of petroleum geological features in South America,the undiscovered recoverable resources of conventional oil and gas in major basins of South America were evaluated,and the distribution characteristics of undiscovered oil and gas resources and the exploration potential were discussed.The results show that the sedimentary basins in South America can be divided into five types:forearc basin,back-arc basin,foreland basin,inner craton basin and passive margin basin.The source rocks are mainly Mesozoic and Cenozoic marine shales with very high hydrocarbon generation potential.The oil and gas reservoirs are mainly Cretaceous and Tertiary clastic rocks and carbonate rocks with wide distribution.The seals are mainly the Cenozoic regional shales and salt rocks with good sealing ability.Based on the play evaluation method,the 65 basins in South America were divided into 152 plays,the undiscovered recoverable resource of conventional oil and gas in 65 basins in South America were carried out,and the recoverable oil,condensate and gas resources are 263 716 MMB,7 405 MMB and 559 020 BCF respectively.The undiscovered oil and gas resources in South America show the characteristics of"two zones"distribution and"two centers"enrichment.Vertically,it is mainly concentrated in Cretaceous and Tertiary plays.The passive marginal basins and foreland basins belts are the most important areas for oil and gas exploration in South America in the future.The deep-sea and foreland thrust belts are main exploration directions,and Brazil and Venezuela are key countries.

petroleum geologyconventional oil and gasresource evaluationexploration potentialSouth America

刘亚明、马中振、田作基

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中国石油勘探开发研究院,北京 100083

油气地质 常规油气 资源评价 勘探潜力 南美洲

中国石油科学研究与技术开发项目中国石油科学研究与技术开发项目中国石油科学研究与技术开发项目中国石油科学研究与技术开发项目中油国际海外科技项目

2021DJ24032021DJ31052023ZZ072023ZZ192023-YF-01-05

2024

10.12404/j.issn.1671-1815.2303711

科学技术与工程
中国技术经济学会

科学技术与工程

CSTPCD北大核心
影响因子：0.338
ISSN：1671-1815
年,卷(期)：2024.24(6)
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