岩性油气藏 ›› 2023, Vol. 35 ›› Issue (6): 29–36.doi: 10.12108/yxyqc.20230604

• 地质勘探 • 上一篇    下一篇

南美洲Oriente盆地斜坡带W区块构造-岩性复合油藏成藏模式及有利区预测

马文杰1, 王景春2, 田作基3, 马中振3, 万学鹏1, 林金逞1, 许翔麟1, 周玉冰3   

  1. 1. 中国石油(厄瓜多尔)安第斯公司, 厄瓜多尔基多 999165;
    2. 中国石油国际勘探开发有限公司, 北京 100034;
    3. 中国石油勘探开发研究院, 北京 100083
  • 收稿日期:2023-04-24 修回日期:2023-05-12 出版日期:2023-11-01 发布日期:2023-11-07
  • 第一作者:马文杰(1969—),男,博士,教授级高级工程师,主要从事油气勘探方面的研究工作。地址:(999165)厄瓜多尔基多市联合国E10-44和萨尔瓦多共和国Citiplaza大厦。Email:mawenjie@cnpcint.com。
  • 通信作者: 马中振(1980-),男,博士,高级工程师,主要从事油气勘探方面的工作。Email:mazhongzhen@petrochina.com.cn
  • 基金资助:
    中国石油天然气股份有限公司科学研究与技术开发项目“海外前陆盆地勘探评价技术研究”(编号:2021DJ3105); 中油国际海外科技项目“美洲重点地区油气成藏规律研究及潜力评价”(编号:2023-YF-01-05)联合资助

Accumulation model and favorable area prediction of structural-lithologic composite reservoirs in block W,the slope zone of Oriente Basin,South America

MA Wenjie1, WAGN Jingchun2, TIAN Zuoji3, MA Zhongzhen3, WAN Xuepeng1, LIN Jincheng1, XU Xianglin1, ZHOU Yubing3   

  1. 1. Andes Petroleum Company Limited, Quito 999165, Ecuador;
    2. China National Oil and Gas Exploration and Development Corporation, Beijing 100034, China;
    3. PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China
  • Received:2023-04-24 Revised:2023-05-12 Online:2023-11-01 Published:2023-11-07

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摘要： 通过岩心观察、地震解释、储层反演、原油地化分析、油源对比、油气运移示踪分析等对南美洲Oriente盆地斜坡带W区块典型构造-岩性复合油藏的成藏规律进行了分析,并指出了下一步的有利勘探方向。研究结果表明:①Oriente盆地斜坡带W区块构造-岩性复合油藏整体为西倾和西南倾单斜构造,局部发育鼻隆,油藏目的层为白垩系Napo组M1ss段,砂体呈北西—南东向,储层厚度大、物性好。②研究区河口湾砂坝控制有利储层分布,W区块平稳的西倾和西南倾单斜鼻隆构造背景与NW—SE走向的泥岩条带配合控制圈闭形成,有效油气运移通道的空间展布控制成藏。③构造-岩性油藏为三阶段成藏模式,早期常规原油充注,中期原油遭受降解,晚期常规原油混合降稠。④W区块南部地区2个泥岩条带的西南部位是W区块构造-岩性复合圈闭的有利发育区。

关键词: 构造-岩性复合油藏, 成藏模式, 斜坡带, 白垩系, 前陆盆地, Oriente盆地, 南美洲

Abstract: Through core observation,seismic interpretation,reservoir inversion,crude oil geochemical analysis,oil-source correlation,and oil and gas migration tracing analysis,the accumulation rules of typical structurallithologic composite reservoirs in block W of the slope zone of Oriente Basin in South America were analyzed,and the further favorable exploration directions were pointed out. The results show that:（1）the structurallithologic composite reservoirs in block W of the slope zone of Oriente Basin are generally characterized by westsouthwest dipping monoclinic structures,with local nose uplifts. The target layer of the oil reservoirs is M1ss member of Cretaceous Napo Formation. The sand bodies are NW-SE trending,with a large reservoir thickness and good physical properties.（2）Reservoir distribution is controlled by the sandbars in estuaries,the NW-SE extends shale belt and stable west-southwest dipping nose uplifts background joint control the trap formation and the spatial distribution of effective oil migration pathway controls reservoir formation.（3）There are three stages for structural-lithologic reservoir formation,including the early conventional crude oil filling stage,the middle stage for crude oil degradation,and late stage of conventional crude oil mixing.（4）The southwest part of the two shale belts in southern area of block W is favorable for structural-lithologic traps.

Key words: structural-lithologic composite reservoirs, accumulation model, slope zone, Cretaceous, foreland basin, Oriente Basin, South America

中图分类号: 

  • TE122.1
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