北京大学学报(自然科学版)

雅克拉断凸张扭断裂构造特征与油气运聚关系

杨圣彬1,2,刘忠宝1,耿新霞3   

  1. 1. 中国石油化工股份有限公司石油勘探开发研究院, 北京 100083; 2. 造山带与地壳演化教育部重点实验室, 北京大学地球与空间科学学院, 北京 100871; 3. 中国地质科学院矿产资源研究所, 北京 100037;
  • 收稿日期:2011-09-02 出版日期:2013-03-20 发布日期:2013-03-20

Relationship Between Gas Accumulation and Structural Characteristics of Extensional-Shear Fault System in Yakela Fault Block

YANG Shengbin1,2, LIU Zhongbao1, GENG Xinxia3   

  1. 1. Exploration and Production Research Institute, SINOPEC, Beijing 100083; 2. The Key Laboratory of Orogenic Belts and CrustalEvolution MOE, School of Earth and Space Sciences, Peking University, Beijing 100871; 3. Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037;
  • Received:2011-09-02 Online:2013-03-20 Published:2013-03-20

摘要: 通过对三维地震资料的解释可知, 雅克拉断凸中的晚第三纪张扭性断裂系统具有东西分块、南北分带的基本特征, 主要发育4种断裂构造样式: 阶梯状断裂构造、掀斜断块构造、堑垒式构造和负花状构造。与张扭性断裂系统有关的圈闭构造样式主要有4种: 断鼻与断背斜、掀斜断块、逆牵引背斜和地垒。张扭断裂系统主要活动期为晚第三纪吉迪克期和康村期, 其形成的圈闭与生烃期有较好的匹配关系。雅克拉断凸张扭性断裂系统在白垩系和第三系油气聚集过程中, 断裂的垂向运移通道作用表现得极为明显, 但是断层的侧向封堵对油气的聚集成藏也起到了至关重要的作用。

关键词: 雅克拉断凸, 中新生界, 张扭断裂体系, 圈闭样式, 侧向封堵

Abstract: Through interpretation of 3D seismic data, the extensional-shear fault system in the Neogene in Yakela fault block has two main features of blocks distributed along east-west and zones distributed along north-south, which develops four fault structural styles, including stepladder fault structure, tilted fault block structure, graben-horst block structure and negative flower shaped structure. There are four trap structural styles associated with extensional-shear fault system, namely fault nose and faulted anticline, tilted fault block, reverse drag anticline and horst. The traps formed by the extensional-shear faults, whose main active period are Suwiyi-Jidike epoch of neogene, well match the periods of hydrocarbon formation reservoirs. The hydrocarbon vertical migration along the extensional-shear fault appears clearly in the process of hydrocarbon accumulation in Cretaceous and Tertiary, but lateral sealing of the extensional-shear fault is vital in the process of pools of petroleum accumulation.

Key words: Yakela fault block, Mesozoic-Cenozoic, extensional-shear fault system, trap structural styles, lateral sealing

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