岩性油气藏 ›› 2022, Vol. 34 ›› Issue (4): 79–88.doi: 10.12108/yxyqc.20220408

• 地质勘探 • 上一篇    下一篇

鄂尔多斯盆地西缘二叠系隐伏构造特征及勘探意义

阴钰毅1,2, 姚志纯3, 郭小波1, 王乐立2, 陈思谦2, 余小雷2, 岑向阳2   

  1. 1. 西安石油大学 地球科学与工程学院 陕西省油气成藏地质学重点实验室, 西安 710065;
    2. 中国石油集团东方地球物理勘探有限责任公司研究院 长庆分院, 西安 710021;
    3. 中国石油长庆油田分公司 勘探事业部, 西安 710018
  • 收稿日期:2021-08-30 修回日期:2022-02-11 出版日期:2022-07-01 发布日期:2022-07-07
  • 第一作者:阴钰毅(1990-),男,西安石油大学在读硕士研究生,研究方向为地震勘探。地址:(710021)陕西省西安市未央区东风路长庆未央大厦。Email:234296347@qq.com。
  • 基金资助:
    中国石油天然气股份有限公司“十四五”科技项目“物探采集处理解释关键技术研究课题五：“页岩油气地震地质工程一体化储层评价关键技术研究”（编号：2021DJ3705）资助

Characteristics of Permian concealed structures in western margin of Ordos Basin and its significance for oil and gas exploration

YIN Yuyi1,2, YAO Zhichun3, GUO Xiaobo1, WANG Leli2, CHEN Siqian2, YU Xiaolei2, CEN Xiangyang2   

  1. 1. School of Earth Science and Engineering, Xi'an Shiyou University, Shaanxi Key Laboratory of Petroleum Accumulation Geology, Xi'an Shiyou University, Xi'an 710065, China;
    2. Changqing Branch, Geophysical Research Institute, BGP, CNPC, Xi'an 710021, China;
    3. Department of Exploration, PetroChina Changqing Oilfield Company, Xi'an 710018, China
  • Received:2021-08-30 Revised:2022-02-11 Online:2022-07-01 Published:2022-07-07

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摘要： 利用线束三维地震、非地震以及YT2等井的实钻资料，结合鄂尔多斯盆地西缘银洞子地区构造演化特征及其与油气成藏的关系，对该区逆冲推覆构造的构造特征、油气成藏条件和勘探前景进行了研究。研究结果表明：①鄂尔多斯盆地西缘银洞子地区构造模式为典型的前展式逆冲构造，新逆冲体发育在老逆冲体之下，自西向东发育韦州—安国断裂（韦安断裂）、青龙山—平凉断裂（青平断裂）及惠安普—沙井子断裂（惠沙断裂）。②在惠沙断裂与青平断裂下盘，受燕山期自西向东的推覆应力作用，地层发生褶皱变形，发育呈排状展布的隐伏构造。③在鄂尔多斯盆地西缘，隐伏构造对油气成藏具有明显的控制作用。隐伏构造内二叠系源储配置关系良好，发育多套砂岩储层，圈闭较多，且保存条件较好，是鄂尔多斯盆地西缘上古生界勘探领域的重要有利区带。

关键词: 隐伏构造特征, 构造演化, 油气成藏, 二叠系, 鄂尔多斯盆地西缘

Abstract: Based on the actual drilling data of 3D seismic,non-seismic and wellYT2,combined with the structural evolution characteristics of Yindongzi area in the western margin of Ordos Basin and its relationship with oil and gas accumulation,the structural characteristics,oil and gas accumulation conditions and exploration prospects of thrust nappe structure in this area were studied. The results show that:(1)The structural model of Yindongzi area in the western margin of Ordos Basin is a typical forward thrust structural,moreover,the new thrust bodies were developed under the old ones,with Weizhou-Anguo fault(Wei'an fault),Qinglong Mountain- Pingliang fault(Qingping fault)and Huianpu-Shajingzi fault(Huisha fault)stretching from the west to the east accordingly.(2)There were obvious folding and deformation within the strata in the footwall of Huisha fault and Qingping fault because of the effect of nappe stress from west to east in Yanshan period,additionally,there were concealed structures developed in rows.(3)The concealed structures have obvious controlling effect on hydrocarbon accumulation in the western margin of Ordos Basin. With good source-reservoir assemblages in Permian, the concealed structures promote the development of multiple sets of sandstone reservoirs,and the development traps are relatively considerable and the preservation conditions are relatively better to some extent. Therefore,it is regarded as favorable areas for the exploration within Upper Paleozoic in the western margin of Ordos Basin.

Key words: features of concealed structure, tectonic evolution, hydrocarbon accumulation, Permian, western margin of Ordos Basin

中图分类号: 

  • TE121.2
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