| 高邮凹陷汉留1号断层输导通道的时空分布特征 |
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| 引用本文： | 陈星岳,李鹤永,孙思敏,操义军,徐哲航,邹华耀.高邮凹陷汉留1号断层输导通道的时空分布特征[J].现代地质,2022,36(6):1574-1584. |
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| 作者姓名： | 陈星岳 李鹤永 孙思敏 操义军 徐哲航 邹华耀 |
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| 作者单位： | 1.中国石油大学(北京) 地球科学学院,北京 1022492.中国石油大学(北京) 油气资源与探测国家重点实验室,北京 1022493.中国石化江苏油田分公司勘探开发研究院,江苏 扬州 225009 |
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| 基金项目： | 国家科技重大专项(2016ZX05024-003-008) |
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| 摘 要： | 汉留1号断层是苏北盆地高邮凹陷深凹带北侧边界断层。为了明确该断层输导通道的时间与空间分布特征,通过断层面几何形态、关键时期断层活动速率计算,阐释了汉留1号断层在两个油气主运移时期的输导能力,判识了输导通道的空间位置。研究表明,汉留1号断层在三垛组沉积期活动速率>25 m/Ma,断层开启具有输导能力,另一方面,汉留1号断层的断层面存在3个明显的凸面和2个凹面区域,因此,在该沉积期该断层在3个凸面区域发育3条输导通道。而在随后的盐城组至今的沉积期,断层活动强度减弱,活动速率<10 m/Ma,输导能力弱,垂向上主要起封闭作用。因此,空间上断层通道发育于断层面凸面位置;时间上,断层活动速率>25 m/Ma时通道开启,<10 m/Ma时通道关闭。就聚集而言,断层通道开启时油气沿断层向上运移聚集于上部滚动背斜圈闭中,闭合时聚集于下部断层圈闭中。
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| 关 键 词： | 断层输导通道 断层活动速率 断层面几何形态 汉留1号断层 高邮凹陷 |
| 收稿时间： | 2022-09-10 |
| 修稿时间： | 2022-10-20 |
Characteristics of Temporal-spatial Distribution of Fault Conduit for Hydrocarbon Migration within the Hanliu-1 Fault in Gaoyou Sag |
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| CHEN Xingyue,LI Heyong,SUN Simin,CAO Yijun,XU Zhehang,ZOU Huayao.Characteristics of Temporal-spatial Distribution of Fault Conduit for Hydrocarbon Migration within the Hanliu-1 Fault in Gaoyou Sag[J].Geoscience——Journal of Graduate School,China University of Geosciences,2022,36(6):1574-1584. |
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| Authors: | CHEN Xingyue LI Heyong SUN Simin CAO Yijun XU Zhehang ZOU Huayao |
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| Institution: | 1. College of Geosciences,China University of Petroleum(Beijing),Beijing 102249,China2. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249,China3. Exploration and Development Research Institute of Jiangsu Oilfield Company, SINOPEC, Yangzhou,Jiangsu 225009, China |
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| Abstract: | The Hanliu-1 fault is located on the northern border of deeply subsided area in Gaoyou sag, Subei Basin. In order to distinguish the temporal-spatial distribution of the fault conduit, fault activity rate (FAR), fault-plane geometry of the Hanliu-1 fault have been carried out for the two crucial periods of hydrocarbon migration. It is indicated that the Hanliu-1 fault was intensively active with FAR >25 m/Ma and its fault-plane geometry was featured with three obvious convex and two concave fault components during the deposition of the Sanduo Formation. Therefore, the Hanliu-1 fault was opening and three conduits occurred along the three convex fault components during this period. Since the deposition of the Yancheng Formation, the fault activity has decreased in FAR <10 m/Ma and the fault conduits have been getting closing. In conclusion, spatially, the fault conduit often occurs along convex fault component, and temporally, the fault conduit was opening as FAR >25 m/Ma and closing as FAR <10 m/Ma. As to hydrocarbon accumulation in Gaoyou sag, when the fault conduit was opening, oil migrated upwards to fill the roll-over anticline trap, and when closing, oil expelled from source rock charged immediately into the fault trap without vertical migration along the fault. |
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| Keywords: | fault conduit fault activity rate fault-plane geometry Hanliu-1 fault Gaoyou sag |
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