Structural Characteristics of Yudu Strike-Slip Fault Zone and Their Control on Hydrocarbon Accumulation in Southern Ordos Basin

被引：1
|
作者：
Ye H. [1 ,2 ]
Shi W. [1 ,2 ]
Wang R. [1 ,2 ]
Qi R. [3 ]
Liu K. [1 ,2 ]
Jia H. [3 ]
Lin J. [1 ,2 ]
机构：
[1] School of Earth Resources, China University of Geosciences, Wuhan
[2] Key Laboratory of Tectonics and Petroleum Resources, Ministry of Education, China University of Geosciences, Wuhan
[3] North China Oil and Gas Branch, China Petroleum & Chemical Corporation, Zhengzhou
来源：
Diqiu Kexue - Zhongguo Dizhi Daxue Xuebao/Earth Science - Journal of China University of Geosciences | 2023年 / 48卷 / 06期
关键词：
genetic evolution; oil and gas migration and accumulation; petroleum geology; southern Ordos basin; structural characteristics; Yudu strike-slip fault zone;
D O I：
10.3799/dqkx.2022.476
中图分类号：
学科分类号：
摘要：
In order to improve the understanding of strike-slip fault structure and structural characteristics in Ordos basin, based on the coherent slice and the fine interpretation of the 3D seismic data, in this paper it describes in detail and clarifies the plane and profile activity characteristics of the Yudu strike-slip fault zone in the Zhenjing-Binchang area of the southern Ordos basin. Then, it disscusses its formation and evolution process and its control on hydrocarbon accumulation combined with fluid inclusion dating and previous research results. The study shows follows:(1)According to the plane and profile characteristics of the Yudu strike-slip fault zone, the strata in the study area can be divided into upper and lower tectonic layers by the bottom boundary of the Triassic (T8). The Yudu strike-slip fault zone has obvious difference between the upper and lower structural layers. (2) The Yudu strike-slip fault zone has obvious differences in stratification and segmentation, and the fault activity characteristics differ greatly among different strata. Under the action of Caledonian-Hercynian and Yanshanian-Himalayan stresses, the Yudu strike-slip fault zone mainly experienced three stages of tectonic strike-slip activities, namely, sinistral movement in Late Caledonian-Early Hercynian, dextral movement in Late Hercynian and sinistral movement in Yanshanian-Himalayan. (3) Strike-slip faults and their associated fractures play an important role in the migration and accumulation of oil and gas. The main period of oil and gas accumulation in the study area is the late Early Cretaceous, which is consistent with the activity of Yudu strike-slip fault zone in Yanshanian. © 2023 China University of Geosciences. All rights reserved.
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页码：2294 / 2309
页数：15
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