| 北非地区中生代盆地区域沉积中心发育机制新认识及油气差异富集效应 |
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| 引用本文： | 黄雷,张忠民,赵晓辰,吕雪雁,王爱国,刘池洋,宋世骏,殷珂,李鑫,刘静静.北非地区中生代盆地区域沉积中心发育机制新认识及油气差异富集效应[J].现代地质,2022,36(5):1218-1229. |
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| 作者姓名： | 黄雷 张忠民 赵晓辰 吕雪雁 王爱国 刘池洋 宋世骏 殷珂 李鑫 刘静静 |
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| 作者单位： | 1.西北大学含油气盆地研究所, 陕西 西安 7100692.中国石油化工股份有限公司石油勘探开发研究院, 北京 1000833.西安科技大学, 陕西 西安 710054 |
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| 基金项目： | 国家自然科学基金项目(42272148);国家自然科学基金项目(42230815);中国石化科技部项目(P19021-4) |
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| 摘 要： | 北非地区为世界上油气富集地区之一,区内油气分布表现出极大的不均匀性,以往研究对这一油气差异性富集控制因素的探讨较为薄弱。本研究重点从中生代期间发育的多个区域沉积中心的演化和形成机制的角度,探讨这一科学问题。对已有的基础地质和油气勘探资料的综合再分析表明,北非地区冈瓦纳大陆北缘发育维德迈尔—佩拉杰、苏尔特、东地中海三个彼此孤立存在的中生代沉积中心,这些沉积中心在空间上处于阿拉拉隆起、苏尔特隆起、黎凡特隆起三个海西运动中形成的NE向古隆起之上,具有“古隆起塌陷反转”的形成机理;沉积中心均靠近新特提斯洋边缘,总体呈现受海西运动形成的古隆起和新特提斯洋开启背景下的伸展作用联合控制。三个中生代沉积中心为中生代优质烃源岩发育区和油气富集区;受海西期塑造的古构造、海西构造剥蚀对砂岩储层的控制以及中生代烃源岩发育等有利因素所控,这些塌陷形成的中生代沉积中心及围区成为最为重要的油气富集区带。中生代盆地的这一形成过程为该区油气差异富集的重要控制因素。
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| 关 键 词： | 特提斯构造域 北非 海西运动 构造反转 油气差异富集 |
| 收稿时间： | 2022-03-10 |
| 修稿时间： | 2022-07-30 |
New Insights into the Formation of Mesozoic Depocenters in North Africa and Its Influence on Differential Enrichment in Hydrocarbon |
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| HUANG Lei,ZHANG Zhongmin,ZHAO Xiaochen,LÜ,Xueyan,WANG Aiguo,LIU Chiyang,SONG Shijun,YIN Ke,LI Xin,LIU Jingjing.New Insights into the Formation of Mesozoic Depocenters in North Africa and Its Influence on Differential Enrichment in Hydrocarbon[J].Geoscience——Journal of Graduate School,China University of Geosciences,2022,36(5):1218-1229. |
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| Authors: | HUANG Lei ZHANG Zhongmin ZHAO Xiaochen LÜ Xueyan WANG Aiguo LIU Chiyang SONG Shijun YIN Ke LI Xin LIU Jingjing |
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| Institution: | 1. Institute of Oil and Gas Basin,Northwest University,Xi’an, Shaanxi 710069, China2. Petroleum Exploration and Production Research Institute, SINOPEC, Beijing 100083, China3. Xi’an University of Science and Technology, Xi’an, Shaanxi 710054, China |
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| Abstract: | The North Africa area is extremely rich in hydrocarbon resources. However, the hydrocarbon is also distributed with inhomogeneity within this area. The previous investigations payed less attention to this characteristic of differential enrichment in hydrocarbon. This study mainly focuses on this issue in aspects of the evolution and formation mechanism of Mesozoic basin depocenter. Comprehensive re-analysis on basic geology and hydrocarbon exploration data is implemented. The results indicate that, on the northern margin of Gondwana continent in North Africa, there are three Mesozoic depocenters that exist in isolation from each other, such as Oued Mya-Pelagain, Sirt, Eastern Mediterranean. These three Mesozoic depocenters are located on the three preexisting NE-trending palaeohighs formed during the Hercynian orogeny, Allala, Sirt and Lewant palaeohighs respectively; they have a formation mechanism characterized by “negative inversion and collapse of palaeohigh”. Mesozoic depocenters are also close to the edge of the Neotethys Ocean, indicating that their formations are controlled by preexisting NE-trending Hercynian palaeohighs together with the opening of the Neotethys Ocean. Due to the following favorable factors the areas in or adjacent these Mesozoic depocenters became the most important hydrocarbon enrichment zone: structures related to Hercynian orogeny, sandstone reservoir with good quality produced by erosion on Hercynian palaeohighs, and excellent Mesozoic source rock. Thus the formation process of the Mesozoic basin is one of the most significant factors controlling the differential enrichment in hydrocarbon in the North Africa. |
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| Keywords: | Tethyan tectonic domain North Africa Hercynian orogeny structural inversion differential enrichment in hydrocarbon |
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