| 天津北大港构造带东翼断裂活动浅析 |
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| 引用本文： | 万贵龙,张德会,张守仁.天津北大港构造带东翼断裂活动浅析[J].地球学报,2011,32(3):373-381. |
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| 作者姓名： | 万贵龙 张德会 张守仁 |
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| 作者单位： | 中国地质大学(北京)地球科学与资源学院;中国地质大学(北京)地球科学与资源学院;中联煤层气有限责任公司 |
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| 基金项目： | 中国石油天然气股份有限公司大港油田分公司科研项目“北大港构造带东翼构造演化及控砂、控油研究”(编号: DGYT-2006- J5-3696) |
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| 摘 要： | 构造因素对油气的分布起着控制性的作用,断裂活动特征决定着一个盆地或凹陷油气的富集与分布.本文通过对北大港构造带东翼所有断裂的仔细研究,统计分析了区内20条规模较大断裂的断距在纵横向上的变化,结合20余条地震剖面和8条构造发育史剖面,综合分析认为北大港构造带东翼的断裂活动主要为:古近纪活动期和新构造期(0.78 Ma至今...
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| 关 键 词： | 北大港构造带东翼 断裂活动 构造样式 形成机制 |
An Analysis of Fault Activities in Eastern Beidagang Tectonic Belt, Tianjin |
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| WAN Gui-long,ZHANG De-hui and ZHANG Shou-ren.An Analysis of Fault Activities in Eastern Beidagang Tectonic Belt, Tianjin[J].Acta Geoscientia Sinica,2011,32(3):373-381. |
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| Authors: | WAN Gui-long ZHANG De-hui and ZHANG Shou-ren |
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| Institution: | School of Earth Sciences and Resources, China University of Geosciences;School of Earth Sciences and Resources, China University of Geosciences;China United Coal-bed Methane Limited Liability Co., Ltd. |
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| Abstract: | Structural factors play a controlling role in the distribution of oil and gas,and oil and gas enrichment and distribution in a basin or in a sag depend on characteristics of fault activities.The authors carefully studied all the fractures in eastern Beidagang tectonic belt,calculated and analyzed fracture distance variations of 20 large faults in vertical and horizontal directions in combination with over 20 seismic sections and 8 structural development profiles in the study area.On such a basis,the authors hold that the main fault activities in eastern Beidagang tectonic belt occurred in Paleocene tectonic period and Neocene tectonic period.In Neocene tectonic period,however,fault activities were extremely weak,and most faults were not active.From evolutionary process and spatial distribution,it is considered that the destructive effect of late tectonic activities on earlier faults was weak,and fault activities were somewhat similar to things of Baishuitou tectonic belt in Gangdong-Tangjiahe tectonic belt,forming a typical flower-shaped structure.Nevertheless,fault activities in Baidong tectonic belt were strong in Neocene tectonic period,and some new faults cut Paleocene strata with some reaching the near-surface place,forming "face toward sloping type" fault combination.The influence of fault activities on hydrocarbon migration and accumulation is also preliminarily discussed in this paper. |
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| Keywords: | eastern Beidagang tectonic belt fault activities tectonic style formation mechanism |
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