| 过汶川地震主断裂科学钻WFSD-1反射地震采集方法研究 |
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| 引用本文： | 陈强,钱荣毅,常锁亮,姜枚,张贵宾.过汶川地震主断裂科学钻WFSD-1反射地震采集方法研究[J].地球物理学报,2011,54(8):2060-2071. |
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| 作者姓名： | 陈强 钱荣毅 常锁亮 姜枚 张贵宾 |
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| 作者单位： | 1. 中国地质大学(北京)地球物理与信息技术学院,北京 100083;
2. 中国石油大学(北京)资源与信息技术学院,北京 102249;
3. 中国地质科学院地质研究所,北京 100037;
4. 太原理工大学矿业工程学院,太原 030024 |
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| 基金项目： | 科技部科技支撑计划专项"汶川地震断裂带科学钻探(WFSD)"项目之"横穿龙门山地震反射剖面探测及深部结构的地质解释"课题和国家专项"深部探测技术与实验研究(SinoProbe-02-05)"资助. |
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| 摘 要： | 横穿龙门山地震反射剖面系列探测是WFSD工程中的一项重要研究内容.通过WFSD-1先导孔区二维反射地震的观测方法研究和试验,实现了预期目标:(1)在震后恶劣的天气、陡峭地形和地表严重破裂、破碎、滑塌等困难条件下,获得了WFSD工程首条分辨率较高的二维反射地震剖面;(2)从地学研究目的出发,结合龙门山地区的复杂地震地质条...
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| 关 键 词： | 科学钻探 映秀-北川断裂 反射地震 采集方法 |
| 收稿时间： | 2010-10-19 |
Acquisition method study of 2D reflection seismic short profile through WFSD-1 in main faults of Wenchuan earthquake |
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| CHEN Qiang,QIAN Rong-Yi,CHANG Suo-Liang,JIANG Mei,ZHANG Gui-Bin.Acquisition method study of 2D reflection seismic short profile through WFSD-1 in main faults of Wenchuan earthquake[J].Chinese Journal of Geophysics,2011,54(8):2060-2071. |
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| Authors: | CHEN Qiang QIAN Rong-Yi CHANG Suo-Liang JIANG Mei ZHANG Gui-Bin |
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| Institution: | 1. Geophsics and Information Technology Institute, CUG, Beijing 100083, China;
2. Resources and Information Technology Institute, CUP, Beijing 102249, China;
3. Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037,China;
4. Taiyuan University of Technology, Taiyuan 030024,China |
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| Abstract: | The serial reflection seismic profiles investigation across the Longmen Mountain is an important project in Wenchuan Earthquake Fault Zone Scientific Drilling (WFSD). The 2D artificial reflection seismic experiment in Scientific Drilling Site of WFSD-1 Pilot hole completed the prescribed task, including:(1) Successfully obtained the first 2D reflection profile of WFSD in extreme adverse environments with steep terrain, developing ruptures, fracture, slumped bodies and bad weather, right after the 5·12 Wenchuan earthquake; (2) Based on the study of the complex structure condition in Middle Longmenshan Fore-mountain area, seismic data acquisition methods featuring high spatial and time sampling density were proposed for detecting the complex geological reflective bodies in the shallow, middle and deep part of the area, providing the basic idea and acquisition parameters for the next observations; (3) It is the first of such studies to find multi-level geological body reflectors in the western part (5 km) to the exposed location of Yingxiu-Beichuang faults. The middle and deep reflection body below 1.2 s show obvious layer formation of sediment or metamorphosed rocks. It is estimated that the maximum thickness of Penguan Complex is about 3 km. (4) The Guanxian-Anxian faults area shows clear double-layer reflection structure. The concealed piedmont zone has complete sediment system. (5) Employing dense observation method with 20~30 m shot and 10m receiver spacing within 800 m of WFSD-1, the study acquired reliable raw data for highly-accurate calibration to reflectors within the depth of WFSD-1. |
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| Keywords: | Scientific drilling The Yingxiu-Beichuan faults Reflection seismic investigation test Acquisition method |
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