三维地震在城市活断层探测中的应用
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摘要
城市活断层探测是一项非常复杂的课题。目前用于城市活断层探测的主要物探方法是二维地震勘探。二维地震勘探由于使用大偏移距、单边激发观测系统,对浅部地层的探测不利。三维地震勘探由于数据量大、偏移归位准确、横向分辨率高、探测深度范围大,有利于对复杂构造和小构造的研究。该文结合工程实例,介绍了三维地震在城市活断层探测中的应用,即观测系统选取、资料采集、资料处理、解释方法和应用效果。
Urban active fault detection is an extremely complex topic.At present 2-D seismic exploration is the main geophysical method in the urban active fault detection.Because of using larger offset and single-end spread observation system,it is unavailable to detect the shallow stratum.3-D seismic exploration is advantageous in the complex structure and the small structure study,in which there are mass data,with accurate return offset,the high transverse resolution and large detection depth.In this paper,combined with engineering examples,the application of 3-D seismic exploration in urban active fault detection is introduced,including selection of observation system,data acquisition and processing,interpretation method and aplication effect.
引文
1潘纪顺,张先康,刘保金,等.城市活断层的抗干扰高分辨率浅层地震勘探研究.中国地震,2003,19(2):148~157
    2高景华,徐明才.地震反射方法探测城市活断层中的几个问题.地质与勘探,2004(增刊),91~95
    3潘纪顺,刘保金,朱金芳,等.城市活断层高分辨率地震勘探震源对比试验研究.地震地质,2002,24(4),533~540
    4邓起东,徐锡伟,张先康,等.城市活动断裂探测的方法和技术.地学前缘,2003,10(1):93~103

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