喀什-阿图什地区山地地震采集方法分析  

Seismic acquisition methods suitable for the mountainous areas in Kashen-Atushen block

作　　者：罗仁泽[1] 罗果[2] 梁黎明[3] 

机构地区：[1]电子科技大学中山学院,广东中山528402 [2]川庆石油地球物理勘探公司,四川成都610000 [3]西南石油大学,四川成都610500

出　　处：《勘探地球物理进展》2009年第3期202-206,共5页Progress in Exploration Geophysics

摘　　要：喀什-阿图什地区位于塔里木盆地西南部,塔西南坳陷喀什凹陷北缘。地形、地貌极其复杂,山峦叠嶂、沟壑纵深,地形相对高差达千米,具有国内外山地地震勘探罕见的复杂地貌。经过多年攻关,现有二维地震资料仍具有信噪比低、构造成像差的特点。分析了2005年喀什阿图什地区二维地震采集方法,就激发、接收、观测系统和低降速带地震信号补偿方面提出了改善该区及类似复杂山地地区地震资料品质的方法,具体包括分区组合激发、检波器拉开面积组合方式接收、灵活观测系统及低降速带地震信号补偿等。并通过同类工区的实际应用验证了方法的参考价值。Kashen-Atushen block locates in the north edge of Kashen sag in southwestern Tarim Basin.It is a mountainous area featured by a chain of mountain peaks and variable troughs.With an elevation difference of over 1000m,this area has a complex landform that is rarely seen both in China and abroad.The existing 2-D seismic data in general are low in signal-to-noise ratio and poor in imaging of structures,though over years efforts have been made in tackling the key technical problems in seismic data acquisition.In this paper,the author reviewed the 2-D seismic survey carried out in 2005 and summarized some feasible ways to improve the data quality in terms of seismic wave activation and receiving,layout design,as well as the compensation of seismic signals.The proposed methods have been confirmed by the practices in the survey areas with similar geological conditions.

关 键 词：低信噪比 复杂地区 地震采集 

分 类 号：P631.42[天文地球—地质矿产勘探]