【摘要】 针对喀什—西克尔地区山地地震勘探罕见复杂的地貌以及二维地震采集资料信噪比低、构造成像差等特点,对该地区二维地震采集方法进行了分析探讨,分别就其表层调查、激发、接收、观测系统等方面提出了改善该区地震资料质量的方法,即在表层调查中通过"循环迭代"流程加大控制点密度以加强表层调查精度,在激发中采用单井和大面积组合井适当药量的高速层中激发,在接收中采用检波器大面积组合接收,同时利用动态法优化观测系统与宽线大组合的接收技术。经现场采集实践检验,改善后的采集方法明显提高了地震资料的信噪比。更多还原

【Abstract】 The seismic exploration in Kashgar-Xiker mountainous region is very special due to complex geomorphic features. In general,it is characterized by low signal-to-noise ratio and poor imaging during 2D seismic acquisition.In this paper,some acquisition methods are discussed at first;and then,some methods to improve seismic-data quality are presented in terms of surface survey, excitating,receiving,and observation system.These methods include;to infill the control-point density by the Cyclic Iteration to strengthen survey accuracy during surface survey;the high-velocity layer and middle excitating is applied during excitating;the geophone and large-area array receiving are used during receiving; and the observation system is optimized by dynamic method and the receiving technology of wideline and large array is also adopted. In-situ experiments show that the improved methods can evidently increase the signal-to-noise ratio.更多还原