摘要
单道地震电缆采用检波器线性组合方式,单道地震剖面的信噪比和分辨率与检波器线性组合特性密切相关。将对检波器线性组合方式的方向特性和滤波特性进行了理论分析,并结合海上试验数据,对不同勘探目的、作业水深和检波器线性组合参数条件下的单道地震剖面及其频谱进行对比分析。研究结果认为:在浅水海域,或探测目标层较浅的海洋单道地震勘探中,可选择检波器数量较少且相邻检波器间距较小的检波器组合方式,以提高资料分辨率;而在深水海域和探测目标层较深的海洋单道地震勘探时,应该选择检波器数量较多且相邻检波器间距较大的检波器组合方式,以改善资料信噪比。
The single channel seismic cable uses geophone linear array to acquisite seismic profile, The profile＇s signal to noise ratio and resolution is closely related to the character of geophone linear array. This paper analyzes the directional character and filter character of the geophone linear array, and does comparative analysis of single channel seismic profiles and spectrums which are acquisited in different exploration purpose,water depth and parameters of the geophone linear array by combining with test data. The results show that： we should choose the geophone linear array which uses fewer geophones and smaller adjacent geophone spacing to detect shallower target layer in the shallow waters, so that we can improve the profile＇s resolution. On the other hand, we should choose the geophone linear array which uses more geophones and bigger adjacent geophone spacing to detect deeper target layer in the deep waters, so as to improve profile＇s signal to noise ratio in this way.
出处
《华南地震》
2015年第2期60-66,共7页
South China Journal of Seismology
基金
国家863课题:天然气水合物冷泉声学采集技术(课题号:2013AA0925010102)
关键词
单道地震
接收电缆
检波器
分辨率
信噪比
Single channel seismic
Seismic cable
Geophone
Resolution
Signal to noise ratio
