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斜缆采集是近些年发展起来的海上采集技术,主要为了压制虚反射,获得高品质的宽频地震资料。线形斜缆和弧形斜缆是目前最常用的斜缆类型,能够获取较多的高低频信息。针对这两种斜缆采集方式,通过对比不同采集参数的地震记录及其消除虚反射后的数据,发现弧形斜缆采集观测系统明显优于线形斜缆,不仅在波场模拟中表现出较好的特征,而且在虚反射消除的过程中,引入了较小的噪声,能够获得较高信噪比的地震资料。分析模型测试的结果,证明海上地震勘探中更适合采用弧形斜缆。
Oblique cable acquisition is the marine acquisition technology developed in recent years, mainly in order to suppress the ghost reflection and obtain high-quality broadband seismic data. Linear skew and curved skew are the most commonly used types of skew cable, can get more high and low frequency information. Aiming at the two kinds of oblique cable acquisition methods, by comparing the seismic records with different acquisition parameters and eliminating the data after virtual reflection, we found that the observation system of curved inclined cable acquisition is obviously better than the linear inclined cable. Good features, and in the process of eliminating ghost reflections, less noise is introduced and seismic data with higher signal-to-noise ratio can be obtained. Analysis of the results of the model test proves that it is more suitable to adopt curved inclined cable in marine seismic exploration.