【摘要】 在海上地震资料采集中,由于海流冲击和系统因素(特别是炮缆长度)等的影响,空气枪震源子阵间距会发生变化,从而引起空气枪震源性能上的改变,给地震资料质量带来一定影响。讨论了子阵间距变化对单枪和相干枪的影响原理和影响程度,定性分析了子阵间距变化对全阵列波场的影响情况,最后给出了监视和监控震源子阵间距变化的几点建议。更多还原

【Abstract】 During the marine seismic acquisition,the distances between sub-arrays of the airgun source may change because of current impact and system factor (especially the length of source streamer),causing changes in the characteristics of the air-gun source,and this would have influence on the acquired seismic data. This article discusses the influence of sub-array spacing variations on single gun and cluster gun,and qualitatively analyzes the impact on the wavelet of the whole source-array. The most effective method to solve the sub-array spacing variation problem is using soft (or hard) connection between sub-arrays. If the connection is unavailable in field production,we should monitor the changes of spacing between sub-arrays,and adjust the spacing in real-time.更多还原