摘要
在深海拖缆地震勘探中,广泛应用气枪阵列组合。组合激发方式可压制因震源产生的虚反射波。本文利用不同深度气枪子阵列组合并采用延迟激发方式,压制虚反射、改善气枪激发子波的特性及激发子波的信噪比。文中理论模拟和实际资料分析表明,采用气枪阵列延时激发技术在一定程度上拓展了气枪子波频谱,对提高低频和高频成分能量均有一定效果。
The airgun array is widely used nowadays as a source in towed-streamer seismic survey.The array pattern can be used to attenuate the ghost caused by a source.In this paper we propose a method for ghost attenuation using a time-lapse explosion of sub-airgun arrays hanged in different water depths.The method improves the characteristics of source wavelet and signal-to-noise ratio.The theoretical simulation and the actual data show that the time-lapse explosion of airgun array enlarges the frequency spectrum of the source wavelet and improves energy both in low frequency and high frequency.
出处
《石油地球物理勘探》
EI
CSCD
北大核心
2011年第4期513-516,667+491-492,共4页
Oil Geophysical Prospecting
关键词
气枪阵列
延迟激发
海上地震数据采集
激发方式
近场子波
远场子波
airgun array,time-lapse explosion,marine seismic data acquisition,shot mode,near signature,far signature
