基于近场测量的气枪阵列模拟远场子波
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摘要
气枪阵列远场子波是衡量气枪阵列优劣以及进行海上地震资料处理的重要参数,因此能够随着气枪激发 而实时获得阵列远场子波这一手段逐渐受到地球物理界的重视。但是在水深只有几十米的极浅海海域,无法 满足记录远场子波的要求。为此,我们在渤海湾海域进行了实验,在海上记录下气枪近场子波,随后在计算机上 模拟计算阵列远场子波,计算结果与PGS-Nucleus软件系统模拟子波吻合得较好,从而证明了本方法切实可 行。这为实时获取阵列远场子波提供了可能。
Far-field wavelet is important parameter weighing up the goodness and badness of gun-array and of seismic data processing, therefore, the tool that far-field wavelet of gun-array can be real-time obtained along with gun shooting has been gradually paid attention by geophysical industry. But the demand of recording far-field wavelet can't be met when water depth is only tens meters in ultra-shallow sea area. For that reason, we have been carried experiments in Bohai bay area and recorded near-field wavelet of gun-array on the sea, then computed far-field wavelet of gun-array in the computer. The results fit well with wavelet simulated by PGS-Nucleus software system, which proved feasibility of the method and opened up possibilities for real-time obtaining far-field wavelet of gun-array.
Far-field wavelet is important parameter weighing up the goodness and badness of gun-array and of seismic data processing, therefore, the tool that far-field wavelet of gun-array can be real-time obtained along with gun shooting has been gradually paid attention by geophysical industry. But the demand of recording far-field wavelet can't be met when water depth is only tens meters in ultra-shallow sea area. For that reason, we have been carried experiments in Bohai bay area and recorded near-field wavelet of gun-array on the sea, then computed far-field wavelet of gun-array in the computer. The results fit well with wavelet simulated by PGS-Nucleus software system, which proved feasibility of the method and opened up possibilities for real-time obtaining far-field wavelet of gun-array.
引文
[1] Ziolkowski A . Measurement of air - gun signatures with gun-port pressure transducers. SEG Int'l Exposition and Annual Meeting, 1970,9-14
[2] Keller J B and Kolodner I I. Damping of underwater explosion bubble oscillations. Journal of Applied Physics, 1956
[3]陈浩林等．气枪阵列子波数值模拟．石油地球物理勘 探,2003,38(4):363～368
[4] Ziolkowski A, Parkes G. Hatton L and Haugland T. The signature of an air gun array: Computation from near-field measurements including interactions. Geo-physics, 1982,47(10):1413-1421
[5] Ziolkowski A,Hatton L and Haugland T. The signature of an air gun array Computation from near-field measurements including interactions-practical considerations. The 54th SEG meeting, 1984,105-111
[2] Keller J B and Kolodner I I. Damping of underwater explosion bubble oscillations. Journal of Applied Physics, 1956
[3]陈浩林等．气枪阵列子波数值模拟．石油地球物理勘 探,2003,38(4):363～368
[4] Ziolkowski A, Parkes G. Hatton L and Haugland T. The signature of an air gun array: Computation from near-field measurements including interactions. Geo-physics, 1982,47(10):1413-1421
[5] Ziolkowski A,Hatton L and Haugland T. The signature of an air gun array Computation from near-field measurements including interactions-practical considerations. The 54th SEG meeting, 1984,105-111
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