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摘要:
浅水地震勘探中，由于水层较浅，多次波普遍发育，而且很难压制，如何更好地压制浅水多次波成为了海洋地震资料处理的重要环节。目前来说，依靠单一的多次波压制技术很难将浅水多次波压制彻底，因此本文探索了一种组合压制浅水多次波的思路，首先基于确定性水层多次波压制方法（DWD）将短周期多次波实现压制，然后采用自由表面多次波压制技术（SRME）将近偏移距长周期多次波进行压制，最后再采用高精度Radon变换，将残留的中、远偏移距长周期多次波完成压制。通过辽东湾海域浅水实际资料的多次波压制效果可以看出，组合压制技术实现了对于资料中发育的浅水多次波的良好压制，陷波频率得到较好的恢复，资料品质得到有效改善，信噪比得到有效提高。
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关键词:
- 浅水 /
- 多次波组合压制 /
- 确定性水层多次波压制 /
- 自由表面多次波压制 /
- 高精度Radon变换
Abstract:In shallow water seismic exploration, multiple waves are generally developed and difficult to suppress as water is shallow. How to better suppress shallow water multiples has been an important part of marine seismic data processing. At present, it is difficult to completely suppress shallow water multiples by relying on a single multiple suppression technology. Therefore, a combination suppression technology of shallow water multiples was explored. First, deterministic water-layer demultiplex (DWD) was used to suppress short-period multiples, and then the Surface-Related Multiple Elimination (SRME) was used to suppress the long-period multiples with a short offset distance. Finally, high-resolution Radon transform was used to suppress the residual medium and long offset long-period multiples. It can be seen from the multiple suppression effect of real shallow water data in the Liaodong Bay, the combined suppression technology achieved a good suppression of shallow water multiples as shown in the data reported. The notch frequency was better recovered, the data quality was effectively improved, and the signal-noise ratio was effectively improved.
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