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摘要:
海上水平拖缆地震采集数据由于受虚反射(鬼波)的影响,导致其地震数据成像分辨率降低,直接影响到海上油气藏储层描述中地震解释的准确性及精度。现有的鬼波压制方法通常将源、缆鬼波分开处理,且没有考虑偏移距对鬼波延迟时的影响。针对鬼波延迟随偏移距变化,提出了同步压制源、缆及源缆鬼波的技术。理论模型试算和实际数据处理结果表明,本方法计算稳定,可有效压制海上水平拖缆地震数据中的鬼波,较好地恢复受鬼波陷波影响频段的能量,提升成像数据品质。
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关键词:
- 海上勘探 /
- 水平拖缆 /
- 偏移距影响鬼波延迟时 /
- 同步压制 /
- 源缆鬼波
Abstract:Due to the influence of ghost reflection (ghost wave), the imaging resolution of offshore horizontal streamer seismic data is reduced, which directly affects the accuracy and precision of seismic data interpretation in the description of offshore oil and gas reservoirs. The existing ghost suppression methods usually treat the source and cable ghost waves separately, and do not consider the effect of offset on the ghost wave delay. This paper presents a technique to suppress ghost wave from source, cable and source-cable simultaneously when the delay of ghost wave varies with offset. The experimental results of theoretical model and real data processing show that the proposed method is stable and can effectively suppress the ghost wave in offshore horizontal streamer seismic data, recover the energy of the frequency band affected by the ghost wave notch, and improve the quality of imaging data.
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