APPLICATION OF STACKING TECHNIQUE FOR COMMON REFLECTION SURFACE IN YINGGEHAI AND QIONGDONGNAN BASIN
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摘要: 随着莺—琼盆地油气勘探开发的不断深入,2 700 m以下的中深层地震资料品质迫切需要提高,而改善信噪比提高成像质量则是需要深入研究的重点内容之一。基于共反射面元(CRS)叠加在改善中深层地震资料信噪比方面具有理论和技术应用优势,由于考虑了反射层的局部特征和第一菲涅耳带内的全部反射,对复杂地质问题的适应性得以增强,真正实现了高信噪比叠加,从而改善中深层低信噪比区的成像质量。通过理论研究分析、模型试处理及莺—琼盆地实际地震资料处理中具体的应用与试验,取得了明显的效果,即该区中深层地震资料信噪比显著增强,大大提高了解释的可靠程度。总之,共反射面元叠加技术在莺—琼盆地具有较高的推广应用价值。Abstract: With the in-depth geological study in the Yinggehai and Qiongdongnan Basin, it is required to improve the quality of seismic data for deep strata (under-2 700 m). Enhancing S/N ratio for images is one of the choises. The technique of common reflection surface stacking (CRS) has a lot of advantages. It takes not only partial characteristics but also all the reflections in the Fresnel zone into account. CRS stack has good adaptability to a complex geological situation. It can achieve real high S/N ratio stacking for better imaging in the deep layer. The article combines the theoretical analysis, model testing and seismic data processing together. S/N ratio and interpretation reliability are improved for deep seismic data. In this regard, CRS stacking is worthy to be promoted in the Yinggehai and Qiongdongnan Basin.
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Key words:
- S/N ratio /
- CRS stack /
- imaging /
- Yinggehai & Qiongdongnan Basin
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