【摘要】 对一种能增强工程地震勘探数据质量的新叠加技术——零偏移距共反射面叠加进行了研究。目前模拟零偏移距剖面常规方法存在需要精确宏速度模型及不能对地下反射界面产生最佳照明的问题,而零偏移距共反射面叠加具有完全数据驱动、与宏速度模型无关、能够产生对地下反射界面最佳照明及提高模拟零偏移距剖面成像质量的优势。针对零偏移距共反射面叠加还未在国内工程地震勘探中进行广泛应用的现状,详细介绍了零偏移距共反射面叠加基本原理及其实现过程,并使用一套人工合成断层模型数据及来自某高速公路段附近一条二维测线的实际工程地震勘探数据进行了测试计算。理论模型试算结果及在工程地震勘探实际资料处理中的应用表明零偏移距共反射面叠加可提高地震数据信噪比,增强地震反射同相轴连续性,改善模拟零偏移距剖面质量,是一种非常有发展前景的工程地震成像方法。更多还原

【Abstract】 The zero-offset common reflection surface(ZO CRS) stack,which is a new stacking method to enhance the quality of engineering seismic data,was investigated.The conventional methods of zero-offset(ZO) section simulation need precise macro-velocity model and can not provide the best illumination for the reflecting interface in the subsurface.The ZO CRS stack is an entirely data-oriented seismic reflection imaging approach of ZO section simulation in a macro-velocity model independent way,and this method can provide the best illumination for the reflecting interface in the subsurface and enhance the simulated ZO section.Because the ZO CRS stack was not applied in Chinese engineering seismic prospecting widely,the theory and implementation of ZO CRS stack were introduced in detail.The ZO CRS stack was applied to a synthetic data set of fault model and a real data set from a two-dimensional seismic line acquired nearby a certain highway,respectively.Application of ZO CRS stack on synthetic examples and engineering seismic records showed that the technique can improve the stacked section by increasing the signal-to-noise ratio and enhancing the consistence of reflection event,and the results reveal that the ZO CRS stack method is a promising engineering seismic imaging method of ZO section simulation.更多还原