联合垂直地震剖面资料提高地面地震资料分辨率的应用研究

介绍利用三分量垂直地震剖面(VSP)资料中的纵波初至求取地层品质因子Q值的原理及方法、稳定化的反Q滤波方法,以及实现联合VSP地震资料进行反Q滤波提高分辨率处理的技术流程。利用三分量VSP资料估算的弹性参数可以与地层的Q值进行对比分析,证实估算的地层Q值的准确性。实际VSP资料和过井的地面地震资料的应用研究结果表明,所提方法与技术流程是可行的,能够在不影响地震资料信噪比的情况下提高地面地震资料的分辨率。与VSP走廊叠加结果对比结果表明,提高分辨率后的地震资料与VSP结果具有很好的一致性。

Application of improving surface seismic resolution using vertical-seismic-profile data

The theory and method of quality factor(Q) estimation using P-wave first break in three-component vertical-seismic-profile(VSP) seismic data,stabilized inverse Q-filtering method were given and a processing flow for improving surface seismic data resolution combined with VSP seismic data was proposed.The elastic parameters can be derived from three-component VSP seismic dataset,such as velocity ratio of P-and S-wave,Poisson’s ratio and volume modulus.These parameters can be used to correct the Q model estimated from VSP seismic data.The results of real field VSP seismic data and seismic data across the well show that the methods and technique process are feasible.It can enhance the seismic resolution without effects on the seismic signal-to-noise ratio.Compared with the stacked VSP seismic trace to the seismic sections before and after inverse Q filtering,the seismic data with high resolution agrees well with the VSP results.