照明分析技术在复杂地区地震采集参数优化中的应用

Application of Illumination Technology for Optimizing Seismic Acquisition Parameter in Complex Areas

复杂地表及地下地质条件严重影响地震资料的质量,特别是近地表火成岩区对下伏地层产生强烈的屏蔽作用,以及复杂断裂带的复杂断块会引起地震波能量分布的严重不均匀性。通过运用波动方程照明分析技术,分析了火成岩区和复杂断裂带的照明能量特征,确定了面向勘探目标的最佳激发范围,提高了照明阴影区的照明强度,优化了地震采集观测系统参数,从而确保了目的层成像效果,提高了野外施工效率和三维地震数据采集质量。

Complex surface and ground geologic conditions would seriously affect the quality of seismic data,especially igneous rocks from near-surface would induce a shielding effect on the underlying strata,and the asymmetry of seismic wave energy would be unevenly distributed in the complex fault,by using the illumination technology of wave equation,the characters of illumination energy in complex area was analyzed.The best shooting area of acquisition object is determined,and the illumination strength of shadow area is enhanced,the seismic acquisition parameters are optimized to ensure the effect of image in the target zones and the efficiency of field operation and quality of 3D seismic acquisition are enhanced.