地震共中心点道集的滑动基准面静校正和动校正叠加理论模型计算和分析

THE STACKING THEORETIC MODEL CALCULATION AND ANALYSIS FOR THE STATIC AND NMO CORRECTION OF THE SEISMIC RECORD IN CMP GATHER AT THE SLIP REFERENCE PLANE

本文通过对两个典型地形起伏的四个水平界面理论地质模型的计算和分析 ,进一步阐明了在复杂地形条件下用常规水平基准面静、动校正方法进行反射波法多次覆盖 ,不仅达不到较为理想的多次覆盖的目的 ,反而使之同相轴发生畸变并产生假的同相轴特征的主要原因及该方法所存在的问题 ;证明了滑动基准面静、动校正叠加方法在复杂地形地区从事地震反射波法多次覆盖技术勘探的有效性。

Two typical theoretical geological models with four horizontal interfaces and rugged topography are calculated and analysed in this paper.The results further demonstrate that the application of conventional static and NMO correction of level datum plane to reflection multiple stacking under the condition of complex topography fails to achieve the aim of ideal multiple stacking and,what is more, gives rise to the problem of producing distortion of phase axis and character of false events. It is proved that the method of static and NMO correction and stacking at slip reference plane using reflection multiple stacking technique in areas with complex topography is effective, practical and operable.