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在地下构造复杂、断层发育地层中,常规水平叠加方法效果差,而常规的DMO算法计算效率低,实用性差。这篇文章通过对时间轴引用对数拉伸变换以提高计算速度和成像质量,运用DMO对数拉伸校正方法,对逆掩推覆构造物理模拟资料和实际资料进行了处理分析。DMO对数拉伸方法比常规水平叠加方法效果好,增强了断面反射,在倾斜地层和复杂构造地层中能更好地进行同相叠加,更加有利于逆掩推覆构造区地震资料成像,更有实用性。
In the underground complex structure and fault development stratum, the conventional horizontal stacking method is ineffective, while the conventional DMO algorithm has low computational efficiency and poor practicability. In this paper, the logarithmic stretching transformation is applied to the time axis to improve the calculation speed and imaging quality. The DMO logarithmic stretching correction method is used to deal with the physical simulation data and actual data of the overthrust nappe structure. The DMO logarithmic stretching method is more effective than the conventional horizontal stacking method and enhances the cross-section reflection. Therefore, the DMO logarithmic stretching method can better perform in-phase stacking in the inclined stratum and the complex structural stratum, which is more favorable for the imaging of the seismic data in the overthrusting nappe zone Practicality.