CAJ | 학술논문

针对海洋地震数据自由表面多次波的衰减方法,重点研究了如何从原始地震数据中减除多次波的匹配相减方法。总结了常规匹配相减方法和改进的匹配相减方法,并分析了滤波因子长度、时窗大小和相邻匹配道数对匹配相减结果的影响。编写了改进的扩展多道匹配相减方法模块,通过模型和实际地震数据的测试,验证了该方法在多次波衰减中的有效性和模块的稳定性。
침대해양지진수거자유표면다차파적쇠감방법,중점연구료여하종원시지진수거중감제다차파적필배상감방법。총결료상규필배상감방법화개진적필배상감방법,병분석료려파인자장도、시창대소화상린필배도수대필배상감결과적영향。편사료개진적확전다도필배상감방법모괴,통과모형화실제지진수거적측시,험증료해방법재다차파쇠감중적유효성화모괴적은정성。
According to the free-surface related multiple attenuation methods of marine seismic data,we studied how to subtract predicted multiple model data from original data using matching filters.Conventional and modified matching filters were summarized.Three dominating parameters,length of filter,length of window and number of neighbor trace which involved in calculation,which affect the final subtraction result were analyzed.A module of the modified expanded multichannel matching method was completed and applied on synthetic and real seismic data.The multiple attenuation result shows that the method is effective and stable.