Amplitude-preserved multiple suppression based on expanded pseudo-multi-channel matching
LI Zhen-chun1, LIU Jian-hui2, GUO Chao-bin1, GUO Shu-juan1, ZHANG Chuan-qiang1
1 School of Earth Resources and Information,China University of Petroleum,Qingdao,Shandong,266555,China;
2 Bohai Research Institute of Exploration and Development,CNOOC,Tianjin,300452,China
Abstract：The wave-equation-based multiple attenuation method mainly consists of two steps:multiple prediction and multiple matching subtraction.The effectiveness of multiple suppression depends on these two steps.Here an improved approach is introduced.On the basis of SRME and the expanded pseudo-multi-channel matching,we propose three strategies to achieve the multiple suppression in the condition of amplitude preservation: 1) Multiple prediction and matching according to orders;2) Effective energy preserving before matching processing;3) Using iterative short filter during matching.Sigsbee2B model test and real data processing show that this method is effective in improving the adaptive subtraction in multiple suppressions while primary amplitude well preserved.
