石油物探2012，Vol.51Issue(4)：356-361,6.DOI:10.3969/j.issn.1000-1441.2012.04.006
倾角分解多次波自适应相减方法研究
Multiple self-adaptive subtraction based on dip decomposition
摘要
Abstract
The self-adaptive subtraction is an important procedure of multiple-attenuation by wave-equation prediction subtraction method. With the common L2-norm self-adaptive subtraction algorithm based on minimum energy, when matching, the derived filter operator will damage primary energy if multiples and primaries overlap; therefore, the primary energy will be damaged in subtraction. We proposed a new method that combined Tau-p transform and L2-norm self-adaptive subtraction. Firstly, Tau-p transform is used for dip-decomposition of seismic shot gathers to separate the primaries and multiples in the overlapped area. Secondly, the self-adaptive subtraction is carried out on the data after dip decomposition. Thirdly, the subtraction results are combined as output, which may reduce and even avoid the damage to primaries. Synthetic and actual data testing verified the validity of the method.关键词
多次波/L2范数/自适应相减/倾角分解Key words
multiple/ L2-norm/ self-adaptive subtraction/ dip decomposition分类
天文与地球科学引用本文复制引用
马继涛,姚逢昌,陈小宏,张征..倾角分解多次波自适应相减方法研究[J].石油物探,2012,51(4):356-361,6.基金项目
国家自然科学基金(41004056)项目和中国石油大学(北京)科研基金项目(KYJJ2012-05-05)共同资助. （41004056）
