埕岛桩海地区连片地震资料的数据规则化处理

Seismic data regularization by merging processing in ChengdaoZhuanghai area

将数块小三维资料连片处理可以获得大区域的构造成像,较好地解决小区块三维资料单独成像引起的边界效应。由于这些小区块三维资料采集的年度、仪器、方法、面元、地表条件等不同,各区块资料在信噪比、能量、相位、波形、频率等方面存在很大的差异。在进行连片处理时需对资料做规则化处理,以消除这些差异。埕岛桩海地区地表跨越浅海、海陆过渡区和陆地,地震资料由26块小三维组成。通过资料特点的分析和研究,采用波形一致性子波匹配方法、矢量波组时差校正方法、时空变能量统计匹配方法、递进迭合式面元均化方法进行数据规则化处理,较好地解决了资料之间的不一致性问题,取得了预期的成像效果。

Merging processing joints several 3-D seismic data blocks to- gether,for imaging,which can well remove the boundary artifact in migrated sections caused by little pieces of seismic data,and make the structure interpretation more accurate.The little pieces of seis- mic data have a great difference in S/N,energy,phase,wave form and frequency because of the difference in acquisition time,equip- ment,construction method,acquisition grids and surface condi- tion.So,regularization processing should be carried out for seismic data during merging processing to eliminate the differences.The surface conditions in Chengdao-Zhuanghai area include shallow sea, land-sea transitional area,and land.Seismic data is composed of 26 little 3-D seismic data.Through the analysis and study of the char- acteristics of seismic data,some methods were utilized,such as wave shape conformity wavelet matching method,vector wave group moveout correction method,time-space variable energy sta- tistical matching method and prngressive-superimposed bin equali- zation method,which can well solve the difference of several as- pects like wave shape,to settle proper data basis for imaging.Fi- nally,the imaging achieved good result.