混叠数据最小二乘偏移编码策略分析  

Analysis of the encoding strategy for least square migration based on overlapped data

作　　者：黄建平[1] 国运东 孙郧松 李振春[1] 张继光[3] 赵胜天[3] 步长城[3] 

机构地区：[1]中国石油大学(华东),地球科学与技术学院,青岛266580 [2]东方地球物理公司国际事业部,涿州072751 [3]胜利油田物探研究院,东营257022

出　　处：《地球物理学进展》2016年第6期2547-2554,共8页Progress in Geophysics

基　　金：泰山学者工程专项经费;国家重点基础研究发展计划(973)子课题(2014CB239006);国家油气重大专项(2016ZX05002-005-07HZ;2016ZX05014-001-008HZ);国家自然基金(41274124)联合资助

摘　　要：随着三维高分辨率、高精度及宽方位地震采集技术的应用,野外采集获取了大量观测数据,海量数据对地震处理方法提出了更高的要求.本文将编码思想应用于混叠数据处理,能够较好地在提高地震处理效率的同时,压制串扰噪声.不同编码方式及编码算子直接影响成像串扰噪声压制效果、成像精度、计算效率及存储.本文采用在频率域对炮集分频的编码方式,并将其应用在最小二乘偏移当中,通过模型试算分析了动态、静态及动静混合三种编码方式的优缺点,初步探讨了不同编码策略的适应性.With the application of three-dimensional highresolution,high precision and wide-azimuth seismic acquisition techniques,larger and larger field data are recorded which is highly demanding more efficient data processing techniques. In this paper,we propose several kinds of encoding methods for the blended data processing to improve the migration efficient and decrease the crosstalk. Different kinds of encoding approaches and operators affect the cross-talk suppression, imaging resolution, calculation efficiency and memory. We implement frequency-selection encoding strategy on shot-gather in the frequency domain and apply it to the leastsquares migration. By comparing the advantage and disadvantage of three different encoding（ the dynamic, static and mixing）strategies, we give the preliminary relationship between the encoding strategy selection and the quality of the raw blended seismic record.

关 键 词：混叠数据 最小二乘偏移 动态编码 静态编码 混合编码 

分 类 号：P631[天文地球—地质矿产勘探]