逆时偏移对复杂构造成像影响因素分析Influence Factor Analysis of Reverse Time Migration for Complex Structure Imaging
张明强,程耀,谢涛,朱金强,王炜,焦叙明,公绪飞
摘要(Abstract)：
逆时偏移是公认的复杂构造成像利器，在海外盐下勘探及陆上西部探区逆掩推覆构造及碳酸盐岩缝洞储集体成像等方面展现出独特优势。目前国内海域勘探逐渐面向中深层复杂构造，本文旨在探索逆时偏移相应的应用潜力以及影响其成像效果的关键因素。结合某工区实际资料，通过与射线类偏移方法成像效果对比，首先详细分析论证逆时偏移可以充分利用棱柱波对高陡构造进行成像的优势；然后进一步展示配合高精度速度模型，逆时偏移可以对强横向变速现象发育的气云区下伏地层进行更好成像的特点。结果表明，在对棱柱波等逆时偏移可以成像的特殊波型进行有效保护的前提下，配合高精度速度模型，该技术在国内海域高陡复杂大断裂、气云区、火成岩及高速灰岩屏蔽区成像等方面有较大的应用潜力。
关键词(KeyWords)： 逆时偏移;高陡构造;棱柱波;强横向变速;气云区
基金项目(Foundation): 中国海洋石油集团有限公司科技项目(编号：CNOOC-KJ 145 ZDXM02 YF 2021-01)
作者(Author): 张明强,程耀,谢涛,朱金强,王炜,焦叙明,公绪飞
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