摘要
逆时偏移是基于双程波波动方程进行波场逆时外推,再利用成像条件提取成像值,进而实现偏移成像的一种方法.目前,RTM已经由各向同性介质推广到了TI介质,包括VTI介质和TTI介质.考虑了各向异性因素的逆时偏移技术能更好地满足日益增长的勘探精度的要求,进一步提高和改善成像效果.在回顾各向异性介质逆时偏移发展历史的基础之上,本文针对于国内外TTI介质逆时偏移当前的研究现状进行了概述,并对目前TTI介质逆时偏移方法中所存在的特有的数值稳定性和qSV波人为干扰压制问题的解决方法进行了归纳总结.最后对逆时偏移未来的发展方向和研究重点进行了展望.
The reverse time migration is a method of migration that extropolate the wave field base on two-way wave equation, then getting the image using the imaging conditions. Now, RTM has been extended from isotropic media to transversely isotropic （TI） media including vertical TI （VTI） and Tilted TI （TTI） media. The reverse-time migration added to anistropy factors can meet the continually increasing needs of the exploration precision better, and further enhance and improve the quality of image. On the basis of reviewing the developing history of anistropic reverse-time migration, we introduce the current research situation of TTI reverse-time migration, meanwhile, summarize the problems which are owned by TTI reverse-time migration specially, including numerical instabilities and qSV-wave artifacts. Finally, we predict the future development trend and the key point of research.
出处
《地球物理学进展》
CSCD
北大核心
2013年第1期409-420,共12页
Progress in Geophysics
基金
国家油气重大专项(2011ZX05030-004-002)和(2011ZX05019-003)联合资助
