CT理论与应用研究2017，Vol.26Issue(1)：9-18,10.DOI:10.15953/j.1004-4140.2017.26.01.02
基于 Lowrank 近似的 TTI 介质一步法 qP 波正演模拟
One-step qP-waves forward Modeling in TTI Media with Lowrank Approximation
摘要
Abstract
Forward modeling of quasi-P-waves (qP) in TI medium for practical application draw great attention in recent year. Lowrank two-step wave field extrapolation can eliminate the SV-wave artifacts interference, but the two-step method relies on a real-valued phase function and cannot use in large time step. For this reason, we propose qP wave one-step wave field extrapolation method based on Lowrank approximation, One-step method has the ability to handle complex-valued phase functions, we add velocity gradient term to the phase function, and successfully applied in TTI media qP wave forward modeling. By experiment shows: One-step wave field extrapolation has the advantage the traditional two-step process, no SV-wave artifacts. One-step method is more stable in the large time step, and can reduce computing costs. In the case of anisotropic, the one-step wave field extrapolation applies to any inclinations, and the result of wave field simulation is clear and accurate, with no instability.关键词
正演模拟/一步法/Lowrank 近似/TTI 介质Key words
forward modeling/one-step/Lowrank approximation/TTI medium分类
天文与地球科学引用本文复制引用
朱浩然,孙小东,李振春..基于 Lowrank 近似的 TTI 介质一步法 qP 波正演模拟[J].CT理论与应用研究,2017,26(1):9-18,10.基金项目
国家自然科学基金（41274117；41574098）。 （）
