Abstract：Through snap shots of seismic wavefield,single-shot records and approximately synthetic stack section,the paper used 2-D elastic wave equation staggering grid high-order finite-difference simulation on arbitrarily relief surface to analyze the feature of elastic wavefield,main type and propagation rule of elastic wave for three simplified model as inclined strata with different dips,relief surface of base rock and simple structure under relief surface.It is shown by model tests that inclined strata in near surface,relief surface of base rock and lateral non-uniformity of velocity can cause non-continuity of refractions.The near-surface velocity structure and geomorphology resulted in not only bend and distortion of events of underground reflections,but also producing severe regular interference.
杨旭明, 裴正林. 复杂近地表弹性波波场特征研究[J]. 石油地球物理勘探, 2007, 42(6): 658-664.
Yang Xu-ming, Pei Zheng-lin. Study on feature of elastic wavefield in complex near surface. OGP, 2007, 42(6): 658-664.
