物探化探计算技术2018，Vol.40Issue(2)：156-161,6.DOI:10.3969/j.issn.1001-1749.2018.02.03
倾角约束的非线性层析反演速度建模技术
Dip constrained non-linear tomography inversion technology for velocity modeling
摘要
Abstract
The shallow velocity anomaly makes structure imaging in the depth domain distorted,the shaping of the abnor-mal body is very time-consuming,and it is necessary for the processing people to master certain geological knowledge.Be-cause the limited range of effective offsets in the shallow layer is used to estimate the residual move out(RMO),which makes it difficult to characterize the velocity model accurately.Dip constrained non-linear tomography inversion provides a very ef-fective means,it introduces an additional term in the cost function involving the dip of locally coherent events,the velocity is then updated to match the expected dip of the re-migrated events,so as to achieve the purpose of precise velocity modeling. The experimental results show that dip constrained non-linear tomography inversion technique can solve the problem of small-scale velocity variations,correcting for event pull-down effects because of the abnormal body,resulting in improved deep depth imaging.关键词
倾角约束/非线性/层析反演/速度建模/小尺度Key words
dip constrained/non-linear/tomography/velocity modeling/small scale分类
天文与地球科学引用本文复制引用
王兆旗,李立胜,叶月明,丁梁波,魏晋平..倾角约束的非线性层析反演速度建模技术[J].物探化探计算技术,2018,40(2):156-161,6.基金项目
国家自然科学基金项目(41504105) （41504105）
