石油物探2012，Vol.51Issue(5)：451-458,8.DOI:10.3969/j.issn.1000-1441.2012.05.005
网格逐次剖分算法在三维地震射线追踪中的应用
Application of grid successive subdivision algorithm in 3-D seismic ray tracing
摘要
Abstract
First arrival traveltime calculation and path tracing is the key of tomography based on ray theory. Linear traveltime interpolation (LTD algorithm has high tracing accuracy and efficiency, which has been widely used in 2-D condition. However, for 3-D problem,minimum traveltime equation cannot obtain analytic solution. Therefore, on the basis of LTI.an improved grid successive subdivision method was proposed. The method is based on the original LTI network interface subdivision algorithm, which carry out further search by establishing same mode subdivision point array close to the minimum-traveltime subdivision point to obtain minimum-trav-eltime. The method avoids global search caused by the increase of subdivision accuracy and saves computation time. Meanwhile, the method solves 3-D LTI minimum-traveltime computation problem and can achieve higher calculation accuracy with less computation amount. Model testing and actual data application results proved the modification of computation accuracy and efficiency.关键词
三维射线追踪/线性走时插值/网格逐次剖分Key words
3-D seismic ray tracing/ linear traveltime interpolation (LTI)/grid successive subdivision分类
天文与地球科学引用本文复制引用
赵群峰,张东,王敬,张小磊..网格逐次剖分算法在三维地震射线追踪中的应用[J].石油物探,2012,51(5):451-458,8.基金项目
国家科技重大专项课题(2008ZX05020-006)资助项目. （2008ZX05020-006）
