作　　者： ; ; ; ; ;

机构地区： 中国石油天然气集团公司

出　　处： 《新疆石油地质》 2010年第6期654-656,共3页

摘　　要： 射线层析与波动方程联合成像是构造和速度同时成像的新思路。由偏移共成像道集算出深度偏差,进而算出速度修正量,把速度修正量按射线路经均匀地分配,由浅入深,逐层修正速度模型;再用修正后的速度作波动方程偏移,抽取共成像道集,算出速度修正量,再将其按射线路经均匀地分配。如此反复进行波动方程偏移和射线法反演迭代,直到共成像道集深度方差满足预设的精度为止,最后得到速度和深度构造同时成像。仿真实验验证了本方法。 In this paper,a simultaneous imaging of the velocity and structure is presented by composition of ray tomography and wave equation.Depth deviation calculation is based on migrated common imaging trace gather,by which the allowance of velocity is gained.This allowance is evenly distributed along ray path from top to bottom layers for modifying the velocity model layer by layer.And the modified velocity is used for wave equation migration to get common imaging trace gather,and calculating a new velocity allowance,and then,evenly distributing along the ray path.Such inversion and iteration of wave equation migration and ray tomography are conducted until the common imaging trace gather depth variance meets the preset accuracy.Finally,the simultaneous imaging of the velocity and depth structure is obtained.This method has been verified by simulation experiment.

关 键 词： 波动方程偏移 共成像道集 射线追踪 速度修正

领　　域： [天文地球] [天文地球]