基于程函方程的克希霍夫全平面域偏移成像方法  

Kirchhoff full plane imaging method based on Eikonal equation

作　　者：智敏 朱建刚 ZHI Min;ZHU Jian-Gang(Xi'an Research Institute of China Coal Technology&Engineering Group,Xi'an 710077,China)

机构地区：[1]中煤科工集团西安研究院有限公司,陕西西安710077

出　　处：《物探与化探》2020年第4期756-762,共7页Geophysical and Geochemical Exploration

基　　金：国家重点研发计划课题“井下随掘巷道地质异常体动态探测技术与装备”(2018YFC0807804);贵州省科技重大专项“薄煤层无人/少人采掘系统研究与应用示范”([2018]3003⁃1)。

摘　　要：本文分别以直射线和弯曲射线初至波层析反演技术重建的速度为偏移速度,采用波前扩展外推方式求解程函方程,求取了成像区域内各节点初至波时间场,应用克希霍夫积分偏移技术对复杂模型叠前数据进行全平面偏移成像,成像结果表明:弯曲射线层析反演方法获得的速度场较直射线层析结果对速度异常体的刻画更准确,以弯曲射线层析反演速度场作为偏移速度可以获得较好的偏移成像结果。In this paper,the first arrival wave time field of imaging area is obtained by solving the Eikonal equation by using wavefront expansion extrapolation method.The full plane migration imaging of prestack data of complex model is performed by using Kirchhoff integral migration technique.The imaging results show that the inversion method of curve ray tomography describes the anomaly velocity body more accurately than straight ray tomography result.Better migration imaging results can be obtained by using the velocity field inverted by curved ray tomography.

关 键 词：程函方程 克希霍夫积分法 全平面偏移成像 弯曲射线层析反演 直射线层析反演 

分 类 号：P631.4[天文地球—地质矿产勘探]