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.
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)
出处
《物探与化探》
CAS
北大核心
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)。
