井地地震CT成像数值模拟研究与应用  

Study of numerical simulation and application on well-ground seismic Tomography

作　　者：胡明顺[1] 潘冬明[1] 李兵[2] 李娟娟[1] 李红立[3] 

机构地区：[1]中国矿业大学资源与地球科学学院,徐州221008 [2]中国科学院兰州地质研究所,兰州730000 [3]广州地铁设计研究院,广州510010

出　　处：《地球物理学进展》2009年第4期1399-1404,共6页Progress in Geophysics

基　　金：国家自然科学基金项目(40574058);国家重大专项(2008ZX05035)资助

摘　　要：由井地地震CT成像原理决定,其在提高生产效率、降低生产成本和扩大勘察范围上具有突出优势.本文针对井地观测系统,重点通过对ART和SIRT重建方法进行数值模拟对比研究,分析得出二者在井地地震CT应用中的优缺点及适用条件,提出了如何提高影响成像质量的射线分布密度、均匀性和正交性.最后选择收敛快速稳定的SIRT算法应用于实际,取得良好的生产效果,很好的验证了井地CT成像技术的正确性,可行性和实用性.The principle of Well_Ground seismic CT determines that it has the advantages such as higher producing efficiency,lower producing cost and broader exploring areas. This paperfocuses on the well-ground geometry, the relative merits and application conditions between ART and SIRT, and suggests how to enhance the ray density, homogeneity and orthogonality by numerical simulations. Finally, the SIRT which has highest convergence rate is chosen for real work and a good result is obtained. So it proofs that the well ground seismic CT has the correctness, feasibility and practicability.

关 键 词：井地地震 图像重建 反投影重建 代数重建 联合迭代重建 

分 类 号：P631[天文地球—地质矿产勘探]