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

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.