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总结和分析了大地电磁场成像技术的研究现状 ,在Zhdanov等对偏移电磁场的研究和成像技术基础上 ,提出了改进的有限差分法大地电磁场偏移成像技术 ,使差分方程精度和成像分辨率有了明显的提高 ,将前人大地电磁场偏移成像的模型试验研究推进到适用于复杂地电模型和实际资料处理解释的阶段 ,并通过松辽盆地大地电磁测深资料的偏移成像处理和解释展示了该方法的有效性和实用性。
Based on the research and imaging technology of offset electromagnetic field by Zhdanov et al., An improved Finite Difference Method (DEMT) imaging technique for geomagnetic EMF is proposed. The precision of the differential equation and the resolution of imaging are The model test of migration imaging of the former earth magnetotelluric is advanced to the stage suitable for complex geoelectric model and actual data processing and interpretation and is processed and explained by the offset imaging of the magnetotelluric data of the Songliao Basin The effectiveness and practicability of this method are demonstrated.