中文摘要：

针对石油勘探中常常遇到大块具有均匀电导率的地质单元被高陡边界分割的情况，传统的光滑反演各具特色但均有边界位置模糊的缺点，而陡边界反演方法可以有效地克服这种缺点．本文从应用的角度出发，对陡边界反演方法的原理作了详细的介绍，并应用该反演方法对两个块状结构模型的合成数据进行了反演，反演结果的拟合差分别为rms-1．66和rms-1．27，表明该方法反演结果能准确地恢复到真实模型附近；通过对比该方法与快速松弛法在实测数据中的应用，表明该方法有助于提高MT反演分辨率．但是该方法对模型参数设置和所知道的地质信息的准确性要求较高．

英文摘要：

In the case that both a fixed subsurface resistivity and sharp resistivity contrasts between adjacent units exiat, which is often encountered in petroleum exploration, the conventional smooth inversion methods possess their own advantages but also have the disadvantages of boundary location blurring. While sharp boundary Inversion （SBI） can overcome the disadvantages of these smooth inversions. In this paper, the principle of SBI is introduced in details, and it is tested for two synthetic models. The misfits of the inversion results for the two synthetic models are rms 1. 66 and rms 1.27 separately. This indicates that the models can be recovered well by the method. The comparison between SBI and rapid relax inversion （RRI） to real data indicates that SBI can enhance MT inversion＇s resolution and can recover model＇s boundary location more accurately. But SBI is highly dependent on model parameterization and the accuracy and availability of the prior geological information.