基于指数型聚焦稳定器的大地电磁测深反演

Magnetotelluric Inversion Based on Exponential Focused Stabilizer

相对于传统的光滑反演,聚焦反演可以突出地质体的尖锐边界。此外,指数型聚焦稳定器受聚焦因子(在聚焦类稳定器中普遍存在)影响较小,但这种新型的稳定器只在重磁反演中得以实现。基于此,尝试将这种新型的聚焦器引入到大地电磁测深(MT)反演中。模型试验表明基于指数型聚焦稳定器的反演结果可以有效地突出电阻率异常体的边界,指数型聚焦稳定器适用于MT反演且具有推广至其他地球物理方法聚焦反演的潜质。

Compared with traditional smooth inversions, focusing inversions can highlight sharp boundaries of geology bodies. In addition, the exponential focused stabilizer which realized only in gravity and magnetic inversions, is less affected by the focusing factor(commonly exists in focused stabilizers). Based on this, we attempt to introduce the new focusing stabilizer into MT inversions.Model tests show that the inversed results based on exponential focusing stabilizer can effectively highlight boundaries of resistivity anomalous bodies, and the exponential focusing stabilizer is applicable to MT inversion and has the potential to be extended to other geophysical methods.