磁异常化极效果的研究

Research of Reduction to the Pole of Magnetic Anomaly

在磁法数据的三维反演中,异常解释的磁异常化极法在实际运用中得到了广泛的应用。但是,化极后是否可以提高磁异常的准确性还有待研究。运用对化极后的磁异常数据进行三维反演的方法,对局部磁异常进行磁法反演;反演的结果与未进行化极的磁异常数据的三维反演结果进行对比,表明化极后的反演结果更接近异常体模型;同时运用三维可视化技术,建立3D地球物理模型。

In the 3D magnetic inversion,the reduction to pole of magnetic anomaly in anomaly interpretation which is an effective method has widely applied. But the reduction to pole whether there will be improving the accuracy of magnetic anomalies remains to be studied. Using the reduction to the pole of the magnetic anomalies in 3D magnetic inversion,which is comparing with the no-reduction-to-pole of 3D magnetic inversion,the study shows that former one is closer to the abnormal body model. Meanwhile,the 3D visualization technology can used to set 3D geophysical model.