在物探数据处理与解释过程中,反演的多解性大大增加了解释的难度,严重影响到计算结果的可靠性与准确性。可靠性并非指只满足于模型体计算出的理论异常与观测异常的“拟合”好坏,还要考虑得到的模型体与实际地质体的“符合程度”。如何满足上述要求,降低多解性达到高精度的处理与解释,成为选择反演方法的一大主要因素。目前等效源反演成像理论在重、磁领域的应用已经取得了一定的进展,为了证明该方法在时间域激发极化法中同样适用,这里设计了三个高阻球体模型,根据其计算出的理论异常值进行反演成像,并结合实际资料进行计算与处理,基本能够确定出场源体的空间位置、大小、形状,从理论与实际应用效果两方面证明了该方法的可信性和准确性。
In the process of geophysical data processing and interpretation,inversion multiple solution greatly increases the difficulty of interpretation and seriously affect the reliability and accuracy of the results.Reliability not only means the degree of the "fit" between theoretical anomaly and observed anomaly,but also consider the"consistent"of the model body with the ac-tual geological body.How to meet the above requirements and reduce multiple solutions to improve the accuracy of the process-ing and interpretation becomes one of the main factors to choose the inversion methods.Currently,the equivalent source inver-sion imaging theory in gravity and magnetic fields has made some progress.In order to prove that the method in the time do-main induced polarization method is also applicable,I designed three impedance sphere models,and based on the theoretical a-nomaly values to do inversion imaging.Then,combined with the actual data,I carried on the calculation and processing.We can roughly determine the spatial location,the size and the shape of the source body.It proved the credibility and accuracy of the method from the theory and practical application.