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三维电阻率探测存在反演多解性问题,易造成地质解译困难甚至判断错误。针对该问题,提出将多种地球物理探测手段获得的已知信息构建为参考模型约束施加到电阻率反演方程中的解决思路。以地质钻探获得介质电阻率信息,以地质雷达法获得异常体界面信息,将得到的已知信息映射到三维电阻率反演得到参考模型,在电阻率反演中施加参考模型约束,形成了基于参考模型的三维电阻率约束反演方法,其中携带有已知先验信息的参考模型约束,具有定向引导电阻率反演方向的作用,理论上有助于压制反演多解性。开展相应的数值试验和工程应用,结果表明上述电阻率反演方法实现了对异常体形态、规模、电阻率值等的较好反映,是实现多元地球物理探测信息融合、压制多解性的一条可行途径。
Three-dimensional resistivity detection inversion multi-solution problems, easy to cause geological interpretation difficult or even wrong. In order to solve this problem, this paper proposes that the known information obtained by many kinds of geophysical exploration methods should be used as the reference model to solve the resistivity inversion equation. Geological drilling is used to obtain the medium resistivity information, and the geologic radar method is used to obtain the information of the abnormal body interface. The obtained known information is mapped to the three-dimensional resistivity inversion to obtain a reference model, and the reference model constraint is applied to the resistivity inversion. The three-dimensional resistivity constrained inversion method of the reference model, which carries the reference model constraints with known prior information, has the function of directional inversion of the resistivity inversion direction and is theoretically helpful for the suppression inversion inversion multi-solution. The corresponding numerical experiments and engineering applications are carried out. The results show that the resistivity inversion method described above can better reflect the shape, scale and resistivity of abnormal bodies, and it is also a multi-geophysical exploration information fusion and multi-solution Feasible way.