An inversion model applied to DC soundings interpretation

Annals of Geophysics 01/2010;
Source: DOAJ


The inversion technique is used in DC soundings intepretation to determine thethicknesses and the true resistivities of the layers, starting from the field apparentresistivities.The relationship between the predicted apparent resistivities and the earthparameters is not linear. Starting from this relationship a methodology is describedto obtain a wellposed system of M linear equations. This system permits tocalculate, by means of an iterative procedure, the earth parameters that minimizethe differencies (error) between the field and the predicted apparent resistivities.Three different iterative procedures are described. Practical examples haveshown that all the iterative procedures are reliable and give comparable results interms of minimum error reached and CPU time.

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