New approach to simulation and inversion of the electromagnetic logging data in thinlayered collectors
© V.N. Glinskikh, M.I. Epov
An approach for description of the spatial electrical conductivity distribution by continuous functions has been proposed. Based on this approach, the algorithm of approximated twodimensional numerical simulation of electromagnetic logs acquired in media characterized by interstratification of thin sandy and argillaceous beds has been developed. The comparative analysis of synthetic electromagnetic logs has been performed when describing the vertical electrical conductivity distribution by piecewise constant and continuous periodic functions. It has been shown that applying continuous functions allows one to reveal signals with the relative error less than 5%. For more accurate approximation of piecewise constant function by continuous one, the averaged electrical conductivity of a thinbedded medium is proposed to be taken into account. The algorithm of the decision of inverse problem highfrequency electromagnetic logs in thinlayered collectors with use of continuous functions has been developed. The algorithm defines average values of thickness and electrical conductivity. Numerical experiments by definition of the average parameters of a thinly bedded collector are executed with synthetic data. <<back 
