Petrophysical parameters estimation using Levenberg-Marquardt and Singular Value Decomposition inversion schemes


  • Abdelrahman Moataz Mohamed Gomaa University of Miskolc, Ain shams University
  • Szabó Norbert Péter University of Miskolc
  • Dobróka Mihály University of Miskolc



Forward modeling, Local inversion, MATLAB, Borehole geophysics


Well logging inversion was carried out using Levenberg-Marquardt (LM) and Singular Value Decomposition (SVD) techniques for the determination of petrophysical parameters, respectively. In this research, synthetic data contaminated with 5% Gaussian noise, and field data were used to compare the results from the two inversion methods. MATLAB software has been developed to solve the overdetermined inverse problem. The estimated petrophysical parameters from both inversion methods had been compared to one another in terms of robustness to noise, rock interface differentiation, different fluid prediction, and the accuracy of the estimated parameters. This research returns the reason to the inner iterative loop which is considered more about the Jacobian matrix sensitivity. The inversion results showed that both methods can be used in petrophysical data estimation for a reliable well-log data interpretation.