Abstract-The main goal of this paper is to use the wavelet transform modulus maxima lines (WTMM) and the detrended fluctuations analysis (DFA) methods to establish a new technique of lithofacies segmentation from well logs data. The WTMM is used to delimitate lithoafacies boundaries and the DFA is used to provide an exact estimation of the roughness coefficient of lithofacies. Application of the proposed idea at the synthetic and real data of a borehole located in Berkine basin shows that the proposed technique can enhance reservoirs characterization.

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The main goal of this paper is to use the 2-D continuous wavelet transform (CWT) combined with the 3-D analytic signal (AS) for structural boundaries delimitation from aeromagnetic data. The basic idea is based on the mapping of the maxima of the modulus of the 2-D CWT of the amplitude of the 3-D analytic signal (AS) for the full range of scales used to calculate the 2-D CWT. The proposed idea is applied to the synthetic data of a prism and a cylinder; obtained results show the power of this technique for contacts mapping in cases of high vector magnetization direction. Obtained results of the application to real aeromagnetic data of In Ouzzal area located in the west of Hoggar (Algeria) are compared with the 3-D analytic signal solutions. They show robustness of the proposed tool for pattern recognition of structural boundaries from potential geomagnetic data.

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