oa Wavelet Transform Modulus Maxima Lines Analysis of Seismic Data for Delineating Reservoir Fluids

The main goal of the proposed idea is to use the wavelet transform modulus maxima lines (WTMM)<br>method to delineate reservoir fluids. First a seismic seismogram is generated using the convolution of<br>the Ricker wavelet with the reflectivity function calculated from the measured sonic and density well logs data.<br>Obtained seismogram is analyzed by the WTMM in order to calculate the singularities spectrum based<br>on the direct Legendre transform of the spectrum of exponents.<br>Application of this technique at the real data of a borehole located in the Algerian Sahara is realized.<br>Thus Singularities spectrum is estimated at corresponding depth of the following fluid types: Gas, Oil,<br>Water, Gas-Oil and Oil-Water. Consequently, the obtained results allow taking a decision about the<br>fluid nature containing the reservoirs rocks pores.<br>We have applied the proposed technique at two other boreholes, obtained results demonstrate that the<br>wavelet transform modulus maxima lines technique can give more idea about hydrocarbon nature and<br>can enhance reservoir characterization.<br>Keywords: WTMM , seismic seismogram, well logs, singularities Spectrum, hydrocarbon nature.