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Characterizing complex slope channel reservoirs applying Extended Elastic Impedance, Saffron gas field, offshore Nile Delta, Egypt
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  • Adel A. A. Othman,
  • Farouk Ibrahim Metwally,
  • Mohamed F. M. Ali,
  • Ahmed Saied Ali
Adel A. A. Othman
Al-Azhar University
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Farouk Ibrahim Metwally
Helwan university
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Mohamed F. M. Ali
Al-Azhar university
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Ahmed Saied Ali
Qarun Petroleum Company

Corresponding Author:aali_13@hotmail.com

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In a complex reservoir with such a significant degree of heterogeneity, it’s a demand to characterize the reservoir using different seismic attributes based on the available data within certain time constraints. Pre-stack seismic inversion and Amplitude variation with offset (AVO) are among those techniques which give excellent results in particular for the gas bearing clastic reservoirs delineation because of the remarkable contrast between the latter and the surrounded rocks. However, challenges arise of data shortage in seismic and /or well data may obstacle applying these techniques. Moreover, if the prediction of water saturation (Sw) is needed using the seismic data, it represents a serious challenge because of the independent nonlinear relationship between water saturation and seismic attributes and inversion products. Prediction of water saturation is necessary not only for characterizing pay from non-pay reservoirs but for the economics also. Therefore, Extended Elastic Impedance has been performed to produce a 3D volume of water saturation over the reservoir interval then, 3D Sweetness volume was used in order to grasp the geometry of the sand bodies that have been charged with gas in addition to its internal architecture which could illustrate the different stages in the evolution of the Saffron channel system and the sand bodies distribution both vertically and spatially consequently increase the production and decrease the development risk.