Late Pliocene Sapphire Sand Reservoirs Characterization Using Nuclear Magnetic Resonance: Sapphire-1 well, Case Study, WDDM, Egypt

This paper documents first deployment of new Magnetic Resonance (NMR) approach for characterizing late-Pliocene complex shaly sandstone reservoirs Sapphire field. Use of conventional logs like Gamma ray, Density, Neutron and Sonic for the reservoir characterization in these reservoirs pose challenges due to its lithological complexity and hetrogenity. The Pliocene delta slope-channel play (Sapphire Field) reservoirs are a shaly sandstone reservoir with vertical and lateral heterogeneous properties. The clay content in such reservoirs causes overestimation of the shale volume and overestimation of the formation porosity leading to inaccurate identification of lithology and estimation of the formation fluids using the conventional logs.