Over the past two decades, numerous qualitative and quantitative approaches have been introduced and utilized for reservoir characterizations and properties prediction. This includes but not limited to different AVO attributes, AVO inversion techniques, in addition to a variety of rock physics attributes. This study is aimed to perform a reservoir characterization for Plover formation in the Poseidon area in Browse basin using well logs and 3-D seismic data in order better understand reservoirs lithology and fluid distribution. AVO analysis technique incorporated with Rock Physics Templates (RPT), seismic attributes and seismic inversion were utilized to identify location of the gas zones in the targeted formation over the survey area. This was achieved by using cross plots and the analysis of attributes derived from AVO intercept (I), and gradient (G) such as (I*G) and the scaled Poisson's ratio. The analysis of AVO attributes could indicate expressions that have been related to the gas saturated sand. Rock Physics Templates have been generated at the well locations have demonstrated the ability of the elastic properties to differentiate the fluid and the lithology types. Further, prestack seismic inversion was implemented to produce elastic properties volumes such as P-impedance, S-impedance, and Density. These volumes have been used to compute other elastic properties, namely, Vp/Vs, Lamda-Rho, and Mu-Rho for more detailed characterization Seismic attributes supported with the above elastic properties volumes have contributed to a better understanding of the reservoir structure and lithology and more importantly to find some prospective zones that need further investigation.