Publications

In reservoir characterization, porosity and water saturation (Sw) are critical parameters for identifying lithology and reservoir fluid distribution. These parameters are typically derived from seismic properties such as acoustic impedance (AI) and Vp/Vs through transformation techniques. This study focuses on the Plover Formation in the Poseidon Field, Australia, a sandstone reservoir characterized by heterogeneity in lithology, pore structure and fluid distribution, which poses challenges for mapping petrophysical properties (porosity and Sw). To address this, we employ the PEI method, a non-linear approach that conceptually links AI and Vp/Vs to porosity and water saturation (Sw), thereby improving characterization accuracy. The steps taken include PEI modeling analysis, where the working principle of PEI models two things, namely the porosity approximation by Pseudo Elastic Impedance for Lithology (PEIL), while the water saturation (Sw) value is approximated by Curved Pseudo Elastic Impedance (CPEI). From the modeling results, it was found that the correlation between porosity and PEIL was 0.970 and CPEI to water saturation was 0.844, which provides a very good correlation. The cube-slice results of porosity and water saturation in the Plover Formation can effectively distinguish target zones from non-target areas within the Plover Formation, significantly enhancing the interpretation accuracy. Based on the studies obtained in this research, we suggest that the PEI technique could be effectively applied to oil and gas fields in Indonesia, contributing to more accurate reservoir characterization in complex geological settings.