Advancing Petrophysical Property Estimation through Geophysical Techniques

Abstract This study focuses on developing field-applicable equations that translate spectral induced polarization (SIP) signals to petrophysical properties, with experimental insights gained from laboratory measurements. The objective is to advance non-invasive methods for estimating key properties, such as porosity and permeability, across various rock types, which are applicable in hydrogeology, mineral and fossil fuel exploration, and management. The study involves controlled laboratory measurements using SIP and conventional petrophysical methods on core samples representing a range of typical subsurface media. These measurements are compared to known petrophysical properties to calibrate and assess the reliability of SIP-based equations. A specific focus is on examining the combined use of SIP and traditional petrophysical measurements, aiming to refine existing empirical relationships for porosity and permeability estimations, and assessing their applicability across various rock types. Laboratory measurements reveal that SIP effectively captures variations across diverse rock types, indicating a robust potential for broader applicability. However, permeability estimations remain challenging due to the influence of complex pore structures. Preliminary results show that incorporating traditional petrophysical methods enhances the accuracy of permeability estimates in heterogeneous rocks. The synergy between SIP and other petrophysical measurements provides a more comprehensive view of subsurface properties, highlighting how integrated measurements can improve property estimation in laboratory settings.