Porosity and permeability images based on crosswell seismic measurements integrated with FMI logs at the Port Mayaca aquifer, South Florida

摘要

High-resolution seismic impedance delineated the upper confining unit contact intercepted by wells MF-37 and EXPM-1 at depths of 750 and 790 ft, respectively. This impedance image captures the variability of the soft and stiff zones in the interwell region. The impedance data with permeability and porosity well logs allow the generation of porosity and permeability images in the interwell region. These images visualize the flow units of high water production and low-rnpermeable zones or permeability barriers. On the other hand, FMI images provide information on the secondary porosity distribution at the borehole scale not detected with any other log. The sequences of conductive and resistive bands captured by the FMI images are in the stiff zones of the aquifer. The combined interpretation of FMI and crosswell images allows an improved understanding as to the origin of the high-permeability spikes developed near the well that are not significant conduits.