Experimental Evaluation of the Petrophysical Algorithm in an Integrated Flow Model

Abstract

An experimental apparatus was designed to simultaneously measure fluid flow rates and high-frequency (ultrasonic) elastic wave velocities. The measured fluid production and elastic wave velocity data were compared to integrated flow model (IFM) calculations. An IFM is a flow simulator with a petrophysical model that can calculate seismic attributes using reservoir and fluid properties. The petrophysical algorithm is an extension of Gassmann's equation that lets moduli depend on effective pressure, porosity, and clay fraction. A new set of correlation coefficients for the petrophysical algorithm was obtained by matching high-frequency measurements.