A Log Based Method of Determining Dynamic Biot’s Coefficient

This study uses multiple wells with high-quality acoustic and density logs to demonstrate a rock physics workflow for determining dynamic Biots’s coefficient from detailed petrophysical evaluation. One of the important inputs needed for determining dynamic Biots’s coefficient is a detailed interpretation of the rock which has been modeled in this study with a generic stochastic method. In this analysis saturated bulk modulus (Ksat) is assumed to be very close to dry bulk modulus (Kdry) which in unconventional reservoirs, because of the very low porosity, is reasonable. This condition, furthermore, is verified during analysis of the well log curve data.