Changing scale and domain of a petrophysical and elastic properties based log‐ facies classification

Abstract

The aim of this work is to present a methodology for log‐ facies classification integrating petrophysical properties derived from formation evaluation analysis and elastic properties computed through a rock physics model. Furthermore a change of scale and domain of a log‐ facies classification is here presented in order to solve the problem related to reconciling seismic and log scales. The methodology consists of 3 steps: 1) rock physics model calibration and scenarios simulation; 2) log‐ facies classification; 3) histogram upscaling of log facies. The methodology was applied to real log data from a well in the West Africa deep offshore. The results show the improvement of the classification obtained by integrating both elastic and petrophysical data and the coherency of the upscaling of the original log‐ facies from a fine scale in depth domain to a coarse seismic scale in time.