Borehole image log analysis for sedimentary environment and clay volume interpretation

Abstract

Primarily, the Fullbore Formation MicroImager (FMI) log of a case well was used to interpret the sedimentary environment of a reservoir rock. In this study independent FMI interpretation was integrated with conventional log interpretation to analyze the reservoir facies, bedding geometry and sedimentary environment. Secondly, the focus was put to highlight information potential of the image logs. The quantitative analysis of the FMI log was carried out to demonstrate the capability of this log in shale volume and net to gross calculation of thinly laminated reservoirs where the other logs may not be able to distinguish shale and sands properly.