Abstract

The present study demonstrates a methodology of computing water saturation in virgin zone using NMR data in conjunction with nuclear logs only. Water saturation for case of virgin saturations restored near sand-face, and when the case it is not so, has been computed, to aid realistic water saturation modeling. The paper demonstrates viability of technique using actual well data as a case study from East Coast deep water well in India. The technique has potential for obtaining , likely free water level even when the same is not penetrated by a well, when petrophysical data from regular suite of logs is integrated with NMR analysis results in detail in the paper.