Schlumberger

Industry Article: Finding Bypassed Pay in Complex Channel Sands

Publication: First Break
Publication Date: 10/01/2009

Understanding and predicting fluid movements in the reservoir is the key to successful reservoir management. While oilfields worldwide are becoming more and more mature, operators seek technologies to increase recovery.

This paper discusses crosswell electromagnetics (EM), which enables monitoring fluid movements at a reservoir scale by measuring resistivity distribution in between wells. Resistivity variations are seen when changes in porosity (subsidence), saturation (water flooding, bypassed pay), and temperature (steam flooding) occur. While crosswell EM development started two decades ago, it is only today with advances in processing and inversion techniques, and by following rigorous workflows that it is available for oilfield applications on a commercial basis.




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