We describe a water dispersed nano sensor cocktail based on InP/ZnS quantum dots (QDs) and atomic silver clusters with a bright and visible luminescence combined with optimized sensor functionalities for the water flooding process. The QDs and Ag nano sensors were tested in simulated reservoir conditions (high salinity, Ca2+, pH, high temperature, oil and solids). The nano sensors showed enhanced sensor functionalities towards pH, temperature, sub-terrain chemistry and reservoir solids like clay or calcium carbonate.

Keywords:
upstream oil & gas, nano sensor, sensor functionality, inp zn qd, reservoir characterization, water flooding process, stability, sensor, reservoir conditions, enhanced recovery
Subjects:
Reservoir Characterization, Improved and Enhanced Recovery, Waterflooding
Copyright 2012, Society of Petroleum Engineers
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