Novel Multidimensional Tracers for Geothermal Inter-Well Diagnostics

Abstract

This is the Final Report of the three-year project “Novel Multidimensional Tracers for Geothermal Inter-Well Diagnostics” (DE-EE00003032, April 1, 2010 – March 30, 2013), in which we present our major accomplishments with detailed descriptions of our experimental and theoretical efforts. Upon the successful conduction of this project, we have followed our proposed breakdown work structure completing most of the technical tasks. Finally, we have developed and demonstrated the matrix of smart geothermal tracers and the corresponding interpretation tools together with the novel pre-concentration technique – the Hollow Fiber Liquid-Liquid Micro-Extraction (HFLLME), which present superior performance in terms of the ultralow detection limits (up to 10-12g/mL with signal-to-noise ratio of 2); high workable temperature up to 300°C; and the significant enhancement in the characterization of subsurface environment. We have developed in- depth mechanistic understandings on the complicated chemistry involved in the tracer- matrix interaction as well as developed the unique yet effective experimental protocols (screening methodologies, analytical tools, pre-concentration and derivatization techniques) for achieving a highly efficient yet economically feasible and environmentally friendly geothermal tracer system. The most important findings have been reported to DOE in this Final Report and our 12 Quarterly Reports.