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Fracture Characterization
Citation:
Bothner, W., J. Benoit, F. Birch, M. Mills, S. Sadkowski, AND R. Davis. Fracture Characterization. U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-10/010, 2010.
Impact/Purpose:
The purpose is to compare and assess various techniques for understanding fracture patterns
Description:
The goal of this volume is to compare and assess various techniques for understanding fracture patterns at a site at Pease International Tradeport, NH, and to give an overview of the site as a whole. Techniques included are: core logging, geophysical logging, radar studies, and drilling parameter recorder. All boreholes were logged geophysically. For most, this included a full package of contracted standard geophysical logging tools: video, optical and acoustic televiewer, fluid temperature/resistivity probe, gamma/caliper/spontaneous potential probe, heat pulse flow-meter, and full-waveform sonics (for BBC5 only). A combination of lithologic and geophysical logging tools, particularly optical and acoustic televiewer records, are found to clarify the character and orientation of subsurface fractures. The latter are critical in the evaluation of possible interconnectivity between adjacent boreholes. Borehole radar and DPR provided coarser control on estimates of hydraulic conductivity among families of fractures.