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Characterizing groundwater flow and heat transport in fractured rock using fiber‐optic distributed temperature sensing


Authors: Read, T.
Owners: CTEMPs OSU-UNR
Resource type:Composite Resource
Created:Apr 01, 2018 at 5:18 p.m.
Last updated: Apr 09, 2018 at 6:54 p.m. by CTEMPs OSU-UNR

Abstract

We show how fully distributed space‐time measurements with Fiber‐Optic Distributed Temperature Sensing (FO‐DTS) can be used to investigate groundwater flow and heat transport in fractured media. Heat injection experiments are combined with temperature measurements along fiber‐optic cables installed in boreholes. Thermal dilution tests are shown to enable detection of cross‐flowing fractures and quantification of the cross flow rate. A cross borehole thermal tracer test is then analyzed to identify fracture zones that are in hydraulic connection between boreholes and to estimate spatially distributed temperature breakthrough in each fracture zone. This provides a significant improvement compared to classical tracer tests, for which concentration data are usually integrated over the whole abstraction borehole. However, despite providing some complementary results, we find that the main contributive fracture for heat transport is different to that for a solute tracer.

Raw project data is available by contacting ctemps@unr.edu

Subject Keywords

DTS,borehole,cross flow,groundwater,CTEMPs

How to cite

Read, T. (2018). Characterizing groundwater flow and heat transport in fractured rock using fiber‐optic distributed temperature sensing, HydroShare, http://www.hydroshare.org/resource/365e3c925afe422ead906525aa812b06

This resource is shared under the Creative Commons Attribution CC BY.

 http://creativecommons.org/licenses/by/4.0/
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Authors

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Name Organization Address Phone Author Identifiers
Read, T.

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