Measurement and simulation of heat exchange in fractured bedrock using inert and thermally degrading tracers
Multicomponent groundwater tracer tests were conducted in a well-characterized field site in Altona, NY using inert carbon-cored nanoparticles and a thermally degrading phenolic compound. Experiments were conducted in a mesoscale reservoir consisting of a single subhorizontal bedding plane fracture located 7.6 m below ground surface contained between two wells separated by 14.1 m. The reservoir rock, initially at 11.78C, was heated using 748C water. During the heating process, a series of tracer tests using thermally degrading tracers were used to characterize the progressive in situ heating of the fracture. Fiber-Optic Distributed Temperature Sensing (FODTS) was used to measure temperature rise orthogonal to the fracture surface at 10 locations. Recovery of the thermally degrading tracer’s product was increased as the reservoir was progressively heated indicating that the advancement of the thermal front was proportional to the mass fraction of the thermally degrading tracer recovered. Both GPR imaging and FODTS measurements reveal that flow was reduced to a narrow channel which directly connected the two wells and led to rapid thermal breakthrough. Computational modeling of inert tracer and heat transport in a two-dimensional discrete fracture demonstrate that subsurface characterization using inert tracers alone could not uniquely characterize the Altona field site. However, the inclusion of a thermally degrading tracer may permit accurate subsurface temperature monitoring. At the Altona field site, however, fluid-rock interactions appear to have increased reaction rates relative to laboratory-based measurements made in the absence of rock surfaces.
- Research Organization:
- California State Univ. (CalState), Long Beach, CA (United States); Cornell Univ., Ithaca, NY (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Geothermal Technologies Office
- Grant/Contract Number:
- EE0002767; EE0006764
- OSTI ID:
- 1532996
- Journal Information:
- Water Resources Research, Vol. 53, Issue 2; ISSN 0043-1397
- Publisher:
- American Geophysical Union (AGU)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Solute tracer test quantification of the effects of hot water injection into hydraulically stimulated crystalline rock
|
journal | June 2020 |
Solute tracer test quantification of the effects of hot water injection into hydraulically stimulated crystalline rock
|
text | January 2020 |
Solute Reactive Tracers for Hydrogeological Applications: A Short Review and Future Prospects
|
journal | February 2020 |
Similar Records
Recover Act. Verification of Geothermal Tracer Methods in Highly Constrained Field Experiments
Predictive Inverse Model for Advective Heat Transfer in a Short–Circuited Fracture: Dimensional Analysis, Machine Learning, and Field Demonstration