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Proc. IAHS, 379, 181-186, 2018
https://doi.org/10.5194/piahs-379-181-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Pre-conference publication
05 Jun 2018
Horizontal insulating barriers as a way to protect groundwater
Renata Cicha-Szot1, Krzysztof Labus2, Sławomir Falkowicz1, and Norbert Madetko3 1Oil and Gas Institute – National Research Institute, Department of Petroleum Engineering, Kraków 30-001, Poland
2Silesian University of Technology, Department of Applied Geology, Gliwice, 44-100, Poland
3Soley LCC, Balice, 32-083, Poland
Abstract. Trenchless Technology of Forming Horizontal Insulating Barriers (TFHB) can be considered a method of groundwater protection against inflow of pollutants. In TFHB technology, the working fluid (sodium silicate solution) and the gelling agent (CO2) are injected separately, using one tool, to different zones of the aquifer profile. Carbon dioxide injected into the saturation zone rises due to buoyancy forces and reaches the silicate which was injected at the water table level. This initiates the process of silicate gelation, resulting in the formation of an insulating barrier. For technological purposes, the gelation time must be controlled, and the resulting gel must have certain mechanical properties. In order to apply THFB in real conditions it was necessary to identify important technological and technical parameters, as well as to define interactions between the injected fluid and the aquifer rocks. Geochemical modelling (equilibrium, reaction path and reactive transport) was used to identify potential geochemical effects of the application of TFHB in sandy aquifers. Certain petrophysical parameters and mineralogical assemblages of aquifers were addressed, taking into account both low and strongly mineralized groundwater. The simulations revealed that TFHB does not have a negative impact on the chemistry of rock-water systems described in this work.
Citation: Cicha-Szot, R., Labus, K., Falkowicz, S., and Madetko, N.: Horizontal insulating barriers as a way to protect groundwater, Proc. IAHS, 379, 181-186, https://doi.org/10.5194/piahs-379-181-2018, 2018.
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Short summary
Trenchless Technology of Forming Horizontal Insulating Barriers (TFHB) can be considered a method of groundwater protection against inflow of pollutants. In order to apply THFB in real conditions it was necessary to identify important technological and technical parameters, as well as to define interactions between the injected fluid and the aquifer rocks. The paper presents results of geochemical modelling of the application of TFHB in sandy aquifers.
Trenchless Technology of Forming Horizontal Insulating Barriers (TFHB) can be considered a...
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