A Review of the Hydrochemistry of a Deep Sedimentary Aquifer and Its Consequences for Geothermal Operation: Klaipeda, Lithuania
Joint Authors
Burnside, Neil M.
Brehme, Maren
Nowak, Kerstin
Banks, David
Petrauskas, Sigitas
Valickas, Robertas
Bauer, Klaus
Boyce, Adrian
Source
Issue
Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-20, 20 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2019-04-09
Country of Publication
Egypt
No. of Pages
20
Main Subjects
Abstract EN
The Klaipeda Geothermal Demonstration Plant (KGDP), Lithuania, exploits a hypersaline sodium-chloride (salinity c.
90 g/L) groundwater from a 1100 m deep Devonian sandstone/siltstone reservoir.
The hydrogen and oxygen stable isotope composition is relatively undepleted (δ18O=c.
-4.5‰), while the δ34S is relatively “heavy” at +18.9‰.
Hydrochemical and isotopic data support the existing hypothesis that the groundwater is dominated by a hypersaline brine derived from evapoconcentrated seawater, modified by water-rock interaction and admixed with smaller quantities of more recent glacial meltwater and/or interglacial recharge.
The injectivity of the two injection boreholes has declined dramatically during the operational lifetime of the KGDP.
Initially, precipitation of crystalline gypsum led to a program of rehabilitation and the introduction of sodium polyphosphonate dosing of the abstracted brine, which has prevented visible gypsum precipitation but has failed to halt the injectivity decline.
While physical or bacteriological causes of clogging are plausible, evidence suggests that chemical causes cannot be excluded.
Gypsum and barite precipitation could still occur in the formation, as could clogging with iron/manganese oxyhydroxides.
One can also speculate that inhibitor dosing could cause clogging of pore throats with needles of calcium polyphosphonate precipitate.
American Psychological Association (APA)
Brehme, Maren& Nowak, Kerstin& Banks, David& Petrauskas, Sigitas& Valickas, Robertas& Bauer, Klaus…[et al.]. 2019. A Review of the Hydrochemistry of a Deep Sedimentary Aquifer and Its Consequences for Geothermal Operation: Klaipeda, Lithuania. Geofluids،Vol. 2019, no. 2019, pp.1-20.
https://search.emarefa.net/detail/BIM-1153325
Modern Language Association (MLA)
Brehme, Maren…[et al.]. A Review of the Hydrochemistry of a Deep Sedimentary Aquifer and Its Consequences for Geothermal Operation: Klaipeda, Lithuania. Geofluids No. 2019 (2019), pp.1-20.
https://search.emarefa.net/detail/BIM-1153325
American Medical Association (AMA)
Brehme, Maren& Nowak, Kerstin& Banks, David& Petrauskas, Sigitas& Valickas, Robertas& Bauer, Klaus…[et al.]. A Review of the Hydrochemistry of a Deep Sedimentary Aquifer and Its Consequences for Geothermal Operation: Klaipeda, Lithuania. Geofluids. 2019. Vol. 2019, no. 2019, pp.1-20.
https://search.emarefa.net/detail/BIM-1153325
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1153325