Advanced Monitoring of H 2 S Injection through the Coupling of Reactive Transport Models and Geophysical Responses

Hydrogen sulfide (H S), an environmentally harmful pollutant, is a byproduct of geothermal energy production. To reduce the H S emissions, H S-charged water is injected into the basaltic subsurface, where it mineralizes to iron sulfides. Here, we couple geophysical induced polarization (IP) measurem...

Celý popis

Uloženo v:
Podrobná bibliografie
Vydáno v:Environmental science & technology Ročník 58; číslo 25; s. 11128
Hlavní autoři: Ciraula, Daniel A, Kleine-Marshall, Barbara I, Galeczka, Iwona M, Lévy, Léa
Médium: Journal Article
Jazyk:angličtina
Vydáno: United States 25.06.2024
Témata:
Environmental Monitoring - methods
Hydrogen Sulfide - chemistry
Iceland
Iron - chemistry
Iceland
basalt
mineral storage
wireline logging
hydrogen sulfide
induced polarization
geothermal wastewater
pyrite
ISSN:1520-5851
On-line přístup:Zjistit podrobnosti o přístupu
Tagy: Přidat tag
Žádné tagy, Buďte první, kdo vytvoří štítek k tomuto záznamu!
Popis
Shrnutí:Hydrogen sulfide (H S), an environmentally harmful pollutant, is a byproduct of geothermal energy production. To reduce the H S emissions, H S-charged water is injected into the basaltic subsurface, where it mineralizes to iron sulfides. Here, we couple geophysical induced polarization (IP) measurements in H S injection wells and geochemical reactive transport models (RTM) to monitor the H S storage efforts in the subsurface of Nesjavellir, one of Iceland's most productive geothermal fields. An increase in the IP response after 40 days of injection indicates iron-sulfide formation near the injection well. Likewise, the RTM shows that iron sulfides readily form at circumneutral to alkaline pH conditions, and the iron supply from basalt dissolution limits its formation. Agreement in the trends of the magnitude and distribution of iron-sulfide formation between IP and RTM suggests that coupling the methods can improve the monitoring of H S mineralization by providing insight into the parameters influencing iron-sulfide formation. In particular, accurate fluid flow parameters in RTMs are critical to validate the predictions of the spatial distribution of subsurface iron-sulfide formation over time obtained through IP observations. This work establishes a foundation for expanding H S sequestration monitoring efforts and a framework for coupling geophysical and geochemical site evaluations in environmental studies.
ISSN:1520-5851
DOI:10.1021/acs.est.3c10139