Soil gas analysis and helium fluxes to trace leak paths at UGS Diadema - Argentina. Preliminary report
Monitoring of Diadema UGS, which is located in a depleted natural gas field, was carried out with different tools, which allow for an adequate control of operating activities. Diadema's monitoring activities included several campaigns of gas isotopic analysis. The activities included a pilot te...
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2014
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07365721_v3_nJanuary_p2571_Rodriguez http://hdl.handle.net/20.500.12110/paper_07365721_v3_nJanuary_p2571_Rodriguez |
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| Sumario: | Monitoring of Diadema UGS, which is located in a depleted natural gas field, was carried out with different tools, which allow for an adequate control of operating activities. Diadema's monitoring activities included several campaigns of gas isotopic analysis. The activities included a pilot test using soil gas surveys. The ability of these techniques to trace likely migration paths for the gas stored into the reservoir, i.e., methane, T-VOC, CO<inf>2</inf> concentrations, helium, radon and thoron fluxe, was tested. Isotopic and geochemical analyses indicated that, for the time being, there is no evidence of natural gas migration from Diadema UGS to the overlying aquifers in the Patagonia and Rio Chico Formations. Significant anomalies in helium, radon, thoron fluxes and CO<inf>2</inf> concentration were detected in the fault zones of the Diadema field, and significant methane anomalies at the location of wells (associated with pipeline leaks). T-VOC was not conclusive. This is an abstract of a paper presented at the International Gas Union Research Conference (IGRC 2014) (Copenhagen, Denmark 9/17-19/2014). |
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