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Surface geochemical measurements applied to monitoring, verification, and accounting of leakage from sequestration projects

Ronald W. Klusman
Surface geochemical measurements applied to monitoring, verification, and accounting of leakage from sequestration projects (in CO (sub 2) storage and utilization, Charlotte Sullivan (prefacer), Alain Bonneville (prefacer), William Harbert (prefacer), Neeraj Gupta (prefacer), Dirk Nieuwland (prefacer) and Joseph Morris (prefacer))
Interpretation (Tulsa) (May 2015) 3 (2): SM1-SM21

Abstract

A detailed study of CO (sub 2) and CH (sub 4) surface fluxes, shallow soil gas composition, 10-m hole soil gas composition was made at Rangely, Colorado, Teapot Dome, Wyoming, USA, and the results of geochemical verification measurements at Weyburn, Saskatchewan, Canada. Summer and winter soil gas and gas flux measurements were made at Rangely, and winter only at Teapot Dome. The objectives were to determine if leakage of CO (sub 2) and/or CH (sub 4) could be detected in the overpressured Rangely and the underpressured Teapot Dome systems. At Weyburn, the objective was the determination of the presence or absence of an alleged leak. Seasonal surface CO (sub 2) fluxes at Rangely were similar at on-field locations and an off-field control area. Methane fluxes were much higher at on-field locations than in the control area, suggesting a reservoir source. Seasonal differences in CH (sub 4) fluxes suggested methanotrophic oxidation was occurring in the soils. Shallow soil gas concentration measurements of CO (sub 2) were similar at a 100-cm depth, on-field and in the control area. Methane soil gas concentrations were higher on-field than in the control area; summer and winter. These data were used to select locations with and without evidence for seepage allowing nested sampling up to a 10-m depth. More complex chemical and isotopic measurements were made in 10-m holes at Rangely and Teapot Dome. Methanotrophy was operational at the active Rangely and the passive Teapot Dome systems. A small methane leakage rate of 400-700 tonnes year (super -1) and CO (sub 2) of < 170 tonnes year (super -1) were determined at Rangely, and rates near zero at Teapot Dome. Inert gases, carbon-containing gases, as well as isotopic ratios supported the presence of pathways at geochemically anomalous locations at Teapot Dome. Measurements of soil gas and inert gas isotopes in shallow groundwater by other authors at Weyburn, Saskatchewan, found no evidence of leakage.


ISSN: 2324-8858
EISSN: 2324-8866
Serial Title: Interpretation (Tulsa)
Serial Volume: 3
Serial Issue: 2
Title: Surface geochemical measurements applied to monitoring, verification, and accounting of leakage from sequestration projects
Title: CO (sub 2) storage and utilization
Author(s): Klusman, Ronald W.
Author(s): Sullivan, Charlotteprefacer
Author(s): Bonneville, Alainprefacer
Author(s): Harbert, Williamprefacer
Author(s): Gupta, Neerajprefacer
Author(s): Nieuwland, Dirkprefacer
Author(s): Morris, Josephprefacer
Affiliation: Colorado School of Mines, Golden, CO, United States
Affiliation: Pacific Northwest National Laboratory, Richland, WA, United States
Pages: SM1-SM21
Published: 201505
Text Language: English
Publisher: Society of Exploration Geophysicists, Tulsa, OK, United States
References: 65
Accession Number: 2015-073923
Categories: Geochemistry of rocks, soils, and sediments
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 5 tables
N40°04'00" - N40°04'00", W108°47'60" - W108°47'60"
Secondary Affiliation: University of Pittsburgh, USA, United StatesBattelle Memorial Institute, USA, United StatesNewTec Environmental Services, NLD, NetherlandsLawrence Livermore National Laboratory, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by Society of Exploration Geophysicists, Tulsa, OK, United States
Update Code: 201532
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