Detailed compositional analysis of gas seepage at the National Carbon Storage Test Site, Teapot Dome, Wyoming, USA

Klusman, Ronald W.

doi:10.1016/j.apgeochem.2006.06.009

Cited by 39 publications

(35 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…presence of ethane and propane) as evidence for microseepage in oil and gas fields, some of which have undergone CO 2 enhanced oil recovery (Klusman 2003a(Klusman , 2006. In this study, however, the preponderance of these anomalies associated with reclaimed mine lands strongly suggests that they originate not from microseepage from a deeper oil or gas reservoir, but rather from the reclamation process as described in the previous paragraph.…”

Section: Shallow Soil Gas Measurementscontrasting

confidence: 44%

Geochemical Analyses of Surface and Shallow Gas Flux and Composition Over a Proposed Carbon Sequestration Site in Eastern Kentucky

Parris¹,

Solis²,

Takacs³

2009

View full text Add to dashboard Cite

Using soil gas chemistry to detect leakage from underground reservoirs (i.e. microseepage) requires that the natural range of soil gas flux and chemistry be fully characterized. To meet this need, soil gas flux (CO 2 , CH 4 ) and the bulk (CO 2 , CH 4 ) and isotopic chemistry (δ 13 C-CO 2 ) of shallow soil gases (<1 m, 3.3 ft) were measured at 25 locations distributed among two active oil and gas fields, an active strip mine, and a relatively undisturbed research forest in eastern Kentucky. The measurements apportion the biologic, atmospheric, and geologic influences on soil gas composition under varying degrees of human surface disturbance.The measurements also highlight potential challenges in using soil gas chemistry as a monitoring tool where the surface cover consists of reclaimed mine land or is underlain by shallow coals. For example, enrichment of δ 13 C-CO 2 and high CH 4 concentrations in soils have been historically used as indicators of microseepage, but in the reclaimed mine lands similar soil chemistry characteristics likely result from dissolution of carbonate cement in siliciclastic clasts having δ 13 C values close to 0‰and degassing of coal fragments. The gases accumulate in the reclaimed mine land soils because intense compaction reduces soil permeability, thereby impeding equilibration with the atmosphere. Consequently, the reclaimed mine lands provide a false microseepage anomaly.Further potential challenges arise from low permeability zones associated with compacted soils in reclaimed mine lands and shallow coals in undisturbed areas that might impede upward gas migration. To investigate the effect of these materials on gas migration and composition, four 10 m (33 ft) deep monitoring wells were drilled in reclaimed mine material and in undisturbed soils with and without coals. The wells, configured with sampling zones at discrete intervals, show the persistence of some of the aforementioned anomalies at depth. Moreover, high CO 2 concentrations associated with coals in the vadose zone suggest a strong affinity for adsorbing CO 2 . Overall, the low permeability of reclaimed mine lands and coals and CO 2 adsorption by the latter is likely to reduce the ability of surface geochemistry tools to detect a microseepage signal.iii EXECUTIVE SUMMARYUsing soil gas chemistry to detect leakage from underground reservoirs (i.e. microseepage) requires that the natural range of soil gas flux and chemistry be fully characterized. To meet this need soil gas flux (CO 2 , CH 4 ), and the bulk (CO 2 , CH 4 ) and isotopic chemistry (δ 13 C-CO 2 ) of shallow soil gases down to 1 m (3.3. ft) were measured under summer and winter conditions at 25 locations in eastern Kentucky. The locations are distributed among a research forest in which the surface and soils are relatively undisturbed by human activity, two active oil and gas fields having moderate levels of human disturbance, and active and historic strip mine areas having significant levels of human disturbance. The shallow measurements were followed ...

show abstract

Section: Shallow Soil Gas Measurementscontrasting

confidence: 44%

Geochemical Analyses of Surface and Shallow Gas Flux and Composition Over a Proposed Carbon Sequestration Site in Eastern Kentucky

Parris¹,

Solis²,

Takacs³

2009

View full text Add to dashboard Cite

show abstract

“…The transformation of native aquifer gases in the subsurface could also be crucial to assessing their overall influence on the environment. Klusman (2003Klusman ( , 2006 found that most of the CO 2 in oxic soils above exploited oil fields was attributable to the methanotrophic oxidation of methane and other hydrocarbons that migrated upwards from the reservoir. The formation of CH 4 from H 2 and CO 2 via methanogenesis under anaerobic conditions and in the presence of methanogens is also possible (Stevens and McKinley 1995).…”

Section: Importance Of Native Aquifer Gasesmentioning

confidence: 99%

Geochemical Implications of CO2 Leakage Associated with Geologic Storage: A Review

Harvey¹,

Qafoku²,

Cantrell³

et al. 2012

View full text Add to dashboard Cite

Leakage from deep storage reservoirs is a major risk factor associated with geologic sequestration of carbon dioxide (CO 2 ). Different scientific theories exist concerning the potential implications of such leakage for near-surface environments. The authors of this report reviewed the current literature on how CO 2 leakage (from storage reservoirs) would likely impact the geochemistry of near surface environments such as potable water aquifers and the vadose zone.Experimental and modeling studies highlighted the potential for both beneficial (e.g., CO 2 re-sequestration or contaminant immobilization) and deleterious (e.g., contaminant mobilization) consequences of CO 2 intrusion in these systems. Current knowledge gaps, including the role of CO 2 -induced changes in redox conditions, the influence of CO 2 influx rate, gas composition, organic matter content and microorganisms are discussed in terms of their potential influence on pertinent geochemical processes and the potential for beneficial or deleterious outcomes.Geochemical modeling was used to systematically highlight why closing these knowledge gaps are pivotal. A framework for studying and assessing consequences associated with each factor is also presented in Section 5.6. v

show abstract

“…This allows sampling at depths that are below the highest levels of environmental noise. A schematic of a 10-m hole construction is not shown, but the details of construction are shown [10,[19][20][21]. A design to bring the nested tubing up to a more optimum working level for sampling or field measurements in a long-term monitoring program was constructed, but never implemented [22].…”

Section: Methodsmentioning

confidence: 99%

Faults as Windows to Monitor Gas Seepage: Application to CO2 Sequestration and CO2-EOR

Klusman

2018

Geosciences

View full text Add to dashboard Cite

Monitoring of potential gas seepage for CO 2 sequestration and CO 2 -EOR (Enhanced Oil Recovery) in geologic storage will involve geophysical and geochemical measurements of parameters at depth and at, or near the surface. The appropriate methods for MVA (Monitoring, Verification, Accounting) are needed for both cost and technical effectiveness. This work provides an overview of some of the geochemical methods that have been demonstrated to be effective for an existing CO 2 -EOR (Rangely, CA, USA) and a proposed project at Teapot Dome, WY, USA. Carbon dioxide and CH 4 fluxes and shallow soil gas concentrations were measured, followed by nested completions of 10-m deep holes to obtain concentration gradients. The focus at Teapot Dome was the evaluation of faults as pathways for gas seepage in an under-pressured reservoir system. The measurements were supplemented by stable carbon and oxygen isotopic measurements, carbon-14, and limited use of inert gases. The work clearly demonstrates the superiority of CH 4 over measurements of CO 2 in early detection and quantification of gas seepage. Stable carbon isotopes, carbon-14, and inert gas measurements add to the verification of the deep source. A preliminary accounting at Rangely confirms the importance of CH 4 measurements in the MVA application.

show abstract

Detailed compositional analysis of gas seepage at the National Carbon Storage Test Site, Teapot Dome, Wyoming, USA

Cited by 39 publications

References 13 publications

Geochemical Analyses of Surface and Shallow Gas Flux and Composition Over a Proposed Carbon Sequestration Site in Eastern Kentucky

Geochemical Analyses of Surface and Shallow Gas Flux and Composition Over a Proposed Carbon Sequestration Site in Eastern Kentucky

Geochemical Implications of CO2 Leakage Associated with Geologic Storage: A Review

Faults as Windows to Monitor Gas Seepage: Application to CO2 Sequestration and CO2-EOR

Contact Info

Product

Resources

About