Using the Kerr investigations at Weyburn to screen geochemical tracers for near-surface detection and attribution of leakage at CCS/EOR sites

Risk, David; Lavoie, Martin; Nickerson, Nick

doi:10.1016/j.ijggc.2015.01.019

Cited by 14 publications

(8 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In terms of leakage monitoring, the natural variation of monitoring parameters can dilute the leakage signal and deteriorate the monitoring efficiency. For this complicated issue, Risk et al (2015) defined a minimum threshold value for each monitoring parameter to confirm CO 2 leakage safely. According to previous research, a "leakage" could be detected safely when signals of a monitoring parameter increase over the three sigma value of the natural variation of the parameter.…”

Section: Monitoring Efficiency Of Noble Gas Tracersmentioning

confidence: 99%

“…The monitoring of leaked CO 2 is often complicated by naturally occurring CO 2 in the subsurface system. The distribution of CO 2 is very heterogeneous in a natural groundwater system as a result of chemical, biological, and physical interactions (Risk et al, 2015). The use of stable C isotopes for leakage monitoring can also be challenging because their signals in leaked fluids can overlap with those of common surface sources (e.g., landfills) (Györe et al, 2017), following bacterial activity that enriches the 13 C by an oxidation process (Whiticar et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Noble gas as a proxy to understand the evolutionary path of migrated CO2 in a shallow aquifer system

Lee

Kaown

et al. 2020

Applied Geochemistry

View full text Add to dashboard Cite

show abstract

Section: Monitoring Efficiency Of Noble Gas Tracersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Noble gas as a proxy to understand the evolutionary path of migrated CO2 in a shallow aquifer system

Lee

Kaown

et al. 2020

Applied Geochemistry

View full text Add to dashboard Cite

show abstract

“…This was the case at the CCS site of Weyburn in 2011 [57,58]. Several studies have demonstrated the natural origin of the discovered CO 2 emission, related to specific processes in the soil formations close to the surface [59][60][61]. Nevertheless, eight years after the allegation has been raised, research is still ongoing aiming to discard or confirm CCS-induced leakage [62,63].…”

Section: Discussionmentioning

confidence: 99%

Towards a Better Knowledge of Natural Methane Releases in the French Alps: A Field Approach

2019

View full text Add to dashboard Cite

We report investigations performed at some hydrocarbon gas seeps located in the French Subalpine Chains in zones of outcropping Jurassic black shales, increasing the reported number of such occurrences in this part of the Alps. We present the characteristics of each of the seeps, based on soil flux measurements and soil gas measurements. Gases emitted are CH4-rich (87–94%) with the exception of one site (78.5% CH4 + 8.2% CO2) where an active landslide may induce dilution by atmospheric air. CO2 is generally measured at low levels (<1.6%). Concentrations in C2H6 are more variable, from less than 1% to more than 2.3%. Gas is emitted over areas of various sizes. The smallest gas emission area measures only 60×20 cm, characterized by a strong hydrocarbon flux (release of about 100 kg of CH4 per year). At a second site, hydrocarbon emissions are measured over a surface of 12 m2. For this site, methane emission is evaluated at 235 kg per year and CO2 emission is 600 kg per year, 210 kg being related to gas seepage. At the third site, hydrocarbons are released over a 60 m2 area but strong gas venting is restricted to localized seeps. Methane emission is evaluated at 5.1 tons per year and CO2 emission at 1.58 tons per year, out of which 0.53 tons are attributed to gas seepage. Several historical locations remain uninvestigated at present, and numerous others may still be unknown. We outline strategies to search for such unrecorded sites. Considering the topography of the potential alpine and perialpine emission areas, the possibilities to detect gas emissions appear of the size recorded so far seem to be restricted to ground-based methods or to methods offering the possibility to point orthogonally to the soil towards the seep maximum. If such sites are to be investigated in the future in the frame of Environmental Baseline Assessment (EBA), even establishing appropriate monitoring protocols will be challenging.

show abstract

“…For example, noble gases such as He, Ne and Ar, e.g. [49][50][51] and perfluorocarbon tracers [52][53][54] have been used as to identify CO 2 migration or to monitor leakage. The tracers were normally in very small amounts and were injected or added intentionally for short-periods monitoring while sufficient amount of these artificial tracers for large-scale projects might be cost-prohibitive [54].…”

Section: Discussionmentioning

confidence: 99%

Numerical investigation of the partitioning phenomenon of carbon dioxide and multiple impurities in deep saline aquifers

Jiang

2017

Applied Energy

View full text Add to dashboard Cite

Highlights• The partitioning behaviours of impure CO 2 in geological formations are investigated.• The effects of N 2 , CH 4 or the mixture of N 2 and CH 4 are generally similar.• Less soluble N 2 and CH 4 enhance gas breakthroughs and the partitioning.• More soluble species such as H 2 S dissolves preferentially in the formation brine. AbstractThe partitioning behaviours of CO 2 with three kinds of common impurities, i.e., N 2 , CH 4 and H 2 S, in the formation brine are investigated by numerical simulations. The results indicate that the effects of N 2 , CH 4 or the mixture of N 2 and CH 4 at the same concentrations are generally similar. The leading gas front is usually made up of less soluble impurities, such as N 2 , CH 4 or the mixture of N 2 and CH 4 , while more soluble species such as H 2 S has dissolved preferentially in the formation brine. The separations between different gas species increase as the gas displacement front migrates forwards and contacts more of the aqueous phase. Compared with the partitioning results of the 98% CO 2 and 2% H 2 S mixture, the results indicate that the inclusion of less soluble N 2 and/or CH 4 results in an earlier gas breakthrough and a longer delay between the breakthrough times of CO 2 and H 2 S. The early breakthrough of the gas phase is mainly because that the addition of N 2 and/or CH 4 lowers the viscosity of the gas phase, resulting in a higher gas velocity than that of the CO 2 -H 2 S mixture. Meanwhile, the mobility ratio is higher and the gas mixture contacts the formation brine over a larger area, giving rise to more efficient stripping of the more soluble gas species like H 2 S and thus larger separations. In the meantime, with the same total concentrations of impurities (12%), when 2% H 2 S is contained in the CO 2 streams, gas phase flows slower and thus the breakthrough time is later. Furthermore, the effects on the partitioning phenomenon are weaker with decreasing concentrations of N 2 and/or CH 4 (from 10% to 2%) with fixed concentrations of other impurity like H 2 S (2%). The migration distances and the separations between different gas species change linearly with time on the whole, as confirmed by a simulation in a longer model.

show abstract

Using the Kerr investigations at Weyburn to screen geochemical tracers for near-surface detection and attribution of leakage at CCS/EOR sites

Cited by 14 publications

References 20 publications

Noble gas as a proxy to understand the evolutionary path of migrated CO2 in a shallow aquifer system

Noble gas as a proxy to understand the evolutionary path of migrated CO2 in a shallow aquifer system

Towards a Better Knowledge of Natural Methane Releases in the French Alps: A Field Approach

Numerical investigation of the partitioning phenomenon of carbon dioxide and multiple impurities in deep saline aquifers

Contact Info

Product

Resources

About