Subsurface geochemical fate and effects of impurities contained in a CO2 stream injected into a deep saline aquifer: What is known

Talman, Stephen

doi:10.1016/j.ijggc.2015.04.019

Cited by 64 publications

(34 citation statements)

References 105 publications

(210 reference statements)

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“…Focusing on chemical trapping, a distinction between aqueous phase trapping (solubility and ionic trapping) and mineral trapping can be done (Talman, 2015). Considering the duration of the test, it is clear that the second case is not the scope ofthis work so only the expected reaction with the aqueous phase should be taken into account, i.e.…”

Section: Discussionmentioning

confidence: 99%

“…Considering the duration of the test, it is clear that the second case is not the scope ofthis work so only the expected reaction with the aqueous phase should be taken into account, i.e. solubility ofwater in the injected high-density C02 -stream and hydrolysis reactions or ionization of water (Talman, 2015): C0 2 (aq) + H 2 0_W + HCO:¡ Fig. 16.…”

Section: Discussionmentioning

confidence: 99%

“…This may be due to ion migration effects in the rack according to test duration and the nature ofthe impurities (02 and N2l. no were detected (Talman, 2015). Finally and continuing with the liquid phase analysis, worth mentioning is the fact that the dissolved C02 trend is positive although the test durations were not enough (there is more C02 dissolved conform over time) whereas the pH behaviour is the contrary (negative trend).…”

Section: Acknowledgmentsmentioning

confidence: 90%

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Short-term effects of impurities in the CO 2 stream injected into fractured carbonates

Dios

Delgado

Marín

et al. 2016

International Journal of Greenhouse Gas Control

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After the Paris Agreement in which 195 countries are involved, the Carbon Capture and Storage (CCS) is now an accepted technology in the United Nations Framework Convention on Climate Change (UNFCCC). In Spain, Fundación Ciudad de la Energía (ClUDEN) has successfully completed the full CCS chain, being C02 captured in the Technology Development Centre in Cubillos del Sil (León, Spain) whereas that it is geologically stored in a deep saline aquifer, formed by fractured carbonates with poor matrix porasity, located in the Technology Development Plant (TDP) at Hontomín (Burgos, Spain).The results of the field tests, in which up to 150t of CO 2 and synthetic air (5%v of N 2 and O 2 ) were co-injected on site, are analyzed in this paper comparing the operational parameters gained during the injection of impure CO 2 (pressures, temperatures and flow ranges) with its corresponding baseline previously determined (Le. 1500tons of pure C02 were injected during the reservoir hydraulic characterization). Besides that, the geochemical reactivity analysis of impure C02 injected in this saline aquifer and its correlation with the results fram laboratory tests were assessed.As main conclusions fram laboratory scale results, a porasity diminution was measured after the injection of CO 2 with 5%v of S02; apart fram that, without S02, the effluent pH was in the range of 7-8 whereas in case of CO 2 and S02, a pH of 1-2 was obtained. Otherwise and focused on field scale tests, a density decrease was detected comparing the base case (pure CO 2 ) with the CO 2 injection containing 5.1%v of synthetic air. On the other hand, Ca 2 +, S04 2 -, Mg2+ and K+ migration effects in the rack were also detected and analyzed. ObjectiveThe main objective was to carry out field scale injection tests of C02 and synthetic air (i.e. 02 and N2) into fractured carbonates with poor primary porosity and transmissivity through the fracture network, to identify and assess the impacts ofthese impurities Abbreviations: BHP, bottom-hole pressure; BOP, balance of plant; CCS, carbon capture and storage; ClUDEN, Fundation Ciudad de la Energía; DOT, pressure vessel used to store fluids at aboye atmospheric pressure, the acronym is department oftransport; DTS, distributed temperature sensing; ERT, electrical tomography system; Fm, formation; FIlR, Fourier Transform lnfrared (analyzer); HA well, Hontomín observation (or auscultation) well; Hl well, Hontomín injection well; lEA, lnternational Energy Agency; I&C, instrumentation and control; LoT, leak-off-test (pressure); PFD, process flow diagram; TDP, Technology Development Plant; WHP, well-head pressure. * Corresponding author.E-mail addresses:jc.dedios@ciuden.es.jcdediosgonzalez@gmail.com U.e. de Dios).in the short-term stability of C02 storage and their inf!uences on site operation. Laboratory scale test campaign was previously conducted in order to study the chemical interactions between impure C02/brine and carbonates reservoir.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Acknowledgmentsmentioning

confidence: 90%

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Short-term effects of impurities in the CO 2 stream injected into fractured carbonates

Dios

Delgado

Marín

et al. 2016

International Journal of Greenhouse Gas Control

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“…[16][17]. However, it has been suggested that except for the cases of SO x and NO x , the chemical effects of co-injected impurities would be minor [18]. Even for the strong reactive SO 2 impurity, it was suggested that the lower pH caused by SO 2 would be buffered by mineral dissolution during the timescale of acidification [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

“…Apart from the possible geochemical effects of certain reactive impurities, the physical properties of impurities could significantly affect the permanence and security of the subsurface sequestration of the impure CO 2 streams, especially in the short to medium term. The impurities would lead to changes in physical properties of the CO 2 streams, such as density and viscosity, thereby changing buoyancy, interfacial tension as well as other properties, which would affect the migration and dissolution of the CO 2 plume [18,[22][23][24]. It should also be noted that most existing studies give priority to the investigations of the impact of one specific co-injected impurity, such as SO 2 , H 2 S, N 2 , O 2 or CH 4 , etc., while only a few experimental and numerical investigations have examined the effects of impurities in ternary mixtures, e.g.…”

Section: Introductionmentioning

confidence: 99%

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

Jiang

2017

Applied Energy

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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.

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Gas‐Water‐Mineral Reactivity in Caprocks

Pearce

Dawson

2018

Geological Carbon Storage

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Subsurface geochemical fate and effects of impurities contained in a CO2 stream injected into a deep saline aquifer: What is known

Cited by 64 publications

References 105 publications

Short-term effects of impurities in the CO 2 stream injected into fractured carbonates

Short-term effects of impurities in the CO 2 stream injected into fractured carbonates

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

Gas‐Water‐Mineral Reactivity in Caprocks

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