CO2 geological storage capacity analysis in Estonia and neighbouring regions

Shogenova, Alla; Shogenov, Kazbulat; Vaher, R.; Ivask, Jüri; Šliaupa, Saulius; Vangkilde-Pedersen, Thomas; Uibu, Mai; Kuusik, Rein

doi:10.1016/j.egypro.2011.02.182

Cited by 16 publications

(8 citation statements)

References 13 publications

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“…Vaikmäe et al, 2001;Raidla et al, 2009) and glacial flushing was studied by Zuzevicius et al (2010) and Saks et al (2012). Knowing how the Pleistocene glaciations influenced the flow dynamics in the BAB has important implications for sustainable management of the groundwater as a source of drinking water (Vaikmäe et al, 2001) and for potential long-term storage of radioactive waste or CO 2 (Shogenova et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Using 81Kr and noble gases to characterize and date groundwater and brines in the Baltic Artesian Basin on the one-million-year timescale

Gerber

Vaikmäe

Aeschbach–Hertig

et al. 2017

Geochimica et Cosmochimica Acta

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Analyses for 81 Kr and noble gases on groundwater from the deepest aquifer system of the Baltic Artesian Basin (BAB) were performed to determine groundwater ages and uncover the flow dynamics of the system on a timescale of several hundred thousand years. We find that the system is controlled by mixing of three distinct water masses: Interglacial or recent meteoric water (δ 18 O ≈ −10.4‰) with a poorly evolved chemical and noble gas signature, glacial meltwater (δ 18 O ≤ −18 ‰) with elevated noble gas concentrations, and an old, high-salinity brine component (δ 18 O ≥ −4.5‰, ≥ 90 g Cl − /L) with strongly depleted atmospheric noble gas concentrations. The 81 Kr measurements are interpreted within this mixing framework to estimate the age of the endmembers. Deconvoluted 81 Kr ages range from 300 ka to 1.3 Ma for interglacial or recent meteoric water and glacial meltwater. For the brine component, ages exceed the dating range of the ATTA-3 instrument of 1.3 Ma. The radiogenic noble gas components 4 He* and 40 Ar* are less conclusive butalso support an age of > 1 Ma for the brine. Based on the chemical and noble gas concentrations and the dating results, we conclude that the brine originates from evaporated seawater that has been modified by later water-rock interaction. As the obtained tracer ages cover several glacial cycles, we discuss the impact of the glacial cycles on flow patterns in the studied aquifer system. Virbulis et al., 2013), the latter of which estimated the hydraulic age of groundwater in the CAS to be on the order of several hundreds of ka to 1 Ma. In the light of such long residence times, it is crucial to consider the effect of repeated glacial cycles on the long-term evolution of groundwater composition and flow. Sampling the deeper parts of the CAS on a regional scale for chemistry, noble gases, and multiple dating tracers ( 81 Kr, 85 Kr, 39 Ar, 14 C, 4 He, 40 Ar) allows us to elucidate the evolution of the brine, mixing proportions of the different groundwater components, and the flow dynamics over the last 1 Ma.

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Section: Introductionmentioning

confidence: 99%

Using 81Kr and noble gases to characterize and date groundwater and brines in the Baltic Artesian Basin on the one-million-year timescale

Gerber

Vaikmäe

Aeschbach–Hertig

et al. 2017

Geochimica et Cosmochimica Acta

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“…However, based on the data, most of the fossil CO 2 emissions in the Baltic States (in total) are produced by fuel combustion in electricity and thermal energy generation in Estonia [58]. Estonia (Eesti Energia) up to now has been producing the largest CO 2 emissions in the Baltic States due to the combustion of oil shale for energy generation [60]. The Eesti Power Plant, which is run by Eesti Energia, is the largest energy enterprise in the Baltic region [60].…”

Section: Fossil Co 2 Emission Sources In the Baltic Statesmentioning

confidence: 99%

Potential of the Middle Cambrian Aquifer for Carbon Dioxide Storage in the Baltic States

et al. 2021

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The importance of CO2 removal from the atmosphere has long been an essential topic due to climate change. In this paper, the authors aim to demonstrate the suitability of the underground reservoirs for CO2 storage based on their geological characteristics. The research addressed the potential of geological formations for fossil CO2 storage in the Baltic States to support the goal of achieving carbon neutrality in the region. The geological, technical, and economic feasibility for CO2 storage has been assessed in terms of carbon sequestration in geological structures and the legal framework for safe geological storage of fossil CO2. Results indicate that prospective structural traps in the Baltic States, with reasonable capacity for CO2 storage, occur only in Southwestern Latvia (onshore) and in the Baltic Sea (offshore), whilst other regions in the Baltics either do not meet basic geological requirements, or have no economically feasible capacity for CO2 storage. Based on the examination of geological characteristics, the most fitting is the middle Cambrian reservoir in the Baltic sedimentary basin, and one of the most prospective structural traps is the geological structure of Dobele, with an estimated storage capacity of 150 Mt CO2. This study revealed that the storage capacity of the middle Cambrian reservoir (up to 1000 Mt CO2) within the borders of Southwestern Latvia is sufficient for carbon capture and safe storage for the whole Baltic region, and that geological structures in Latvia have the capacity to store all fossil CO2 emissions produced by stationary sources in the Baltic States for several decades.

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“…The Utsira sandstone formation at the first in the world Sleipner storage site in the North Sea has a storage capacity of approximately 15 Gt [Halland et al, 2011]. More than 30 anticlinal deep geological structures onshore and offshore Latvia and Lithuania, with different sizes and a storage capacity exceeding 2 Mt of CO 2 , have been estimated as prospective for CGS [Sliaupa et al, 2008a;Shogenova et al, 2009aShogenova et al, , 2009bShogenova et al, , 2011aShogenova et al, , 2011bŠliaupa et al, 2013;Shogenov et al, 2013aShogenov et al, , 2013b. Four geological structures, located onshore (South Kandava and Dobele) and offshore Latvia (E6) and Lithuania (E7) and serving as prospective CGS sites in the Baltic Region (Figure 1), were previously described in detail by Shogenov et al [2013aShogenov et al [ , 2013b.…”

Section: Motivation Of the Studymentioning

confidence: 99%

“…Due to the use of local oil shale for energy production, Estonian CO 2 emissions per capita are among the highest in Europe and in the world [e.g., Shogenova et al ., , , , ]. The main target for the CGS study in the Baltic Region (Estonia, Latvia, and Lithuania) is the Baltic sedimentary basin or Baltic Syneclise, a 700 km × 500 km synclinal structure located in the western part of the East European Craton.…”

Section: Introductionmentioning

confidence: 99%

Experimental modeling of CO₂‐fluid‐rock interaction: The evolution of the composition and properties of host rocks in the Baltic Region

Shogenov

Shogenova

Vizika-Kavvadias

et al. 2015

Earth and Space Science

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The objective of this study was to determine the influence of the possible CO 2 geological storage in the Baltic Region on the composition and properties of host rocks to support more reliable petrophysical and geophysical models of CO 2 plume. The geochemical, mineralogical, and petrophysical evolution of reservoir sandstones of Cambrian Series 3 Deimena Formation and transitional clayey carbonate caprocks of Lower Ordovician Zebre Formation from two offshore structures in Latvia and Lithuania and two onshore structures in Latvia, induced by laboratory-simulated CO 2 geological storage, was studied for the first time in the Baltic Region. The geochemical, mineralogical, and petrophysical parameters were measured in 15 rock samples, before and after the alteration experiment. The diagenetic alterations of reservoir rocks were represented by carbonate cementation in the top of the onshore South Kandava structure, and quartz cementation and compaction, reducing the reservoir quality, in the deepest offshore E7 structure in Lithuania. The shallowest E6 structure offshore Latvia was least affected by diagenetic processes and had the best reservoir quality that was mainly preserved during the experiment. Carbonate cement was represented by calcite and ankerite in the transitional reservoir sandstones of very low initial permeability in the upper part of the South Kandava structure. Its dissolution caused a significant increase in the effective porosity and permeability of sandstones, a decrease in the weight of samples, bulk and matrix density, and P and S wave velocities, demonstrating short-term dissolution processes. Only slight geochemical changes occurred during the experiment in offshore reservoir sandstones. Minor dissolution of carbonate and clay cements, feldspar and some accessory minerals, and possible minor precipitation of pore-filling secondary minerals associated with slight variations in rock properties, demonstrating both short-term and long-term processes, were suggested. As a novelty, this research shows the relationship between diagenetic alterations of the Cambrian Series 3 Deimena Formation reservoir sandstones and their changes caused by the CO 2 injection-like experiment.

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CO2 geological storage capacity analysis in Estonia and neighbouring regions

Cited by 16 publications

References 13 publications

Using 81Kr and noble gases to characterize and date groundwater and brines in the Baltic Artesian Basin on the one-million-year timescale

Using 81Kr and noble gases to characterize and date groundwater and brines in the Baltic Artesian Basin on the one-million-year timescale

Potential of the Middle Cambrian Aquifer for Carbon Dioxide Storage in the Baltic States

Experimental modeling of CO₂‐fluid‐rock interaction: The evolution of the composition and properties of host rocks in the Baltic Region

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CO2 geological storage capacity analysis in Estonia and neighbouring regions

Cited by 16 publications

References 13 publications

Using 81Kr and noble gases to characterize and date groundwater and brines in the Baltic Artesian Basin on the one-million-year timescale

Using 81Kr and noble gases to characterize and date groundwater and brines in the Baltic Artesian Basin on the one-million-year timescale

Potential of the Middle Cambrian Aquifer for Carbon Dioxide Storage in the Baltic States

Experimental modeling of CO2‐fluid‐rock interaction: The evolution of the composition and properties of host rocks in the Baltic Region

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Product

Resources

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Experimental modeling of CO₂‐fluid‐rock interaction: The evolution of the composition and properties of host rocks in the Baltic Region