Geophysical investigations in the Gañuelas-Mazarrón Tertiary basin (SE Spain): A natural analogue of a geological CO 2 storage affected by anthropogenic leakages

Rodrigo-Naharro, Julio; Aracil, E.; Villar, Luis

doi:10.1016/j.jappgeo.2018.06.006

Cited by 4 publications

(6 citation statements)

References 24 publications

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“…The geophysical studies performed within this basin by Rodrigo-Naharro et al (2018) confirm the existence at depth of the abovementioned three primary groups of geological materials. Evidence of these has been supported through differences in resistivity logs: the Nevado-Filábride Complex, the Tertiary sedimentary succession and the more or less altered Neogene volcanic rocks that normally intrude into the sedimentary materials.…”

Section: Geological Backgroundsupporting

confidence: 60%

“…The modelled cross section A-A' (see Figs. 1 and 2a) obtained from a gravimetric research study shows a geological model of the GMTB with its vertical boundaries and a deeply sunken central zone (~9 km wide) divided into two sectors, reaching a depth of about 900 m in the SW sector (Rodrigo-Naharro et al, 2018). This geological model (see Fig.…”

Section: Geological Backgroundmentioning

confidence: 97%

“…In the framework of a large project on Carbon Capture and Storage (CCS) technologies, the Gañuelas-Mazarrón Tertiary Basin (GMTB), SE Spain, was studied as an analogue of a natural CO 2 reservoir affected by leakages (Pérez del Villar et al, 2008;Nisi et al, 2010a,b;Rodrigo-Naharro et al, 2011, Rodrigo-Naharro et al, 2013aRodrigo-Naharro, 2014;Rodrigo-Naharro et al, 2017, 2018. CO 2 -rich saline groundwater from deep and thermal aquifers are currently upwelling through geothermal wells, precipitating travertines at the water discharge points.…”

Section: Introductionmentioning

confidence: 99%

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Current travertines precipitation related to artificial CO2 leakages from a natural reservoir (Gañuelas-Mazarrón Tertiary Basin, SE Spain)

Rodrigo-Naharro

Herrero

Huertas

et al. 2019

Journal of Hydrology

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In the framework of a natural CO 2 reservoir with CO 2 leakages as an analogue of a failed CO 2 deep geological storage, the current precipitation of travertines and the associated upwelling of CO 2-rich saline groundwater were analysed. This natural analogue is located in the Gañuelas-Mazarrón Tertiary Basin (SE Spain). The study comprises of the chemistry of both groundwater and travertines, including stable isotopes, mineralogy and petrography of the travertines, all this performed after a review of the geology of the basin. In this sense, the basin gathers the main features of a safe natural CO 2 reservoir in a deep saline aquifer sealed by a thick marl formation. The aquifer was artificially perturbed by the drilling of wells, inducing the travertines precipitation at these water discharge points. Groundwater is saline, slightly acid, oversaturated in aragonite and calcite and with significant concentrations of heavy elements, some of them toxic. From an isotopic viewpoint, the relative constant δ 13 C-DIC values suggest that carbon is mainly inorganic in origin with minor organic and mantle contributions. Travertines are basically composed of aragonite or calcite, their precipitation being controlled by a sudden CO 2 degassing and minor biological activity. Their δ 13 C signatures indicate that carbon mainly has an inorganic origin, although some contribution of organic carbon must be considered as well. Furthermore, these carbonate deposits did not precipitate in isotopic equilibrium, as determined by δ 18 O values. Finally, it is suggested that the appearance of travertines along with their carbon isotopic signatures represent efficient tools for detecting CO 2 leakages from any CO 2 storage site.

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Section: Geological Backgroundsupporting

confidence: 60%

Section: Geological Backgroundmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

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Current travertines precipitation related to artificial CO2 leakages from a natural reservoir (Gañuelas-Mazarrón Tertiary Basin, SE Spain)

Rodrigo-Naharro

Herrero

Huertas

et al. 2019

Journal of Hydrology

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“…Recently, electrical resistivity tomography (ERT) has been combined with the hydrochemical and environmental isotopic study to provide an image of near-surface structures and to assess the migration pathway of CO 2 -rich fluids in the sites of both natural emission and artificial injection tests [16,22,32,33]. ERT is a noninvasive technique to image the electrical resistivity pattern of the subsurface [34].…”

Section: Introductionmentioning

confidence: 99%

“…ERT is a noninvasive technique to image the electrical resistivity pattern of the subsurface [34]. The distribution of the resistivity is related to the geologic, hydrogeologic, and hydrochemical properties, and thus useful to estimate the pathways of fluids with contrast resistivity, including CO 2 -rich water that has relatively low pH and high electrical conductivity (EC) [16,32].…”

Section: Introductionmentioning

confidence: 99%

Hydrochemical Parameters to Assess the Evolutionary Process of CO2-Rich Spring Water: A Suggestion for Evaluating CO2 Leakage Stages in Silicate Rocks

Kwon

Yun

2020

Water

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Eighteen water samples collected from eight CO2-rich springs in the northern part of the Gyeongsang sedimentary basin (GSB), South Korea showed distinct hydrochemistry, in particular, pH, total dissolved solids (TDS), and Na contents, and they were classified into four groups: (1) Group I with low pH (average of 5.14) and TDS (269.8 mg/L), (2) Group II with high TDS (2681.0 mg/L) and Na-enriched (202.9 mg/L), (3) Group III with intermediate Na content (97.5 mg/L), and (4) Group IV with Na-depleted (42.3 mg/L). However, they showed the similar partial pressure of CO2 (0.47 to 2.19 atm) and stable carbon isotope ratios of dissolved inorganic carbon (−6.3 to −0.6‰), indicating the inflow of deep-seated CO2 into aquifers along faults. In order to elucidate the evolutionary process for each group of CO2-rich springs, a multidisciplinary approach was used combining stable hydrogen (δD), oxygen (δ18O) and carbon (δ13C), and radioactive carbon (14C) isotopic, geophysical, and hydrochemical data. The highest δD and δ18O ratios of water and the relatively young 14C ages in Group I and the lowest δD and δ18O in Group II indicated the short and long residence time in Group I and II, respectively. The electrical resistivity tomography (ERT) survey results also supported the fast rising through open fractures in Group I, while a relatively deep CO2-rich aquifer for Group III. Group II had high contents of Mg, K, F, Cl, SO4, HCO3, Li, and As, while Group I showed low contents for all elements analyzed in this study except for Al, which exceeded the World Health Organization (WHO) guideline for drinking-water quality probably due to the low pH. Meanwhile Group IV showed the highest Ca/Na as well as Ca, Fe, Mn, Sr, Zn, U, and Ba, probably due to the low-temperature dissolution of plagioclase based on the geology and the ERT result. The levels of Fe, Mn, and U exceeded the WHO guidelines in Group IV, while As in Group II. The different hydrochemistry suggests a distinct evolutionary process for each group. Group I seems to represent a fast discharge from the CO2-rich aquifer to a discharge point, experiencing a low degree of water-rock interaction, while Group II seems to represent a slow discharge with a high degree of water-rock interaction. GSB is a potential site for geological carbon storage (GCS), and injected CO2 may leak through various evolutionary processes given heterogenous geology as CO2-rich springs. The study result suggests that the combined use of pH, Na, K, Li, and Ca/Na are effective hydrochemical monitoring parameters to assess the leakage stage in silicate rocks in GCS projects. Besides, aluminum (Al) can be risky at the early stage of CO2 leakage, while Fe, Mn, U, and As at the later stage of CO2 leakage.

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A study of natural analogues for predicting the performance of a CO2 geological storage: the experience from a natural CO2 reservoir (Gañuelas-Mazarrón Tertiary Basin, SE Spain)

Rodrigo-Naharro

Villar

2020

Environ Earth Sci

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Geophysical investigations in the Gañuelas-Mazarrón Tertiary basin (SE Spain): A natural analogue of a geological CO 2 storage affected by anthropogenic leakages

Cited by 4 publications

References 24 publications

Current travertines precipitation related to artificial CO2 leakages from a natural reservoir (Gañuelas-Mazarrón Tertiary Basin, SE Spain)

Current travertines precipitation related to artificial CO2 leakages from a natural reservoir (Gañuelas-Mazarrón Tertiary Basin, SE Spain)

Hydrochemical Parameters to Assess the Evolutionary Process of CO2-Rich Spring Water: A Suggestion for Evaluating CO2 Leakage Stages in Silicate Rocks

A study of natural analogues for predicting the performance of a CO2 geological storage: the experience from a natural CO2 reservoir (Gañuelas-Mazarrón Tertiary Basin, SE Spain)

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