The geology and hydrology of the CarbFix2 site, SW-Iceland

Snæbjörnsdóttir, Sandra Ó.; Tómasdóttir, Sigrún; Sigfússon, Bergur; Aradóttir, Edda Sif; Gunnarsson, Gunnar; Niemi, Auli; Basirat, Farzad; Dessirier, Benoît; Gíslason, Sigurður R.; Oelkers, Eric H.; Franzson, Hjalti

doi:10.1016/j.egypro.2018.07.019

Cited by 30 publications

(38 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The possible storage sites include depleted oil/gas fields, 2–4 deep saline aquifers, 5–7 unmineable coal seams, 8,9 and basaltic rocks 10–12 . One of the main concerns of CCS is the long‐term safety of CO 2 fixation which occurs via two mechanisms: physical and geochemical trapping 13 . The first one consists of static (structural and stratigraphic), hydrodynamic, and residual gas trapping.…”

Section: Introductionmentioning

confidence: 99%

“…Indonesia is currently the second largest geothermal energy producer in the world having a total installed capacity of 1925 MW with most of these fields located close to CO 2 sources in Java and Sumatra Islands 29 . The development of CCS in geothermal fields 12,13,15,16 consequently makes Indonesia a potential leader in testing and potentially demonstrating this technology. Further, the reservoir rock in most geothermal fields in Indonesia comprises volcanics with intermediate composition 30 consisting of active silicate minerals (source of Ca 2+ , Mg 2+ , and Fe 2+ ) required for carbonate formation 31 .…”

Section: Introductionmentioning

confidence: 99%

“…[10][11][12] One of the main concerns of CCS is the long-term safety of CO 2 fixation which occurs via two mechanisms: physical and geochemical trapping. 13 The first one consists of static (structural and stratigraphic), hydrodynamic, and residual gas trapping. The second, which is considered to be the safest means of fixation, is separated into solubility and mineral trapping 14 in which the injected CO 2 is converted into permanent aqueous and immobile carbonates, respectively.…”

mentioning

confidence: 99%

“…Further, the reservoir rock in most geothermal fields in Indonesia comprises volcanics with intermediate composition 30 consisting of active silicate minerals (source of Ca 2+ , Mg 2+ , and Fe 2+ ) required for carbonate formation. 31 Although successful CCS operations have only been conducted in geothermal fields with basaltic reservoirs, 13,15,16 experimental studies of CO 2 storage in intermediate and felsic reservoirs have also been attempted. [32][33][34] Due to their relatively short distance to CO 2 sources and theoretically compatible lithology for CO 2 storage, 32,33 Indonesian geothermal fields have a potential to become possible future CO 2 storage sites and thus a preliminary study to support such an idea is required.…”

mentioning

confidence: 99%

“…Considering the importance of solubility and mineral trapping for long-term safety of CO 2 storage, 13,14 assessment of both mechanisms through geochemical study is common prior to CCS operations. Such assessments can be achieved through monitoring, experimental laboratory studies, and geochemical modeling of CO 2 -brine rock interaction.…”

mentioning

confidence: 99%

See 4 more Smart Citations

Preliminary geochemical investigation of a possible CO₂ injection in the Ungaran geothermal field, Indonesia: equilibrium and kinetic modeling

Utomo

Güleç

2020

Greenhouse Gases

View full text Add to dashboard Cite

Carbon capture and storage (CCS) is considered to be an effective method to mitigate anthropogenic carbon emissions that have been the major cause of global warming. One of the possible sites to store CO 2 is in geothermal reservoirs. In this study, an attempt to simulate CO 2-brine reservoir rock interaction inside a geothermal reservoir is carried out using the PHREEQC program. The study utilizes published rock mineralogy of the assumed reservoir lithology and chemistry of the hot water in the Ungaran geothermal field, Java, Indonesia. The simulation is based on equilibrium and kinetic modeling and assumes a single stage CO 2 injection kept at a constant temperature and pressure. The amount of injected CO 2 is determined by solubility modeling of CO 2 in hot water under estimated reservoir conditions. The modeling predicted (i) the effect of solubility trapping at early stages of CO 2-brine rock interaction, (ii) dissolution of Ca-bearing silicates (plagioclases) coupled with calcite precipitation as a potential chemical processes relevant to a possible CO 2 mineralization, (iii) progressive transition from solubility to mineral trapping becoming significant after 30 days following injection, (iv) minor porosity increase (∼0.5%), and (v) achievement of equilibrium between CO 2-brine-rock in 10 years after injection. Sensitivity analysis associated with the uncertainties for altering mineral proportion and rock porosity reveal no significant change in the ability of the modeled reservoir to trap injected CO 2 into mineral phases. Concerning the CCS studies so far carried out in geothermal fields in volcanic reservoirs, this modeling comprises one of the first performed for fields with intermediate volcanics. The result from this study can be utilized as foreknowledge for possible future CCS operations in Indonesian geothermal fields.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

Preliminary geochemical investigation of a possible CO₂ injection in the Ungaran geothermal field, Indonesia: equilibrium and kinetic modeling

Utomo

Güleç

2020

Greenhouse Gases

View full text Add to dashboard Cite

show abstract

Carbon capture induced changes in Deccan basalt: a mass‐balance approach

Kumar

Shrivastava

2019

Greenhouse Gases

View full text Add to dashboard Cite

Previous studies on the Deccan basalt–water–CO2 interaction were focused on numerical simulations and experimental validation that revealed carbonate formation, but restricted to low temperatures and for a shorter period. However, during prolonged interactions, silicates restricted carbonates from forming, and thus necessitated for comparative mass‐balance calculations of parent basalt, neo‐formed mineral and dissolution products to understand apposite parameters that control the reaction extent and optimal geochemical conditions. To examine these interactions, mass‐balance calculations have been attempted. A gradual increase in HCO3− concentration and basalt dissolution is concomitant with the increase in experimental run time; thus, the pH of the solution is affected. X‐ray diffraction and scanning electron microscope–energy dispersive X‐ray spectrometer analyses revealed the presence of carbonates in the post‐experiment residue (run for a shorter period). Owing to gradual carbonate decrease in the residue, Ca2+, Fe2+ and Mg2+ released from basalt gradually increased in the leachate at 100°C. But with the progression of time at 200°C, more secondary silicates were formed and incorporated Mg2+ and Si4+, which led to a decrease in Mg2+ and Si4+ concentrations in the leachate. Mass‐balance calculations revealed that the maximum amount of CO2 is mineralized (22.88 mol%) from the ions derived from the parent basalt at 100°C under 5 bar CO2 and 70 h of experiment running time. But, for longer periods of experiments, the rate of ionic interactions as well as CO2 mineralization is almost ceased. Thus, the rate of dissolution is affected by temperature, but the amount of CO2 mineralization is directly a function of the basalt–water–CO2 interaction time. © 2019 Society of Chemical Industry and John Wiley & Sons, Ltd.

show abstract

Probabilistic Evaluation of Susceptibility to Fluid Injection-Induced Seismicity Based on Statistics of Fracture Criticality

et al. 2022

Self Cite

View full text Add to dashboard Cite

Fault reactivation and associated microseismicity pose a potential threat to industrial processes involving fluid injection into the subsurface. In this research, fracture criticality, defined as the gradient of critical fluid pressure change to trigger seismicity (Δpc/h), is proposed as a novel reservoir depth-independent metric of fault slip susceptibility. Based on statistics of the fracture criticality, a probabilistic evaluation framework for susceptibility to injection-induced seismicity was developed by integrating seismic observations and hydrogeological modelling of fluid injection operations for faulted reservoirs. The proposed seismic susceptibility evaluation method considers the injection-driven fluid pressure increase, the variability of fracture criticality, and regional fracture density. Utilising this methodology, the probabilistic distribution of fracture criticality was obtained to evaluate the potential for injection-induced seismicity in both fault and off-fault zones at the Hellisheiði geothermal site, Iceland. It has been found that the fracture criticality within both fault and off-fault zones shows natural variability (mostly ranging between 0.001 and 2.0 bar/km), and that fault zones tend to be characterised by larger fracture criticality values than the off-faut zones. Fracture criticality values estimated within each zone roughly follow a Gaussian distribution. Fault zones around five geothermal fluid re-injection wells at the site were estimated to have relatively high probability of seismic event occurrence, and these regions experienced high levels of induced seismicity over the microseismic monitoring period. The seismotectonic state estimated for each zone is generally consistent with the forecasted susceptibility to seismicity based on statistics of fracture criticality.

show abstract

The geology and hydrology of the CarbFix2 site, SW-Iceland

Cited by 30 publications

References 19 publications

Preliminary geochemical investigation of a possible CO₂ injection in the Ungaran geothermal field, Indonesia: equilibrium and kinetic modeling

Preliminary geochemical investigation of a possible CO₂ injection in the Ungaran geothermal field, Indonesia: equilibrium and kinetic modeling

Carbon capture induced changes in Deccan basalt: a mass‐balance approach

Probabilistic Evaluation of Susceptibility to Fluid Injection-Induced Seismicity Based on Statistics of Fracture Criticality

Contact Info

Product

Resources

About

The geology and hydrology of the CarbFix2 site, SW-Iceland

Cited by 30 publications

References 19 publications

Preliminary geochemical investigation of a possible CO2 injection in the Ungaran geothermal field, Indonesia: equilibrium and kinetic modeling

Preliminary geochemical investigation of a possible CO2 injection in the Ungaran geothermal field, Indonesia: equilibrium and kinetic modeling

Carbon capture induced changes in Deccan basalt: a mass‐balance approach

Probabilistic Evaluation of Susceptibility to Fluid Injection-Induced Seismicity Based on Statistics of Fracture Criticality

Contact Info

Product

Resources

About

Preliminary geochemical investigation of a possible CO₂ injection in the Ungaran geothermal field, Indonesia: equilibrium and kinetic modeling

Preliminary geochemical investigation of a possible CO₂ injection in the Ungaran geothermal field, Indonesia: equilibrium and kinetic modeling