Geochemical effects of impurities in CO2 on a sandstone reservoir

Koenen, M.; Tambach, Tim J.; Neele, Filip

doi:10.1016/j.egypro.2011.02.516

Cited by 26 publications

(16 citation statements)

References 2 publications

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“…This is consistent with previous studies of cement-CO 2 -H 2 S reaction, in which the cement alteration by H 2 S-CO 2 was similar to alteration by CO 2 alone, except for the sulfidation of ferrite (Jacquemet et al 2008;Kutchko et al 2011;Jacquemet et al 2012). The H 2 S reactivity with cement in this study was limited, probably because the effect of H 2 S on the pH of CO 2 -saturated water is minor in the absence of oxygen (Knauss et al 2005;Xu et al 2007;Koenen et al 2011). (Figure 3.9).…”

Section: Cement Alteration and Fracture Sealing By Co 2 -H 2 Ssupporting

confidence: 81%

Geochemical and Geomechanical Effects on Wellbore Cement Fractures: Data Information for Wellbore Reduced Order Model

Jung

Kabilan

et al. 2014

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SummaryThe primary objective of the National Risk Assessment Partnership (NRAP) program is to develop a defensible, generalized, and science-based methodology and platform for quantifying risk profiles at CO 2 injection and storage sites. The methodology must incorporate and define the scientific basis for assessing residual risks associated with long-term stewardship and help guide site operational decisionmaking and risk management. Development of an integrated and risk-based protocol will help minimize uncertainty in the predicted long-term behavior of the CO 2 storage site and thereby increase confidence in storage integrity. The risk profile concept has proven useful in conveying the qualitative evolution of risks for CO 2 injection and storage site. However, qualitative risk profiles are not sufficient for specifying long-term liability for CO 2 storage sites. Because there has been no science-based defensible and robust methodology developed for quantification of risk profiles for CO 2 injection and storage, NRAP has been focused on developing a science-based methodology for quantifying risk profiles for various risk proxies.Development of a site-specific risk profile comprises the development and application of a systemlevel methodology for quantitative probabilistic risk assessment that is based on integrated assessment models (IAMs). These IAMs will consist of reduced order models (ROMs) that describe the behavior of each of the components in the storage-site system (e.g., storage reservoir, seal integrity, wellbore integrity, other transport pathways, groundwater systems, etc.). These ROMs, in turn, will be based on detailed physical and chemical models that are calibrated and validated using laboratory and field data. ROMs for wellbore release account for multiphase flow in potential openings of wellbore materials (cement, rock, and casing). The flow of reactive fluid through cement fractures or along interfaces with casing or caprock is a potentially significant CO 2 leakage pathway and may be significantly modified by confining pressure. Much of this work is focusing on the flow through fractures and interfaces of wellbore cements to understand fluid flow with geochemical and geomechanical processes that may impact the fluid permeability. Fractures may occur during the original completion of the well, but pressure changes induced by wellbore operations, including the injection of CO 2 , likely propagate and generate additional fractures or openings in interfaces between wellbore materials (cement, rock, and casing).Experimental studies were conducted using batch reactors, X-ray microtomography (XMT), computational fluid dynamics (CFD) modeling, and geomechanical simulation using ABAQUS software to determine changes in cement fracture surfaces, fluid flow pathways and permeability, and cement fracture propagation with geochemical and geomechanical processes. Composite Portland cement-basalt caprock cores with artificial fractures, as well as neat Portland cement columns without fractures, were prepa...

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Section: Cement Alteration and Fracture Sealing By Co 2 -H 2 Ssupporting

confidence: 81%

Geochemical and Geomechanical Effects on Wellbore Cement Fractures: Data Information for Wellbore Reduced Order Model

Jung

Kabilan

et al. 2014

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“…From a geochemical perspective, Koenen and Tambach (2011) found that O 2 , H 2 S, SO 2 , and NO x were probably the most important impurities. Even at low concentrations, these impurities can influence the pH of the formation water, and disturb the geochemical and geomechanical properties of the reservoir rock, cap rock, and well bore material.…”

Section: Impurities/co-contaminants In Co 2 Captured For Geologic Seqmentioning

confidence: 99%

“…Also reviewed were CO 2 sequestration source stream concentrations evaluated by other researchers; it was found that Koenen et al (2010) had selected two possible CO 2 streams for investigating the effects of impurities on geologic sequestration (see Table 12). Yang et al (2007) examined the effect of three different injection gases (pure CO 2 , impure CO 2 containing 5.19 mol % O 2 , and impure CO 2 containing 9.99 mol % O 2 ) on miscible CO 2 flooding.…”

Section: Selection Of Co 2 Waste-stream Compositions For Use In Expermentioning

confidence: 99%

Identification and Selection of Major Carbon Dioxide Stream Compositions

Schmick¹

2011

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A critical component in the assessment of long-term risk from geologic sequestration of carbon dioxide (CO 2 ) is the ability to predict mineralogical and geochemical changes within storage reservoirs as a result of rock-brine-CO 2 reactions. Impurities and/or other constituents in CO 2 source streams selected for sequestration can affect both the chemical and physical (e.g., density, viscosity, interfacial tension) properties of CO 2 in the deep subsurface. The nature and concentrations of these impurities are a function of both the industrial source(s) of CO 2 , as well as the carbon capture technology used to extract the CO 2 and produce a concentrated stream for subsurface injection and geologic sequestration.This report summarizes the relative concentrations of CO 2 and other constituents in exhaust gases from major non-energy-related industrial sources of CO 2 . Assuming that carbon capture technology would remove most of the incondensable gases N 2 , O 2 , and Ar, leaving SO 2 and NO x as the main impurities, the authors of this report selected four test fluid compositions for use in geochemical experiments. These included the following: 1) a pure CO 2 stream representative of food-grade CO 2 used in most enhanced oil recovery projects; 2) a test fluid composition containing low concentrations (0.5 mole %) SO 2 and NO x (representative of that generated from cement production); 3) a test fluid composition with higher concentrations (2.5 mole %) of SO 2 ; and 4) test fluid composition containing 3 mole % H 2 S. v

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“…The content of SO 2 contained in captured CO 2 is generally limited to less than 100 ppm [12]. However, the content of SO 2 in a storage aquifer can be increased by accumulating SO 2 locally with a structural trap or mass transfer limit [11,14]. This implies that if the accumulation of SO 2 occurs in an area of storage aquifers, the pH may maintain a low level due to insufficient buffering capacity.…”

Section: Phmentioning

confidence: 99%

“…However, to the best of our knowledge, most studies on the effect of SO 2 have been performed in rocks containing Ca-rich minerals (e.g., calcite and anorthite), easily buffering the pH [4,6,8,[12][13][14][15][16]. These studies showed that SO 2 did not largely influence the alteration of reservoir rocks because pH was quickly buffered enough to prevent significant dissolution of silicate minerals.…”

Section: Introductionmentioning

confidence: 97%

Impact of SO₂ on Alteration of Reservoir Rock with Ca-Deficient Conditions and Poor Buffering Capacity under a CO₂ Geologic Storage Condition

et al. 2018

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The objective of this study is to evaluate the impact of SO 2 -CO 2 -water-rock interaction on the alteration of a reservoir rock having Ca-deficient conditions and little buffering capacity and its implication for porosity change near the injection well from a CO 2 storage pilot site, Republic of Korea. For our study, three cases of experimental and geochemical modeling were carried out (pure CO 2 , 0.1% SO 2 in CO 2 , and 1% SO 2 in CO 2 , resp.) under realistic geologic storage conditions. Our results show that SO 2 accelerated waterrock interactions by lowering the pH. In the 1% SO 2 case, pH remained less than 2 during the experiments because of insufficient buffering capacity. Sulfate minerals were not precipitated because of an insufficient supply of Ca. Because the total volume of precipitated secondary minerals was less than that of the dissolved primary minerals, the porosity of rock increased in all cases. Chlorite largely contributed to the decrease in total rock volume although it formed only 4.8 wt.% of the rock. Our study shows that the coinjection of a certain amount of SO 2 at CO 2 storage reservoirs without carbonate and Ca-rich minerals can significantly increase the porosity by enhancing water-rock interactions. This procedure can be beneficial to CO 2 injection under some conditions.

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Geochemical effects of impurities in CO2 on a sandstone reservoir

Cited by 26 publications

References 2 publications

Geochemical and Geomechanical Effects on Wellbore Cement Fractures: Data Information for Wellbore Reduced Order Model

Geochemical and Geomechanical Effects on Wellbore Cement Fractures: Data Information for Wellbore Reduced Order Model

Identification and Selection of Major Carbon Dioxide Stream Compositions

Impact of SO₂ on Alteration of Reservoir Rock with Ca-Deficient Conditions and Poor Buffering Capacity under a CO₂ Geologic Storage Condition

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Geochemical effects of impurities in CO2 on a sandstone reservoir

Cited by 26 publications

References 2 publications

Geochemical and Geomechanical Effects on Wellbore Cement Fractures: Data Information for Wellbore Reduced Order Model

Geochemical and Geomechanical Effects on Wellbore Cement Fractures: Data Information for Wellbore Reduced Order Model

Identification and Selection of Major Carbon Dioxide Stream Compositions

Impact of SO2 on Alteration of Reservoir Rock with Ca-Deficient Conditions and Poor Buffering Capacity under a CO2 Geologic Storage Condition

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Impact of SO₂ on Alteration of Reservoir Rock with Ca-Deficient Conditions and Poor Buffering Capacity under a CO₂ Geologic Storage Condition