Degradation of cement at the reservoir/cement interface from exposure to carbonated brine

Duguid, Andrew; Radonjic, Mileva; Scherer, George W.

doi:10.1016/j.ijggc.2011.06.007

Cited by 101 publications

(77 citation statements)

References 16 publications

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“…R9: Sweatman et al (2009) (qualitative analysis without a calibration curve). R10: Duguid et al (2011). was in excellent condition and showed little evidence of corrosion. Carey et al (2007) suggested that the cement carbonation, with CO 2 intruding into the interfaces, prevents further degradation of the cement and casing.…”

Section: Introductionmentioning

confidence: 99%

Experimental assessment of well integrity for CO2 geological storage: Batch experimental results on geochemical interactions between a CO2–brine mixture and a sandstone–cement–steel sample

Mito

Xue

Satoh

2015

International Journal of Greenhouse Gas Control

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Section: Introductionmentioning

confidence: 99%

Experimental assessment of well integrity for CO2 geological storage: Batch experimental results on geochemical interactions between a CO2–brine mixture and a sandstone–cement–steel sample

Mito

Xue

Satoh

2015

International Journal of Greenhouse Gas Control

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“…In our experiments, the sandstone played a role in mitigating direct contact between cement and fluid. Thus degradation of cement was reduced here in comparison with previous experiments using only cement [3][4].…”

Section: Results From Batch Experimentsmentioning

confidence: 47%

“…However subsequent laboratory experiments suggested both degradation and integrity of well cements. Batch experiments with Class G and H cements reported that cement surfaces were degraded even though the inside of the degradation zone had a less porous carbonated barrier [3][4][5]. One core-flood experiment, using a cement embedded casing material, showed that calcium and iron carbonates filled the annular gaps between the casing and cement [6].…”

Section: Introductionmentioning

confidence: 99%

Chemical Impacts of CO2 Flooding on Well Composite Samples: Experimental Assessment of Well Integrity for CO2 Sequestration

et al. 2013

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An abandoned well, completed without CO 2 resistant materials, is thought to be a potential pathway for CO 2 leakage to the surface. To examine the chemical impacts of a non-CO 2 resistant well, we prepared composite samples consisting of J-55 casing material, Portland cement and sandstone (referred to as simulated well sample ). Permeability of the simulated well sample decreased during a flow-through experiment using CO 2 -saturated brine. Precipitation of carbonate was found in both flow-through and batch experiments. The casing material was not degraded by CO 2 if bonding between the casing and cement was tight. The sandstone surrounding the cement therefore seemed to act as a buffer medium against CO 2 attack.

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“…Although variable, the cement alteration was significantly slower during the additional 8-month CO 2 3.10 reaction than the initial 5-month CO 2 reaction (Figure 3.8). This is attributed to slower diffusion of CO 2 groundwater into cement pores over time because the cement porosity and permeability gradually decreased as a result of progressive cement carbonation with increasing reaction time with CO 2 -saturated groundwater (Duguid et al 2011). After 5 months of CO 2 reaction, the fracture healing by CaCO 3 precipitation was completed by approximately 70% or less, but it was nearly 100% completed with the additional 8-month CO 2 reaction (Figure 3.8).…”

Section: Long-term Cement Carbonation and Fracture Healingmentioning

confidence: 99%

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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Degradation of cement at the reservoir/cement interface from exposure to carbonated brine

Cited by 101 publications

References 16 publications

Experimental assessment of well integrity for CO2 geological storage: Batch experimental results on geochemical interactions between a CO2–brine mixture and a sandstone–cement–steel sample

Experimental assessment of well integrity for CO2 geological storage: Batch experimental results on geochemical interactions between a CO2–brine mixture and a sandstone–cement–steel sample

Chemical Impacts of CO2 Flooding on Well Composite Samples: Experimental Assessment of Well Integrity for CO2 Sequestration

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

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