A mechanism of fluid exchange associated to CO2 leakage along activated fault during geologic storage

Zhang, Lisong; Zhang, Shiyan; Jiang, Weizhai; Wang, Zhiyuan; Li, Jing; Bian, Yinghui

doi:10.1016/j.energy.2018.09.104

Cited by 24 publications

(3 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Fractures in the reservoir are usually not conducive to CO 2 storage, which may lead to CO 2 leakage and fault activation. − However, according to the previous analysis, if hydraulic fractures are created in the low layer or low permeability layer, it may improve the sweep uniformity of CO 2 and increase the injectability. Therefore, this section studies the effect of hydraulic fractures on CO 2 storage.…”

Section: Resultsmentioning

confidence: 99%

Influence of Reservoir Spatial Heterogeneity on a Multicoupling Process of CO₂Geological Storage

Gao,

Yang,

Shen

et al. 2023

Energy Fuels

View full text Add to dashboard Cite

As a means of delaying climate change, injecting carbon dioxide (CO2) into geological structures can be an effective carbon capture, utilization, and storage (CCUS) strategy. All geological structures are naturally spatial heterogeneity, which can significantly affect fluid flow and heat transfer, thereby affecting CO2 storage. We modeled fluid flow and heat transfer in 12 CO2 storage scenarios with spatially heterogeneous reservoirs using a thermal-hydraulic-mechanical (THM) coupled model of a 3D wellbore-reservoir system. CO2 injectability and distribution uniformity were studied in relation to reservoir vertical heterogeneity and interlayers. The optimization method of engineering parameters is discussed. Positive rhythm reservoirs exhibit more uniform CO2 distribution laterally under gravity than reverse rhythm reservoirs. In high permeability ratio reservoirs, the low-temperature zone has a longer transfer distance and CO2 is more likely to be injected, but channeling is prone to occur. Reservoir porosity has little effect on reservoir CO2 injectability and temperature distribution. The interlayers will weaken the influence of gravity and reduce the CO2 injectability while providing additional storage volume. Injecting CO2 at a lower temperature and mass flow will increase injectability. The uniform distribution of CO2 laterals is most effectively improved by hydraulic fracturing. Using low thermal conductivity materials for the wellbore insulation to reduce heat replenishment from the surrounding formation is critical.

show abstract

Section: Resultsmentioning

confidence: 99%

Influence of Reservoir Spatial Heterogeneity on a Multicoupling Process of CO₂Geological Storage

Gao,

Yang,

Shen

et al. 2023

Energy Fuels

View full text Add to dashboard Cite

show abstract

“…Fractured domains are a particular type of heterogeneity. Fractures can generate preferential flow pathways and may increase the possibility of CO2 leakage from the geological formation, which can cause significant ecological risks (Zhang et al, 2018). Several ecological consequences of CO2 leakage on marine ecosystems are discussed in Molari e al.…”

Section: Introductionmentioning

confidence: 99%

Convective-reactive transport of dissolved CO2 in fractured-geological formations

Shafabakhsh

Ataie-Ashtiani

Simmons

et al. 2021

International Journal of Greenhouse Gas Control

View full text Add to dashboard Cite

“…If significant amounts of anthropogenic CO 2 are injected into deep reservoir formations, the geomechanical disturbance of the host rocks is altered in response to the pore pressure buildups, and any potential variations (however small) will induce some stress-and-strain changes in and around the injection zones, which might result in detectable ground-surface deformations. − It has been pointed out in recent literature that CO 2 injection can trigger such an increase in pore pressure; however, injected CO 2 would potentially rise through porous rocks and migrate toward the surface, eventually leaking into the atmosphere as a result of CO 2 buoyancy unless trapped by impermeable layers (such as shale or mudstone). − Induced geomechanical deformation by CO 2 injection will create or reactivate networks of fractures in the sealing caprock, thereby providing possible pathways for CO 2 to leak out of the target formations. − This process has been observed at the typical commercial-scale CO 2 storage sites at Sleipner, Weyburn, and In Salah and may pose a risk to storage security and neighboring residents. For example, Vasco et al, and Morris et al , reported that areas around the injection wells were deformed (with a surface displacement of approximately 5 mm/a) soon after CO 2 injection was initiated; these observations were made using the InSAR (interferometric synthetic aperture radar) satellite data reporting in the In Salah CCS site, Algeria.…”

Section: Introductionmentioning

confidence: 99%

Optical Sensing of CO₂ Geological Storage Using Distributed Fiber-Optic Sensor: From Laboratory to Field-Scale Demonstrations

et al. 2020

View full text Add to dashboard Cite

An innovative monitoring system using distributed fiber optical sensing (DFOS) technology based on hybrid Brillouin–Rayleigh backscattering is first proposed to measure small strain profiles from core-scale experiments to field tests. The surface of a sandstone specimen is twined and glued with one single-mode fiber (SMF) as well as four conventional strain gauges. A preliminary laboratory experiment is implemented to testify to the sensing effectiveness of this proposed hybrid DFOS system. Laboratory experiments indicate that the measured strain via SMF along the heterogeneous Tako sandstone core surface coincides well with conventional strain gauges and better tracks injected CO2 fronts. Moreover, this novel DFOS-based optical fiber cable has been deployed behind the well casing for detecting impacted zones along the well depth direction in an actual 300 m-deep field well. Field testing shows that the extent of the deformed zone induced by injected CO2 is successfully monitored and quantified in terms of measured in situ strain profiles. This first-hand hybrid DFOS system and lab-field findings can quantitatively evaluate wellbore–caprock integrity by providing real-time in situ strain signals in various Earth geoenergy-related fluids injection, storage, and extraction sites.

show abstract

A mechanism of fluid exchange associated to CO2 leakage along activated fault during geologic storage

Cited by 24 publications

References 44 publications

Influence of Reservoir Spatial Heterogeneity on a Multicoupling Process of CO₂Geological Storage

Influence of Reservoir Spatial Heterogeneity on a Multicoupling Process of CO₂Geological Storage

Convective-reactive transport of dissolved CO2 in fractured-geological formations

Optical Sensing of CO₂ Geological Storage Using Distributed Fiber-Optic Sensor: From Laboratory to Field-Scale Demonstrations

Contact Info

Product

Resources

About

A mechanism of fluid exchange associated to CO2 leakage along activated fault during geologic storage

Cited by 24 publications

References 44 publications

Influence of Reservoir Spatial Heterogeneity on a Multicoupling Process of CO2Geological Storage

Influence of Reservoir Spatial Heterogeneity on a Multicoupling Process of CO2Geological Storage

Convective-reactive transport of dissolved CO2 in fractured-geological formations

Optical Sensing of CO2 Geological Storage Using Distributed Fiber-Optic Sensor: From Laboratory to Field-Scale Demonstrations

Contact Info

Product

Resources

About

Influence of Reservoir Spatial Heterogeneity on a Multicoupling Process of CO₂Geological Storage

Influence of Reservoir Spatial Heterogeneity on a Multicoupling Process of CO₂Geological Storage

Optical Sensing of CO₂ Geological Storage Using Distributed Fiber-Optic Sensor: From Laboratory to Field-Scale Demonstrations