An experimental investigation of hydraulic behaviour of fractures and joints in granitic rock

Chen, Zhixi; Narayan, Shashank; Yang, Zon-Yee; Rahman, Sheik S.

doi:10.1016/s1365-1609(00)00039-3

Cited by 199 publications

(131 citation statements)

References 16 publications

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“…For example, if a M ∼4 earthquake were to be triggered by CO 2 sequestration (17)-an event that would be widely felt in a populated area but for which shaking would be unlikely to cause harm or damage-it would be associated with several centimeters of slip on a fault several kilometers in size. Because laboratory studies show that just a few millimeters of shear displacement are capable of enhancing fracture and joint permeability (18), several centimeters of slip would be capable of creating a permeable hydraulic pathway that could compromise the seal integrity of the CO 2 reservoir and potentially reach the near surface.…”

Section: Triggered Earthquakes and Seal Integritymentioning

confidence: 99%

Earthquake triggering and large-scale geologic storage of carbon dioxide

Zoback¹,

Gorelick

2012

Proc. Natl. Acad. Sci. U.S.A.

706

380

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. We argue here that there is a high probability that earthquakes will be triggered by injection of large volumes of CO 2 into the brittle rocks commonly found in continental interiors. Because even small-to moderate-sized earthquakes threaten the seal integrity of CO 2 repositories, in this context, large-scale CCS is a risky, and likely unsuccessful, strategy for significantly reducing greenhouse gas emissions.carbon sequestration | climate change | triggered earthquakes

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Section: Triggered Earthquakes and Seal Integritymentioning

confidence: 99%

Earthquake triggering and large-scale geologic storage of carbon dioxide

Zoback¹,

Gorelick

2012

Proc. Natl. Acad. Sci. U.S.A.

706

380

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“…Because of the lack of information about far field stresses, the horizontal stresses are estimated based on overburden stress (Zoback 2010). The fracture aperture is initialized using a value of 0.04 mm and its changes due to stresses effect are calculated using shear slippage criteria similar to Chen et al (2000). Chen et al's (2000) criteria was based on the concept that when the pressure inside fracture becomes higher than the given in situ stress, the fracture opens and its surfaces no longer remain in contact.…”

Section: Study Of Water Coning Phenomenonmentioning

confidence: 99%

Evaluation of water coning phenomenon in naturally fractured oil reservoirs

Azim

2015

J Petrol Explor Prod Technol

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Water coning is a complex phenomenon observed in conventional and unconventional reservoirs. This phenomenon takes place due to the imbalance between viscous and gravitational forces during simultaneous production of oil and water. In a fractured reservoir, controlling of water coning is challenging due to the complexity originates from large number of uncertain variables associated with such reservoirs system. This paper presents a fully coupled poroelastic multiphase fluidflow numerical model to provide a new insight and understanding of water coning phenomenon in naturally fractured reservoir under effect of various rock and fluid properties. These properties include anisotropy ratio, fracture permeability, mobility ratio, and production rate. The simulation workflow of the developed numerical model is based on upstream flux weighted finite element discretization method and a new hybrid methodology, which combines single-continuum and discrete fracture approach. Moreover, the capillary pressure effect is included during the discretization of the partial differential equations of multiphase fluid flow. The numerical system is decoupled using implicit pressure and explicit saturation (IMPES) approach. Discretization of water saturation equation using standard finite element method produces solution with spatial oscillations due to its hyperbolic nature. To overcome this, Galerkin's least square technique (GLS) is employed to stabilize the equation solutions. The developed numerical scheme is validated successfully against Eclipse-100 and then applied to a case study of fractured reservoir taken from Southern Vietnam. The results showed that the break through time is very sensitive to the distributions of fracture network, anisotropy ratio between fracture horizontal, vertical permeability, and mobility ratio. Furthermore, it has been concluded that aquifer strength has a little effect on coning behavior during oil production process.

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“…Regarding the issue raised by Zoback and Gorelick 1 that induced seismicity will lead to compromise of cap rock integrity and potential leakage of CO 2 , the authors rely on the study of Chen et al 3 to motivate concern that small earthquakes can lead to compromise of cap rock integrity in GCS systems. However, using the Chen et al 3 study, which was for granitic rock, to make assertions about the permeability of faults and fractures in sedimentary rock is questionable.…”

Section: Curtis M Oldenburg Earth Sciences Division Lbnlmentioning

confidence: 99%

“…However, using the Chen et al 3 study, which was for granitic rock, to make assertions about the permeability of faults and fractures in sedimentary rock is questionable. In fact, as Zoback and Gorelick 1 describe, largescale GCS sites are proposed for sedimentary basins where the cap rock is typically shale or mudstone rather than crystalline granite.…”

Section: Curtis M Oldenburg Earth Sciences Division Lbnlmentioning

confidence: 99%

“…As for concerns about cap rock integrity related to induced seismicity, there is not sufficient evidence to conclude that induced seismicity and related reactivation of faults in shale or mudstone will compromise cap-rock integrity. There is clearly need for more work to expand the knowledge base beyond the Chen et al 3 study, which is not directly applicable to GCS sites.…”

Section: Curtis M Oldenburg Earth Sciences Division Lbnlmentioning

confidence: 99%

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