A Profitability Study of CO2-EOR and Subsequent CO2 Storage in the North Sea under Low Oil Market Prices

Economic threshold of CO2-EOR and CO2 storage in the North Sea: A case study of the Claymore, Scott and Buzzard oil fields

International Journal of Greenhouse Gas Control ◽

10.1016/j.ijggc.2018.08.013 ◽

2018 ◽

Vol 78 ◽

pp. 271-285 ◽

Cited By ~ 4

Author(s):

Kris Welkenhuysen ◽

Bruno Meyvis ◽

Rudy Swennen ◽

Kris Piessens

Keyword(s):

North Sea ◽

Co2 Storage ◽

Oil Fields ◽

Economic Threshold ◽

The North ◽

The North Sea ◽

Co2 Eor

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Enhanced ocean carbon storage from anaerobic alkalinity generation in coastal sediments

Biogeosciences ◽

10.5194/bg-6-267-2009 ◽

2009 ◽

Vol 6 (2) ◽

pp. 267-274 ◽

Cited By ~ 127

Author(s):

H. Thomas ◽

L.-S. Schiettecatte ◽

K. Suykens ◽

Y. J. M. Koné ◽

E. H. Shadwick ◽

...

Keyword(s):

North Sea ◽

Co2 Storage ◽

Global Scale ◽

Coastal Sediments ◽

Total Alkalinity ◽

Co2 Uptake ◽

Marginal Seas ◽

The North ◽

The North Sea ◽

Ocean Carbon

Abstract. The coastal ocean is a crucial link between land, the open ocean and the atmosphere. The shallowness of the water column permits close interactions between the sedimentary, aquatic and atmospheric compartments, which otherwise are decoupled at long time scales (≅ 1000 yr) in the open oceans. Despite the prominent role of the coastal oceans in absorbing atmospheric CO2 and transferring it into the deep oceans via the continental shelf pump, the underlying mechanisms remain only partly understood. Evaluating observations from the North Sea, a NW European shelf sea, we provide evidence that anaerobic degradation of organic matter, fuelled from land and ocean, generates total alkalinity (AT) and increases the CO2 buffer capacity of seawater. At both the basin wide and annual scales anaerobic AT generation in the North Sea's tidal mud flat area irreversibly facilitates 7–10%, or taking into consideration benthic denitrification in the North Sea, 20–25% of the North Sea's overall CO2 uptake. At the global scale, anaerobic AT generation could be accountable for as much as 60% of the uptake of CO2 in shelf and marginal seas, making this process, the anaerobic pump, a key player in the biological carbon pump. Under future high CO2 conditions oceanic CO2 storage via the anaerobic pump may even gain further relevance because of stimulated ocean productivity.

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Frictional Properties and Seismogenic Potential of Caprock Shales

Energies ◽

10.3390/en13236275 ◽

2020 ◽

Vol 13 (23) ◽

pp. 6275

Author(s):

Bahman Bohloli ◽

Magnus Soldal ◽

Halvard Smith ◽

Elin Skurtveit ◽

Jung Chan Choi ◽

...

Keyword(s):

Friction Coefficient ◽

North Sea ◽

Co2 Storage ◽

Test Procedure ◽

Shear Velocity ◽

Frictional Properties ◽

The North ◽

Slip Event ◽

The North Sea ◽

Direct Shear Apparatus

Fractures and faults are critical elements affecting the geomechanical integrity of CO2 storage sites. In particular, the slip of fractures and faults may affect reservoir integrity and increase potential for breach, may be monitored via the resulting seismicity. This paper presents an experimental study on shale samples from Draupne and Rurikfjellet formations from the North Sea and Svalbard, Norway, using a laboratory test procedure simulating the slip of fractures and faults under realistic stress conditions for North Sea CO2 storage sites. The motivation of the study is to investigate whether the slip along the fractures within these shales may cause detectable seismic events, based on a slip stability criterion. Using a direct shear apparatus, frictional properties of the fractures were measured during shearing, as a function of the shear velocity and applied stress normal to the fracture. We calculated the friction coefficient of the fractures during the different stages of the shear tests and analysed its dependency on shear velocity. Information on velocity-dependent friction coefficient and its evolution with increasing slip were then used to assess whether slip was stable (velocity-strengthening) or unstable (velocity-weakening). Results showed that friction coefficient for both Draupne and Rurikfjellet shales increased when the shear velocity was increased from 10 to 50 µm/s, indicating a velocity-strengthening behaviour. Such a behaviour implies that slip on fractures and faults within these formations may be less prone to producing detectable seismicity during a slip event. These results will have implications for the type of techniques to be used for monitoring reservoir and caprock integrity, for instance, for CO2 storage sites.

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CO2 Storage: Setting a Simple Bound on Potential Leakage through the Overburden in the North Sea Basin

Energy Procedia ◽

10.1016/j.egypro.2017.03.1597 ◽

2017 ◽

Vol 114 ◽

pp. 4411-4423 ◽

Cited By ~ 1

Author(s):

R.A. Chadwick ◽

G.A. Williams ◽

D.J. Noy

Keyword(s):

North Sea ◽

Co2 Storage ◽

The North ◽

The North Sea

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Re-using (Nearly) Depleted Oil and Gas Fields in the North Sea for CO2 Storage: Seizing or Missing a Window of Opportunity?

The Law of the Seabed ◽

10.1163/9789004391567_021 ◽

2020 ◽

pp. 454-480

Keyword(s):

North Sea ◽

Oil And Gas ◽

Co2 Storage ◽

Window Of Opportunity ◽

The North ◽

Oil And Gas Fields ◽

The North Sea ◽

Gas Fields

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Structural traps and seals for expanding CO2 storage in the northern Horda Platform, North Sea

10.31223/x5534h ◽

2021 ◽

Author(s):

Johnathon Osmond ◽

Mark Mulrooney ◽

Nora Holden ◽

Elin Skurtveit ◽

Jan Inge Faleide ◽

...

Keyword(s):

North Sea ◽

Co2 Storage ◽

Upper Jurassic ◽

Lower Jurassic ◽

Climate Mitigation ◽

Fault Rock ◽

Entire Study ◽

The North ◽

Major Fault ◽

The North Sea

The maturation of geological CCS along the Norwegian Continental Shelf is ongoing in the Norwegian North Sea, however, more storage sites are needed to reach climate mitigation goals by 2050. In order to augment the Aurora site and expand CO2 storage in the northern Horda Platform, regional traps and seals must be assessed to better understand the area’s potential. Here, we leverage wellbore and seismic data to map storage aquifers, identify structural traps, and assess possible top and fault seals associated with Lower and Upper Jurassic storage complexes in four major fault blocks. With respect to trap and seal, our results maintain that both prospective intervals represent viable CO2 storage options in various locations of each fault block. Mapping, modeling, and formation pressure analyses indicate that top seals are present across the entire study area, and are sufficiently thick over the majority of structural traps. Across-fault juxtaposition seals are abundant, but dominate the Upper Jurassic storage complexes. Lower Jurassic aquifers, however, are often upthrown against Upper Jurassic aquifers, but apparent across fault pressure differentials and moderate to high shale gouge ratio values correlate, suggesting fault rock membrane seal presence. Zones of aquifer self-juxtaposition, however, are likely areas of poor seal along faults. Overall, our results provide added support that the northern Horda Platform represents a promising location for expanding CO2 storage in the North Sea, carrying the potential to become a future injection hub for CCS in northern Europe.

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Enhanced ocean carbon storage from anaerobic alkalinity generation in coastal sediments

Biogeosciences Discussions ◽

10.5194/bgd-5-3575-2008 ◽

2008 ◽

Vol 5 (4) ◽

pp. 3575-3591 ◽

Cited By ~ 8

Author(s):

H. Thomas ◽

L.-S. Schiettecatte ◽

K. Suykens ◽

Y. J. M. Koné ◽

E. H. Shadwick ◽

...

Keyword(s):

North Sea ◽

Co2 Storage ◽

Global Scale ◽

Coastal Sediments ◽

Co2 Uptake ◽

Marginal Seas ◽

The North ◽

The North Sea ◽

Ocean Carbon ◽

Underlying Mechanisms

Abstract. The coastal ocean constitutes the crucial link between land, the open ocean and the atmosphere. Furthermore, its shallow water column permits close interactions between the sedimentary and atmospheric compartments, which otherwise are decoupled at short time scales (<1000 yr) in the open oceans. Despite the prominent role of the coastal oceans in absorbing atmospheric CO2 and transferring it into the deep oceans via the continental shelf pump, the underlying mechanisms remain only partly understood. Evaluating observations from the North Sea, a NW European shelf sea, we provide evidence that anaerobic degradation of organic matter, fuelled from land and ocean, generates alkalinity (AT) and increases the CO2 buffer capacity of seawater. At both the basin wide and annual scales anaerobic AT generation in the North Sea's tidal mud flat area irreversibly facilitates 7–10%, or taking into consideration benthic denitrification in the North Sea, 20–25% of the North Sea's overall CO2 uptake. At the global scale, anaerobic AT generation could be accountable for as much as 60% of the uptake of CO2 in shelf and marginal seas, making this process, the anaerobic pump, a key player in the biological carbon pump. Under future high CO2 conditions oceanic CO2 storage via the anaerobic pump may even gain further relevance because of stimulated ocean productivity.

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