25 research outputs found
Coupled Dynamic Flow and Geomechanical Simulations for an Integrated Assessment of CO2 Storage Impacts in a Saline Aquifer
Pore pressure variation resulting from geological CO2 storage may compromise
reservoir, caprock and fault integrity. Therefore, we investigate the
mechanical impact of industrial-scale CO2 storage at a prospective Danish site
by coupled 3D hydro-mechanical simulations carried out by two independent
modelling groups. Even though the two chosen modelling strategies are not
identical, simulation results demonstrate that storage integrity is maintained
at any time. Vertical displacements are mainly determined by hydraulic fault
conductivity influencing spatial pore pressure elevation. The introduced fault
zone implementation in the hydro- mechanical model allows for localization of
potential leakage pathways for formation fluids along the fault plane
Carbon dioxide storage options for the COACH Project in the Bohai Basin, China
The Cooperation Action Carbon Capture and Storage China-EU project (COACH) is a three-year EC Framework 6
co-funded collaborative project with Chinese and EU partners investigating geological storage options in the Bohai
Basin, China. This paper discusses interim assessments of storage potential for the Dagang oilfield complex (Tianjin
Municipality), deep saline aquifers in the Jiyang depression (Shandong province) and the Kailuan coalfield (Hebei
Province). Source-sink matching options are also discussed using large ‘point source’ data collected for the
Shandong Province
How to Characterize a Potential Site for CO
The paper demonstrates how a potential site for CO2 storage can be evaluated up to a sufficient level of characterization for compiling a storage permit application, even if the site is only sparsely explored. The focus of the paper is on a risk driven characterization procedure. In the initial state of a site characterization process with sparse data coverage, the regional geological and stratigraphic understanding of the area of interest can help strengthen a first model construction for predictive modeling. Static and dynamic modeling in combination with a comprehensive risk assessment can guide the different elements needed to be evaluated for fulfilling a permit application. Several essential parameters must be evaluated; the storage capacity for the site must be acceptable for the project life of the operation, the trap configuration must be efficient to secure long term containment, the injectivity must be sufficient to secure a longstanding stable operation and finally a satisfactory and operational measuring strategy must be designed. The characterization procedure is demonstrated for a deep onshore aquifer in the northern part of Denmark, the Vedsted site. The site is an anticlinal structural closure in an Upper Triassic – Lower Jurassic sandstone formation at 1 800-1 900 m depth
How to Characterize a Potential Site for CO2 Storage with Sparse Data Coverage – a Danish Onshore Site Case
The paper demonstrates how a potential site for CO2 storage can be evaluated up to a sufficient level of characterization for compiling a storage permit application, even if the site is only sparsely explored. The focus of the paper is on a risk driven characterization procedure. In the initial state of a site characterization process with sparse data coverage, the regional geological and stratigraphic understanding of the area of interest can help strengthen a first model construction for predictive modeling. Static and dynamic modeling in combination with a comprehensive risk assessment can guide the different elements needed to be evaluated for fulfilling a permit application. Several essential parameters must be evaluated; the storage capacity for the site must be acceptable for the project life of the operation, the trap configuration must be efficient to secure long term containment, the injectivity must be sufficient to secure a longstanding stable operation and finally a satisfactory and operational measuring strategy must be designed. The characterization procedure is demonstrated for a deep onshore aquifer in the northern part of Denmark, the Vedsted site. The site is an anticlinal structural closure in an Upper Triassic – Lower Jurassic sandstone formation at 1 800-1 900 m depth
Permeability, compressibility and porosity of Jurassic shale from the Norwegian-Danish Basin
Carboniferous basin in Holm Land records local exhumation of the North-East Greenland Caledonides:implications for the detrital zircon signature of a collisional orogen
Coupled Hydro-Mechanical Simulations of CO2 Storage Supported by Pressure Management Demonstrate Synergy Benefits from Simultaneous Formation Fluid Extraction
We assessed the synergetic benefits of simultaneous formation fluid extraction during CO2 injection for reservoir pressure management by coupled hydro-mechanical simulations at the prospective Vedsted storage site located in northern Denmark. Effectiveness of reservoir pressure management was investigated by simulation of CO2 storage without any fluid extraction as well as with 66% and 100% equivalent volume formation fluid extraction from four wells positioned for geothermal heat recovery. Simulation results demonstrate that a total pressure reduction of up to about 1.1 MPa can be achieved at the injection well. Furthermore, the areal pressure perturbation in the storage reservoir can be significantly decreased compared to the simulation scenario without any formation fluid extraction. Following a stress regime analysis, two stress regimes were considered in the coupled hydro-mechanical simulations indicating that the maximum ground surface uplift is about 0.24Â m in the absence of any reservoir pressure management. However, a ground uplift mitigation of up to 37.3% (from 0.24Â m to 0.15Â m) can be achieved at the injection well by 100% equivalent volume formation fluid extraction. Well-based adaptation of fluid extraction rates can support achieving zero displacements at the proposed formation fluid extraction wells located close to urban infrastructure. Since shear and tensile failure do not occur under both stress regimes for all investigated scenarios, it is concluded that a safe operation of CO2 injection with simultaneous formation fluid extraction for geothermal heat recovery can be implemented at the Vedsted site