scholarly journals Effect of Cap Rock Thickness and Permeability on Geological Storage of CO2: Laboratory Test and Numerical Simulation

2014 ◽  
Vol 32 (6) ◽  
pp. 943-964 ◽  
Author(s):  
Zhixi Chen ◽  
Fengde Zhou ◽  
Sheikh S. Rahman
Keyword(s):  
Numerical Simulation ◽  
Laboratory Test ◽  
Geological Storage ◽  
Cap Rock

scholarly journals Experimental and Numerical Evaluation of Hydraulic Fracturing under High Temperature and Embedded Fractures in Large Concrete Samples

Water ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 3171
Author(s):  
Liangliang Guo ◽  
Zihong Wang ◽  
Yanjun Zhang ◽  
Zhichao Wang ◽  
Haiyang Jiang
Keyword(s):  
Numerical Simulation ◽  
High Temperature ◽  
Hydraulic Fracturing ◽  
Laboratory Test ◽  
High Temperatures ◽  
Large Scale ◽  
Hydraulic Fractures ◽  
Enhanced Geothermal Systems ◽  
Geothermal Systems ◽  
Fracture Density

In order to study the mechanism of hydraulic fracturing in enhanced geothermal systems, we analyzed the influence of high temperatures and embedded fractures on the initiation and propagation of hydraulic fractures using a laboratory test and numerical simulation. The analysis was conducted via large-scale true triaxial hydraulic fracturing tests with acoustic emission monitoring. Moreover, we discussed and established the elastic-plastic criterion of hydraulic fracturing initiation. The corresponding fracturing procedure was designed and embedded into the FLAC3D software. Then, a numerical simulation was conducted and compared with the laboratory test to verify the accuracy of the fracturing procedure. The influence of high temperatures on hydraulic fracturing presented the following features. First, multi-fractures were created, especially in the near-well region. Second, fracturing pressure, extension pressure, and fracture flow resistance became larger than those at room temperature. 3D acoustic fracturing emission results indicated that the influence of the spatial distribution pattern of embedded fractures on hydraulic fracturing direction was larger than that of triaxial stress. Furthermore, the fracturing and extension pressures decreased with the increase of embedded fracture density. For hydraulic fracturing in a high temperature reservoir, a plastic zone was generated near the borehole, and this zone increased as the injection pressure increased until the well wall failed.

Numerical Simulation Model of Geological Storage of Carbon Dioxide in Onshore Gippsland Basin, Victoria

2011 ◽  
Author(s):  
Ahmed Tawfiq Buali ◽  
Mohammed Hussain Alali ◽  
Mustafa Radhi Alzaid ◽  
Mark Alexander Bunch ◽  
Saju Menacherry
Keyword(s):  
Carbon Dioxide ◽  
Numerical Simulation ◽  
Simulation Model ◽  
Geological Storage ◽  
Gippsland Basin

Numerical Simulation of Compressive Experiment of Coal Seam in Deep Underground for Geological Storage of Carbon Dioxide

2013 ◽  
Vol 387 ◽  
pp. 189-192
Author(s):  
Feng Shan Han ◽  
Xin Li Wu
Keyword(s):  
Numerical Simulation ◽  
Coal Seam ◽  
Shear Failure ◽  
Lateral Pressure ◽  
Failure Process ◽  
Absorption Capacity ◽  
Geological Storage ◽  
Modeling Tools ◽  
Storage Reservoirs ◽  
Deep Underground

The geological storage of has been recognized as an important strategy to reduce emission in the atmosphere. Coal seam has strong absorption capacity for , hence the coal seam can be used as geological storage reservoirs, simple and easy to use modeling tools would be valuable in assessing the performance of deep underground geological storage. In this paper failure process of coal seam in deep underground under triaxial compressive experiment is presented by numerical simulation. That is of significance and valuable to those subjects of investigation of strength of coal seam in deep underground and mechanism of propagation and coalescence and evolvement of crack for coal seam in deep underground, it is shown by numerical simulation that failure shape of coal seam in deep underground under triaxial compressive experiment of lateral pressure of 25Mpa is typically shear failure, and characteristic of deformation is obviously elastic-brittle, which is significance to understand the performance of the coal seam in deep underground

scholarly journals Numerical Simulation of Natural Convection in Heterogeneous Porous media for CO2 Geological Storage

2012 ◽  
Vol 95 (1) ◽  
pp. 25-54 ◽  
Author(s):  
Panneerselvam Ranganathan ◽  
Rouhollah Farajzadeh ◽  
Hans Bruining ◽  
Pacelli L. J. Zitha
Keyword(s):  
Numerical Simulation ◽  
Porous Media ◽  
Natural Convection ◽  
Heterogeneous Porous Media ◽  
Geological Storage ◽  
Co2 Geological Storage

scholarly journals Impact assessment of interlayers on geological storage of carbon dioxide in Songliao Basin

2019 ◽  
Vol 74 ◽  
pp. 85 ◽  
Author(s):  
Deping Zhang ◽  
Chengkai Fan ◽  
Dongqin Kuang
Keyword(s):  
Physical Properties ◽  
Songliao Basin ◽  
Type I ◽  
Type Ii ◽  
Geological Storage ◽  
Storage Efficiency ◽  
Reservoir Prediction ◽  
Injection Volume ◽  
Sand Body ◽  
Cap Rock

Reservoirs in the Songliao Basin are characterized by strong heterogeneity, which increases the difficulty of exact reservoir prediction. The clay interlayer developed in the reservoir is an important factor affecting the heterogeneity of the reservoir. Using the reservoir numerical simulation technology, an attempt has been made to investigate the storage efficiency during CO2 sequestration in Songliao Basin considering different types of interlayer in underground formations. Results indicate that type I interlayer, with a large thickness embedded between the two sand bodies has function of shunting and blocking to alleviate the impacts on cap rock. The type II interlayer has a small thickness and locates inside a single sand body, with poor physical properties and continuity, which has the same blocking effect on CO2 distribution and moderating influence on the cap rock. The physical properties of type III interlayer are same as the type II interlayer, but it has uneven distribution and poor continuity. In addition, three schemes of perforated zone were designed and their effects on CO2 storage efficiency and stability were studied. For a single reservoir, the scheme I is to perforate a whole reservoir, which is more conducive to maintain the reservoir’s stability. For multiple sets of “single-reservoir”, the scheme II can be preferentially selected to perforate the reservoir section below the interlayer when the injection volume is small. However, the scheme III can be used to perforate the interlayer and the reservoir below that when the injection volume is large. The study is beneficial to provide guidance and advice for selecting a suitable CO2 geological storage and reduce the risk of CO2 leakage.

Seasonal Soil Freezing Characters in Daxinganling

2013 ◽  
Vol 652-654 ◽  
pp. 1668-1672
Author(s):  
Lin Ding ◽  
Yan Jie Liu ◽  
Yi Mei Min
Keyword(s):  
Thermal Conductivity ◽  
Numerical Simulation ◽  
Moisture Content ◽  
Laboratory Test ◽  
Transition Function ◽  
Ground Temperature ◽  
Soil Freezing ◽  
Seasonal Freezing ◽  
Freezing Soil ◽  
Water Behavior

For understanding the transport of groundwater existing in the seasonal freezing soil，laboratory test and field monitoring (frozen depth、moisture content and ground temperature in five months) were carried out in Daxinganling. A translocation model is built to analyze water behavior. The result shows that thermal conductivity will increase approximately one percent when temperature decreases 1°C. A transition function is used to prevent non-convergence in the numerical simulation. The simulation proves that the modified numerical simulation can reveal the law of moisture and heat translocation, and further offer guidance in practice.

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