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Showing 1 to 20 of 32 for “"Fracture networks"”.
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Transport in lattice fracture networks : concentration mean and variance
We study transport in fractured systems using a stochastic particle tracking approach. We represent a fractured system as a two-dimensional lattice network system where the transport velocity in each fracture is a random variable. Our goal is to develop an exact effective macroscopic model for the …
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Classical and Quantum Computational Methods for Predicting Fluid Transport in Fracture Networks
… predictions for gas transport in 3D discrete fracture networks. This provides accurate estimates while offering substantial savings over computationally intensive high-fidelity simulations. Additionally, we study multi-fidelity modeling through the formulation of linear Gaussian networks that …
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Fracture Modeling and Flow Behavior in Shale Gas Reservoirs Using Discrete Fracture Networks
Fluid flow process in fractured reservoirs is controlled primarily by the connectivity of fractures. The presence of fractures in these reservoirs significantly affects the mechanism of fluid flow. They have led to problems in the reservoir which results in early water breakthroughs, reduced …
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Simulating gas production from hydraulic fracture networks : a case study of the Barnett shale
… is believed to create longer and more complex fracture networks, contacting much greater surface areas of the reservoir while minimizing the fracture face damage through the use of low viscosity fluids with no gel solids. Fracture mapping research in the Barnett shale has shown that the …
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Fracture networks and fault zone features in a deep water sandstone, Brushy Canyon formation, West Texas
Includes bibliographical references (pages 208-225).
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Hydraulic-fracturing induced seismicity in Alberta, Canada: Analysis and interpretation using dense local arrays
… hydraulic fracturing stages reveals that natural fracture networks within the Ireton Shale, overlying the target Duvernay Formation, provided permeable conduits for an expanding region of elevated pore pressure. Using simple diffusive modelling, it is shown that these fracture networks allowed …
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Coal mass rating with regards to outburst and coal burst
… concentrations, where the carbonates fill the fractures in the coal mass. In circumstance, the infilling of the fractures by the carbonates is observed to bond coal clasts. The first hypothesis concluded that elevated carbonate concentration in a coal mass was a primary indicator of bonding but …
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Comparative Lineament and Geomorphic Analysis of Chaotic Terrains and Noctis Labyrinthus, Mars
… Chaotic terrains are a group of polygonally-fractured surface features commonly associated with subsidence due to rapid fluid loss within the subsurface. Polygonal surface patterns are seen at both sites, where geometric topographic highs are bounded by low troughs. Lineaments, topography, …
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Model Calibration and Performance Optimization Using Multiple-Point Geostatistics and Machine Learning Techniques
… some critical heterogeneities (i.e., complex fracture networks) present in unconventional tight and shale reservoirs. This extension allows us to apply the developed cluster-aided workflow for history matching the production data from multiple-fractured horizontal wells in future studies. …
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Elastic Waves Along a Fracture Intersection
<p>Fractures and fracture networks play a significant role in the subsurface hydraulic connectivity within the Earth. While a significant amount of research has been performed on the seismic response of single fractures and sets of fractures, few studies have examined the effect of fracture …
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Mobility control of chemical EOR fluids using foam in highly fractured reservoirs
Highly fractured and vuggy oil reservoirs represent a challenge for enhanced oil recovery (EOR) methods. The fractured networks provide flow paths several orders of magnitude greater than the rock matrix. Common enhanced oil recovery methods, including gases or low viscosity liquids, are used to …
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A Risk-Based Pillar Design Approach for Improving Safety in Underground Stone Mines
… to account for the spatial variability of fracture networks. This work presents a risk-based pillar design framework that enables to characterize the effect of discontinuities in pillar strength, as well as account for the possible range of stresses that will be acting on pillars. The …
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Zur Strömungssimulation in Einzelklüften: Gegenüberstellung von numerischen Methoden und Experiment
… in the field of flow and transport processes in fractured rock is of high relevance due to the frequent occurrence of fractures in geological formations. For this reason, fracture flow problems are addressed in many fields of engineering tasks. Based on results of numerical simulations and …
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Optimizing Pillar Design for Improved Stability and Enhanced Production in Underground Stone Mines
… carbonate or stone deposits, where extensive fracture networks and groundwater flow become leading factors for generating unsteady ground conditions including karsts. A sudden encounter with karst cavities during mine advance may lead to safety issues, including ground collapse and outflow of …
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An unstructured finite volume simulator for multiphase flow through fractured-porous media
Modeling of multiphase flow in fractured media plays an integral role in management and performance prediction of oil and gas reserves. Geological characterization and nmultiphase flow simulations in fractured media are challenging for several reasons, such as uncertainty in fracture location, …
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Data-Driven Deep Learning Methods for Physically-Based Simulations
… flow analysis problems modeled through Discrete Fracture Networks, training Deep Learning models as reduced models for Uncertainty Quantification. In particular, we look for trained Neural Networks able to predict the outflowing fluxes of a Discrete Fracture Network model. These Neural Networks …
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Effects of Hurricane Fault Architecture on Groundwater Flow in the Timpoweap Canyon of Southwestern, Utah
… zone, by contrast, consists of small faults and fracture networks, which can act as conduits. Timpoweap Canyon near Hurricane, Utah has superb exposures of the fault core and damage zone of the Hurricane Fault. Also within the canyon, springs discharge from the damage zone into the Virgin River, …
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Correlstion between the volume of slurry and the volume of fracture in Barnett Shale
Microseismic fracture mapping has revealed that large fracture networks can be generated in many shale reservoirs and create multiple of plan complex structure. The ultra-low permeability in Barnett shale requires hydraulic fracturing to generate wellbore contact with the reservoir in order to …
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Production Analysis in Tight/Shale Reservoirs Via Machine Learning Approaches
… characterized by low permeability and complex fracture networks, positioning tight/shale gas as a pivotal component of the global energy mix. The accurate prediction of well production dynamics in these complex formations is a formidable challenge. Traditional empirical and numerical …
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Building, Updating and Verifying Fracture Models in Real Time for Hard Rock Tunneling
Fractures and fracture networks govern the mechanical and fluid flow behavior of rock masses. Tunneling and other rock mechanics applications therefore require the characterization of rock fractures based on geological data. Field investigations produce only a limited amount of data from boreholes, …
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