Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 41 for “"Fracture propagation"”.
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Experimental analysis of permeability barriers to hydraulic fracture propagation
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1994.
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Automatic two-dimensional multi-fracture propagation modelling of brittle solids with particular application to rock
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1986.
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Numerical simulation of fluid flow, proppant transport and fracture propagation in hydraulic fractures for unconventional reservoirs.
… distribution of proppant injected in hydraulic fractures significantly affects fracture-conductivity and well-performance. The proppant transport and suspension in thin fracturing fluid used in unconventional reservoirs are considerably different from those of fracturing fluids in conventional …
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A generalized finite element method for the simulation of non-planar three-dimensional hydraulic fracture propagation
Hydraulic fractures are a class of tensile fractures that occur in brittle and quasi-brittle materials due to the injection of a viscous fluid. Hydraulic fractures occur both naturally and created deliberately for engineering applications. In the oil and gas industry, it is a preferred method to …
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Solving three-dimensional problems in natural and hydraulic fracture development : insight from displacement discontinuity modeling
Although many fracture models are based on two-dimensional plane strain approximations, accurately predicting fracture propagation geometry requires accounting for the three-dimensional aspects of fractures. In this study, we implemented 3-D displacement discontinuity (DD) boundary element modeling …
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Application of the Variational Fracture Model to Hydraulic Fracturing in Poroelastic Media
… the use of simple numerical models to describe fracture geometry and propagation. Field tests provide evidence of interaction and merging of multiple fractures, complex fracture geometry and propagation paths. These complicated behaviors suggest that the simple models are incapable of serving as …
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Fracture Growth Kinematics in Tight Sandstone Reservoirs
Opening-mode fractures—joints and veins—are widespread structures in sedimentary rocks even in slightly deformed and flat-lying sequences. Understanding the growth and connectivity of fractures in low permeability sandstone reservoirs is essential for optimal hydrocarbon exploitation. In a linear …
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Fully Coupled Finite Element Model to Study Multiple Hydraulic Fracturing in Heterogeneous Tight Formations
… pressure into the wellbore to propagate initial fractures generated during well perforation. It is a coupled process of fluid and rock mechanics one controlling the fluid movement and other fracture propagation. There is a lack of reliable and robust simulation technique that can couple these two …
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Mechanisms of Interaction Between Hydraulic and Natural Fractures in Shale Rocks
… the interaction between hydraulically induced fractures and pre-existing natural fractures in geologic formations is key for optimizing subsurface energy systems that rely on fluid injection into fractured rocks. These include Enhanced Geothermal Systems (EGS), CO₂ sequestration, hydrogen …
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Facies architecture and mechanical stratigraphy of Mississippian grainy and muddy carbonate sediment gravity-flow deposits: Rancheria Formation, Sacramento Mountains, New Mexico
… of depositional processes, facies architecture, fracture distribution, and the resultant mechanical stratigraphy. Outcrops of the Rancheria Formation in the Sacramento Mountains, New Mexico represent a Mississippian carbonate slope system that is spectacularly exposed for sedimentologic and …
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Coupled 3-d numerical simulation of proppant transport and fluid flow in hydraulic fracturing
… It involves rock mechanics for the part of fracture propagation and involves fluid mechanics for the part of slurry injection, fluid flow, fluid leak-off, proppant transport, proppant settling and interaction between fluid and proppant particles. In this study, the focus is on fluid and …
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Hydraulic Fracturing and Flow-back Simulation in Unconventional Tight Reservoirs
… (WCSB). It is important to understand hydraulic fracture propagation mechanism, effects of their properties and controlling factors affecting flow-back recovery. In this thesis, based on tight reservoir models in WCSB, firstly we examine different fracture geometry distributions and further …
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A comparative study of shared memory parallelism on regular and irregular data structures using OpenMP and Galois
… which refines a triangulated mesh; and Dynamic Fracture Propagation, which operates on a triangulated mesh with adaptive refinement; is evaluated. It is found that OpenMP is a simple yet powerful tool for parallelization of most regular applications and workloads. Galois, which is specially …
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Acoustic monitoring of hydraulic stimulation in granites
… levels of heat and recoverable energy. Hydraulic fracture stimulation of low permeability EGS reservoir rock is widely employed to develop this resource and is generally required to make unconventional resources an economically viable resource. Significant challenges for EGS technology include …
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Impact of Hydraulic Fracture Conductivity Modeling on Well Performance and Development in Unconventional Reservoirs
… represent subsurface behavior. Because hydraulic fractures provide the primary pathways for fluid flow in unconventional reservoirs, accurately modeling fracture geometry and conductivity is essential for generating reliable reserves, production forecasts, and field development plans. Fracture …
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A Low Cycle Fatigue Testing Framework for Evaluating the Effect of Artifacts on the Seismic Behavior of Moment Frames
… that include artifacts are used to calibrate fracture parameters for different low cycle fatigue models such as the Cyclic Void Growth Model (CVGM), Stress-Weighted Damage Model (SWDM) and Cyclic Damage Plasticity Model (CDPM) which are then used in conjunction with finite element (FE) models …
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Comparison Study of Liquid CO2 and Water as a Fracturing Fluid for Improved Gas Production in Tight Reservoirs
… however it is crucial to understand how fracture growth and production comparison when different fluid systems like water and CO2 based systems are being used. In this thesis, based on tight reservoir model in WCSB, firstly we have reviewed how conventional water based hydraulic …
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New technologies for unconventional reservoir characterization: Seismic inversion, focal-time estimation, and signal processing to improve reservoir imaging
… as induced seismicity. Frequently, hydraulic fracture stimulation programs do not go as planned; fractures occur out of zone, depart from the predicted models, and, in some cases, induce felt seismic events (induced by hydraulic fracturing operations). From the Fox Creek, Alberta study area …
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Bio-inspired composites : a de novo approach to the conceptualization, design and synthesis of tough mesoscale structures with simple building blocks
… a system, thus fundamentally changing their fracture mechanical behavior. Indeed, architectures are created from brittle building blocks that exhibit stable fracture propagation under sustained load transfer and increasing deformation. Furthermore, a detailed study of the basic interactions …
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