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 21 for “"Natural Fracture"”.
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THREE-DIMENSIONAL MODELING OF HYDRAULIC AND NATURAL FRACTURE INTERACTIONS AND ITS APPLICATIONS IN RESERVOIR STIMULATION
… for economic production by hydraulic fracturing. Natural fractures and other discontinuities are inseparable elements of unconventional reservoir rock masses. During stimulation, hydraulic fractures often interact with the natural fractures to form a fracture network which communicates with the …
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Model for a Shale Gas Formation with Salt-Sealed Natural Fractures
There are reported cases of hydraulically fractured shale wells that exhibit boundary dominated flow in a very short period. This study suggests that dissolution of salt-sealed natural fractures in the shale offers a novel explanation for the early boundary dominated flow. We first discuss a …
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Spatio-temporal microseismic analysis of the Woodford Shale, Canadian County, Oklahoma
… data that can be used to monitor hydraulic fracture stimulation programs as well as to characterize the resulting hydraulic fractures. This is especially important in low permeability gas and oil shales, where the creation of additional permeability through these fracture treatments is …
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The Application of Single porosity Model to Predict the Performance of the Low Permeability Naturally Fractured Formations
Natural gas extraction from shale is currently an expensive endeavor due to the tight reservoir rock with nano-darcy permeability. New technology in the form of horizontal drilling and hydraulic fracturing (fracturing through the use of high pressure liquids) has overcome the flow capacity problem …
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The growth of fractures in the Earth
Fracture growth under compressive loading is studied using the maximum strain energy release rate criterion by means of both the finite element and the boundary element methods. Although this approach is computationally intensive, it is indispensable for this type of problem because other criteria …
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A novel diagnostic fracture injection test workflow considering natural fractures
Applications of diagnostic fracture injection test (DFIT) are used in unconventional reservoirs to determine reservoir characteristics for future fracture design and production. DFIT consists of creating a minifrac by pumping small amounts of water and monitoring the pressure response. The presence …
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Controlling Factors on Condensate Production from the Eagle Ford Shale
… compared with the dual porosity model. A higher natural fracture permeability results in an increased production and recovery. The preliminary conclusion is reached that lean injection is not feasible when shale permeability is within the range considered in this study (0.0001 md). However, there …
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Non-destructive evaluation of laboratory scale hydraulic fracturing using acoustic emission
… to develop techniques to characterize hydraulic fractures and fracturing processes using acoustic emission monitoring based on laboratory scale hydraulic fracturing experiments. Individual microcrack AE source characterization is performed to understand the failure mechanisms associated with …
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Interplay of porous media and fracture stimulation in sedimentary enhanced geothermal systems : Red River Formation, Williston Basin, North Dakota
Fracture stimulated enhanced geothermal systems (EGS) can be installed in both crystalline rocks and sedimentary basins. The Red River Formation (Ordovician), which lies between 3.6 and 4.2 km depth in the Williston Basin, is a viable site for installation of sedimentary EGS (SEGS). SEGS is …
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Use of 3D Seismic Azimuthal Iso-Frequency Volumes for the Detection and Characterization of High Porosity/Permeability Zones in Carbonate Reservoirs
… aligned porosity/permeability, such as open, natural fracture trends, have been shown to result in reservoirs being anisotropic in many properties.;The ability to identify zones within a subsurface reservoir where porosity/permeability is significantly higher and to characterize them according …
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Evaluation of diagnostic fracture injection test (DFIT) and rate transient analysis (RTA) in Hereford field, northern DJ Basin
… structure of pore space, pore connectivity, and natural fracture density in such reservoirs. Because of the flow dominance of fractures—natural and from well stimulation, these reservoirs are categorized as dual-porosity reservoirs. The two interacting pore channels are called matrix and …
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Evaluation of diagnostic fracture injection test (DFIT) and rate transient analysis (RTA) in Hereford field, northern DJ Basin
… structure of pore space, pore connectivity, and natural fracture density in such reservoirs. Because of the flow dominance of fractures—natural and from well stimulation, these reservoirs are categorized as dual-porosity reservoirs. The two interacting pore channels are called matrix and …
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Hydraulic-fracturing induced seismicity in Alberta, Canada: Analysis and interpretation using dense local arrays
… to the 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 …
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Uncertainty quantification of unconventional reservoirs using assisted history matching methods
… candidate. Here we integrate embedded discrete fracture model (EDFM), one of fractured-reservoirs modeling techniques, with a commercial AHM and optimization tool. We develop a new parameterization scheme that allows for altering individual properties of multiple wells or fracture groups. The …
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Elasto-static and -dynamic Analysis of Subsurface Fracture Phenomena
In this thesis, we investigate fracture phenomena as it pertains to unconventional resource exploration and development, specifically in tight oil and gas. We present methods for the inference of natural fracture systems and evaluate the hydraulic fracture response, especially in the vicinity of …
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An integrated peridynamics-finite volume based multi-phase flow, geomechanics and hydraulic fracture model
… phenomena including the interaction of hydraulic fractures with multi-scale heterogeneities such as natural fractures, stress/barrier layers, bedding planes, shale laminations, and mineralogy. Moreover, hydraulic fractures originating from different clusters or stages in a multi-stage, …
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Geomechanical aspects of fracture growth in a poroelastic, chemically reactive environment
Natural hydraulic fractures (NHFs) are fractures whose growths are driven by fluid loading. The fluid flow properties of the host rock have a primary, but hitherto little appreciated control on the NHF propagation rates. This study focuses on investigating the impacts of host rock fluid flow on the …
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Geomechanics and elastic anisotropy of the Bakken Formation, Williston Basin
… the spatial alignment of mineral grains, layers, fractures and stresses which causes elastic wave velocity and other elastic properties to vary with direction. There are two types of anisotropy: intrinsic and stress-induced. Intrinsic anisotropy is caused by beddings, microstructures or aligned …
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Numerical Simulation of pressure Transient Analysis in Tight Formation and Field Data Categorization and Typical Well Production Data Analysis
… oil and gas commercially from tight formations, naturally completed (open-holed) or cased horizontal wells with multi-stage hydraulic fractures are the most popular implementation for completion. The use of a combination of the multi-fractured horizontal wells is expected to create a complex …
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Three-dimensional multi-scale hydraulic fracturing simulation in heterogeneous material using Dual Lattice Model
… a multi-physics multi-scale problem related to natural processes such as the formation of dikes. It also has wide engineering applications such as extraction of unconventional resources, enhanced geothermal energy and carbon capture and storage. Current simulators are highly simplified because …
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