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Showing 1 to 20 of 21 for “"Rock deformation"”.
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Rock deformation in the Rutland, Vermont area
Thesis. (Ph.D.) Massachusetts Institute of Technology. Dept. of Geology and Geophysics, 1953.
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Development of LiDAR assisted terrestrial radar interferometry for rock deformation monitoring
<p>"Rock and soil slope movements cost millions of dollars annually. During the past few decades, engineers have relied on traditional methods to detect slope movements. These tools are valuable for small spatial areas but, may not be adequate or cost effective for large spatial areas. Remote …
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Numerical modeling of mixed mode multiple crack propagation and its application to the simulation of nonlinear rock deformation and borehole breakout
Rock is a very heterogeneous material, containing structural weakness at all scales. These weaknesses include grain boundaries, pores, and cracks on the small scale, and joints, faults, and bedding planes on the large scale. Nonlinear rock deformation in the low-temperature, low-confinement regime …
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Simulation of stress dependent fluid flow in naturally fractured reservoirs
… Three numerical models (tensor, flow and deformation) are developed and coupled iteratively for this purpose. - A tensor model calculates grid based permeability tensor from discrete fracture network model, which includes individual fracture properties such as spatial distribution, length, …
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Strain Rate and Temperature Controls on Strain Heterogeneity: Its Significance for Deformational Concepts
Natural rock deformation is characteristically heterogeneous on all scales. Through experimental deformation of a typical oolitic limestone at upper crustal conditions, an attempt is made to evaluate the relative influence of temperature and strain rate upon the promotion of strain homogeneity. The …
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Application of the Variational Fracture Model to Hydraulic Fracturing in Poroelastic Media
… though a propagating hydraulic fracture induces deformation of the surrounding porous media. A rigorous hydraulic fracturing model capable of reproducing realistic fracture behaviors should couple rock deformation, fracture propagation and fluid flow in the both the fracture and reservoir. In …
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Flow Properties of Moine Thrust Zone Mylonites in Northern Assynt, NW Scotland
… for investigating the flow processes by which rock deformation occurred. These analytical techniques were applied to a suite of samples from the footwall and hangingwall of the Moine thrust exposed along the Allt Pol aâ Mhadaich stream located in the northern part of the Assynt window. …
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Multiscale Integration of Empirical Geologic Observations with Quantitative Structural Modeling to Constrain Late Cretaceous to Eocene Paleostress Environments on the Colorado Plateau
Relating crustal deformation to stress conditions has long been a subject of interest to the geologic community as rock failure has important implications for storage and extraction of petroleum and mineral deposits, as well as sequestration efforts. The ability to relate patterns of rock …
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Silicon and oxygen self-diffusion in forsterite and implications to upper-mantle rheology
… those estimated from dislocation creep rates by deformation experiments [Durham and Goetze, 1977a; Goetze and Kohlstedt, 1973]. In order to resolve this discrepancy, we measured DSi in a dry forsterite single crystal at 1600-1800 K, 1 atm -13 GPa using an ambient pressure furnace and Kawai-type …
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Improved reservoir characterization by incorporating geodetic data in a western Kazakhstan oilfield
… data to better inform model assumptions. Surface deformation measurement by InSAR is used to provide subsurface insights using as an example the "Polygon" field in Kazakhstan. This workflow leads to several key conclusions which could only be realized traditionally by drilling additional …
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The evolution of lithospheric deformation and crustal structure from continental margins to oceanic spreading centers
… investigates the evolution of lithospheric deformation and crustal structure from continental margins to mid-ocean ridges. The first part (Ch. 2) examines the style of segmentation along the U.S. East Coast Margin and investigates the relationship between incipient margin structure and …
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Geomechanical Reservoir Model Calibration and Uncertainty Assessment from Microseismic Data
Hydraulic stimulation of low permeability rocks in unconventional reservoirs has been observed to trigger microearthquakes (MEQs). Triggering of the MEQ events has been linked to the pore pressure, temperature, and in-situ stress variations which result in crack initiation. The resulting clouds of …
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Fracture-enhanced porosity and permeability trends in the Bakken Formation, Williston Basin, western North Dakota
… trends. In the absence of major tectonic deformation in the craton, a subtle pattern of fracturing has propagated upward through the sedimentary cover and emerged as linear topographic features visible on these large-scale, remote-sensed images. </p><p> The association of Landsat-derived …
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Structural analysis of the Paint Lake Deformation Zone, Northern Ontario /
The Paint Lake Deformation Zone (PLDZ), located within the Superior Province of Canada, demarcates a major structural and lithological break between the Onaman-Tashota Terrane to the north and the Beardmore-Geraldton Belt to the south. The PLDZ is an east-west trending lineament, approximately 50 …
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Shear Fracture Growth in Granular Rocks and Porosity-Permeability Relationships in Mudstones
… analyze the micromechanical response of granular rocks to unstable failure. Calibrated granular models of sandstone and granite are subjected to biaxial experiments under confining pressures of 0–50 MPa, leading to the development of shear fractures through interaction of emergent microcracks …
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The role of wind and water in shaping earth's plateaus
… different spatial and temporal scales: (1) bedrock wind-erosion rates are quantified in the arid Qaidam Basin of NW Tibet over millennial timescales using cosmogenic radionuclide dating; (2) present-day stable isotope composition in rainfall is examined across the south-central Andes in three …
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From some obscurity to clarity in Boom clay behavior: Analysis of its coupled hydro-mechanical response in the presence of strain localization
… of a damaged zone with significant irreversible deformation is generally unavoidable. A considerable change in the host rock properties could be likely resulted in this zone, which may potentially be important with respect to the long-term evolution and the performance of the system. In this …
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