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.
Results
Showing 1 to 12 of 12 for “"Gas Shale"”.
-
Gas Shale Permeability and Velocity Measurement at Laboratory Scale
Matrix permeability of gas shales is a crucial parameter for their characterization, production potential, and commercial development. Gas shales are an important reservoir type from an economic perspective because of their potential to hold large volume reserves and produce economically over time. …
-
Methane Storage and Adsorption Characteristics in Nanoporous Gas Shale
Natural shale is mainly characterized by various mineral compositions and multi-scale pore sizes, leading to complex adsorbate-adsorbent interactions, also named the energetic heterogeneity of shale rocks. In this study, a multi-site Langmuir model was proposed to address the energetic …
-
Assessment of fracture properties and rate effects on fracture of materials by micro scratching: application to gas shale
… scratch tests. Finally this method is applied to gas shale materials, which exhibit a higher degree of complexity, including heterogeneity, anisotropy and rate-dependence. In particular, a strong directionality of the fracture behavior is observed at the microscopic scale, which is also confirmed …
-
Creep properties of source rocks using indentation : the role of organic matter on texture and creep rates
Gas shale formations are source rocks of variable mineralogy with oil and natural gas production potential. Due to their low permeability, these source rocks can be produced only after fracturing. Therefore, understanding and characterizing the time-dependent mechanical properties of these …
-
Fracture mechanics in the semigrand canonical ensemble
… non-harmonic bond potentials, analogous to the gas-liquid phase diagram, with the equivalent of a liquidus line ending in a critical point. The phase diagram delineates a solid phase, a fractured phase and a gas phase, and provides clear evidence of a first-order phase transition intrinsic to …
-
Linear elastic fracture mechanics in anisotropic solids : application to fluid-driven crack propagation
… engineers try to increase the permeability of gas shale rocks by fracturing it. In this context, we introduce some elements of linear elastic fracture mechanics in anisotropic solids. Notably, a special attention is paid to transverse isotropy, often used to model rocks but also some …
-
Geochemical Characterization of the Utica Shale Play using XRF-Based Chemostratigraphy in Ohio
<p>The Utica shale is an extensive gas shale play within the Appalachian Basin, expanding from Quebec through New York, into Pennsylvania, West Virginia and Ohio. Currently a target for gas exploration, it is also the source rock for much of the Paleozoic reservoirs throughout the basin. However, …
-
Investigation of Nanopore Confinement Effects on Convective and Diffusive Multicomponent Multiphase Fluid Transport in Shale using In-House Simulation Models
… permeability are among the characteristics of shale rocks. In tight shale reservoirs, the nano-confinement effects that include large gas-oil capillary pressure and critical property shifts could alter the phase behaviors, thereby affecting the oil or gas production. In this research, two …
-
Spatial and temporal variations in the geometry and composition of the Permian Whitehill Formation South Africa
… predominantly of black laminated carbonaceous shales, earlier studies detected significant spatiotemporal variability in its stratigraphy and composition, particularly the distribution of its organic carbon content across the basin. Because these stratigraphic variations and compositional …
-
Geo-chemo-mechanical modeling of sedimentary rocks: application to unconventional reservoirs and geological CO2 sequestration
… in global geopolitics. The recovery of oil and gas from organic-rich shales, geological sequestration of CO2 in sandstone host rocks and storage of nuclear waste in impermeable rocks are among the most challenging problems worldwide. Technical challenges and environmental concerns slow the …
-
USE OF MICROALGAE FOR WASTEWATER TREATMENT AND BIOFUEL PRODUCTION: EFFECTS OF ENVIRONMENTAL CONTAMINANTS ON THE CELLULAR RESPONSE
… pattern that was expected to be seen in natural gas shale reservoirs. Chapter 4 covers the characterization of the effects of contaminants (toxic metals) in hydraulic fracturing flowback water on the biomass growth and cellular lipid accumulation in Dunaliella salina. Metals were analyzed using …