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 20 of 27 for “"Mudrocks"”.
-
Permeability anisotropy of resedimented mudrocks
… the permeability anisotropy of several mudrocks, which are clay-rich sedimentary formations, using re-sedimentation, a process of homogenization of naturally-occurring soils and recreation of the sedimentation environment in a controlled laboratory setting. The permeability anisotropy of …
-
Compression behavior of smectitic vs. illitic mudrocks
… testing was performed on smectitic and illitic mudrocks. The original Gulf of Mexico - Eugene Island (GoM-EI) mudrock sets the baseline for smectitic mudrock in order to compare with illitic mudrocks. Two methods were used to create illitic mudrock from the GoM-EI sediment.
-
Quantitative geometric model of connected carbonaceous material in mudrocks
… the pore level geometries of grains and voids in mudrocks in order to understand the flow potential of gas from these rocks. Recent observations of nanopores within carbonaceous material in mudrocks have led to the hypothesis that such material provides conduits for gas migration within the …
-
Permeability anisotropy and resistivity anisotropy of mechanically compressed mudrocks
… anisotropy in mechanically compressed mudrocks. A novel measurement method is developed using resedimented cubic specimens. The permeability anisotropy of Resedimented Boston Blue Clay (RBBC) is systematically measured to determine both the magnitude and evolution of the permeability …
-
UTILIZATION OF CHEMOSTRATIGRAPHIC PROXIES FOR GENERATING AND REFINING SEQUENCE STRATIGRAPHIC FRAMEWORKS IN MUDROCKS AND SHALES
Recent advances in handheld XRF (HHXRF) technology provide an opportunity to demonstrate the utility of chemostratigraphy within mudrock successions. Three cores from Lincoln, Pottawatomie, and Pontotoc Counties in Oklahoma and two outcrops at the Hunton Anticline Quarry (HAQ) in Murray County, OK …
-
From clay slurries to mudrocks : a cryo-SEM investigation of the development of the porosity and microstructure
… the microstructure of smectitic and illitic rich mudrocks that are resedimented in the laboratory from the Gulf of Mexico and Boston Blue clay natural sediments. The resedimentation technique consists of mixing clay sediments with saline water to form a slurry, which is then subjected to a wide …
-
A Petrologic and Diagenetic Study of the Onondaga Formation, New Jersey
… with nodular chert, and three siliceous mudrocks including calcareous mudrocks, calcareous mudrocks with nodular chert, and cherty calcareous mudrocks. The mineralogy of these five lithofacies is roughly consistent amongst the sites. Carbonate minerals (calcite and dolomite), silica, …
-
Post-depositional structural changes in clay sediments
… the changes in the microstructure of clays and mudrocks due to the influence of the environment of deposition and subsequent compaction. A sedimentary model is proposed in which the development of fissility in shales and the formation of hydrocarbon source rocks are attributed to the chemical …
-
The engineering geology and stability of the rapidly alternating limestone and mudrock sea cliffs of glamorgan
… forms were identified in the more calcareous mudrocks, and a laboratory leaching experiment demonstrated that weatherability was greatest in such mudrocks. Pyrite oxidation was shown not only to enhance carbonate leaching, but to degrade the clay minerals and induce rehydration of the double …
-
Fluvial facies, vertebrate taphonomy and palaeosols of the Teekloof formation (Permian) near Beaufort West, Cape Province, South Africa
… mainly of vertically accreted floodplain mudrocks with interbedded continuous sheets of fine-grained sandstone that bear evidence of having accumulated by lateral accretion on the inner banks of meandering channels. The mudrocks contain numerous fossilized skeletons of therapsid …
-
Depositional environments of a portion of the Bullion Creek Formation (Paleocene), Western Billings County, North Dakota
… Creek Formation consists predominantly of mudrocks , with fine-grained sandstone, lignite, and rare limestone lenses . Previous workers have postulated combinations of fluvial and lacustrine depositional environments for the rocks. </p><p> The study area covers 15 square kilometres in the …
-
Capillary pressure curve and liquid permeability estimation in tight oil reservoirs using pressure decline versus time data
… shale is a difficult process because organic mudrocks have very low permeability (10nD - 100nD), high kerogen and clay content, a complex pore structure and low porosity (typically less than 10%). In addition, most of the pore sizes in organic mudrocks are within the nanometer range, thus …
-
Fluvial facies architecture and provenance history of the Abrahamskraal-Teekloof formation transition (lower Beaufort group) in the main Karoo Basin
… Formations. These units are mainly made up of mudrocks with subordinate fine-grained sandstone-rich intervals. The objective of this mainly qualitative facies analysis study is the evaluation of the vertical and lateral abundances of the facies associations in order to decouple the preserved …
-
Stress- and direction-dependent analysis of elastic and petrophysical properties, and texture in unconventional rocks
… elastic properties, especially in organic-rich mudrocks, cannot be neglected. Using isotropic model for anisotropic rocks may affect the accuracy of the mechanical earth model and horizontal stress calculations. Obtaining anisotropic elastic properties from the lab are, however, time- and …
-
Sedimentologic and lithostratigraphic properties and reservoir characterization of the Winnipeg Formation, Southern Saskatchewan
… wacke, feldspathic greywacke, and two types of mudrocks. Among the different well cores studied, the combined quartz arenite lithofacies constitute about 47% of the member, whereas the wacke and the mudrock lithofacies constitute 44% and 9%, respectively. Isopach maps of the various lithofacies …
-
OVERPRESSURE AND COMPACTION IN THE LOWER KUTAI BASIN, INDONESIA
… compaction hypothesis; instead, the mudrocks are inferred to be overcompacted. The top of the transition zone into hard overpressure coincides with the onset of gas generation indicating that the gas generation is the principal cause of unloading. Chemical compaction processes must …
-
Paleoenvironmental Reconstruction of an Upper Ordovician Rocky Shoreline: The Lindsay Formation of Heywood and Partridge Islands, Ontario
… element geochemistry of the Lindsay Formation mudrocks suggests that the detritus was derived from a mixed mafic-felsic source. The felsic component was eroded from quartz-rich Paleoproterozoic basement, whereas the mafic material may have been eroded from a distal Taconic arc or more proximal …
-
The Semliki Basin, Uganda : its sedimentation history and stratigraphy in relation to petroleum accumulation
… scans of bulk samples reveal that the mudrocks/claystones are dominated by clay minerals with subordinate quartz, feldspars and calcite. The clay minerals include illite, illite-smectite, kaolinite, montmorillonite, illite-monnnorillonite, and mica with mixed layer illite-smectite and …
-
Stratigraphic Distribution, Taphonomy, and Isotope Paleoecology of the Dinosaurian Fauna in the latest Campanian lower Horseshoe Canyon Formation, Alberta, Canada
… time resulted in a reduction in organic-rich mudrocks and coal, an increase in soil development, and changes in the dominant configuration for fossil preservation from sparse bonebeds to microsites. Climate change was also investigated through stable oxygen isotopes in tyrannosaur tooth enamel …
-
Early evolution of environments and metabolism: insights from nitrogen, selenium and sulfur isotopes
… concentrations and isotopic ratios in marine mudrocks support an early Archean origin of microbial sulfate reduction and late Archean enhancement of biological pyrite oxidation on land, leading to increasing fluxes of sulfate and other nutrients to the ocean. In the third part (Chapters 4-7), …
Page 1 of 2