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Showing 1 to 20 of 27 for “"Vitrinite Reflectance"”.
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Integrating vitrinite reflectance, rock-eval pyrolysis, flourescence microscopy and palynology of the Athabasca oil sands, Kearl Lake area, northeastern Alberta
… Group. The approach involves the integration of vitrinite reflectance (VR), Rock-Eval pyrolysis, fluorescence microscopy, and palynology. Mean VR varies between 0.21 and 0.43% Ro and indicates thermally immature levels equivalent to the rank of lignite to sub-bituminous coal. Although differing …
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A study of the effects of organic matter on illitization in the Woodford Shale, Oklahoma and Kansas
… a wide range of thermal maturity (based upon vitrinite reflectance), yet most clay mineral studies report primarily illite (Caldwell, 2011 & Whittington, 2009). A previous report contrasts this behavior to other late Paleozoic shales in Oklahoma (Kowal, 2016). The major difference between …
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OVERPRESSURE AND COMPACTION IN THE LOWER KUTAI BASIN, INDONESIA
… logs and other data such as temperature and vitrinite reflectance data have been re-examined to analyse the overpressuring in this area. Unloading mechanisms have been considered as alternatives to disequilibrium compaction. The reasons for doing so are the high temperatures in this basin, …
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Thermal and Diagenetic Evolution of Carboniferous Sandstones, Central Appalachian Basin
… various techniques. Paleothermometers including vitrinite reflectance and fluid inclusions indicate that burial of Lower and Upper Pennsylvanian strata of the Appalachian Plateau in West Virginia exceeded 4.4 km during the late Permian and occurred at a rate of ~100 m/m.y. Exhumation rates of …
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Application of Raman Spectroscopy and Transmission Spectroscopy for Shale Reservoir Characterization: Thermal Maturity Correlation and Organic Matter Type Differentiation
… standard measures of thermal maturity include vitrinite reflectance and various other visual (e.g., TAI, solid bitumen reflectance, etc.) and geochemical measurements (e.g., Rock-Eval T-Max) all reported as %Ro or an equivalent %Ro. Recently, with advances in hydraulic fracturing and horizontal …
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Paleogeothermal Conditions in the Illinois Basin During Late Paleozoic Coalification
… to an intrusion, additionally the analysis of vitrinite reflectance in deep wells suggests that the paleogeotherm of the basin contain an inflection at the Mississippian-Pennsylvanian boundary. These observations suggest that topographically driven regional flow of hydrothermal fluids through …
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Geochemical controls on production in the Barnett Shale, Fort Worth Basin.
… the organic matter and general thermal maturity, vitrinite reflectance, δ¹³C of produced methane and methane abundance to evaluate thermal maturity in more detail, and x-ray diffraction (XRD) to determine mineralogy. Based on these analyses, it is apparent that the best production from the Barnett …
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Igneous intrusions and thermal evolution in the Raton Basin, CO-NM: contact metamorphism and coal-bed methane generation
… at four different outcrops were analyzed by vitrinite reflectance, carbon isotopes and petrography. Reflectance values at sill contacts are elevated over a wider zone than for dikes. Coal [delta]¹³C values increase by 1% approaching the contacts of dikes and decrease by approximately 1.5% at …
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Geology and characterization of coal at the Mushithe Coal Occurrence, Soutpansberg Coalfield, Limpopo Province, South Africa
… for maceral identification, mineral analyses and vitrinite reflectance using petrographic study. Detailed geological mapping of the area around the Mushithe coal occurrence showed the geological setting of coal in this area. The following lithologies were identified in the study area: sandstone, …
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GEOCHEMISTRY OF THERMALLY ALTERED COALS AND ORGANIC-RICH SHALES: THE IMPACT OF RAPID HEATING ON PHYSICAL AND CHEMICAL PROPERTIES OF ORGANIC MATTER
… and organic-rich clays or shales) including vitrinite reflectance, maceral petrographic composition, mineralogy, stable isotope composition, trace element composition, and bulk geochemistry. Igneous intrusions into coals and organic-rich rocks may have contributed to global warming in the …
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A PETROLEUM SYSTEM STUDY OF THE CRATONIC WILLISTON BASIN IN NORTH DAKOTA, U.S.A.: THE ROLE OF THE LARAMIDE OROGENY
… oil-and-gas prone source. Geochemical data (vitrinite reflectance %Ro, in this case) were used for model calibration. Results show a heat flow range between 41.91-65.14 mW/m2, with higher values toward the center of the basin in North Dakota where the sediment package thickens, and lower …
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Coalbed gas origin and distribution in the southeastern Illinois Basin
… high volatile bituminous C Indiana coals with a vitrinite reflectance Ro ~ 0.6% contain significant amounts of coal gas (~3 cm3/g, 96 scf/t) with ≥ 97 vol.% of microbial methane. In contrast, deeper (>300 m) and more mature (high volatile bituminous A) coals in a tectonically active zone in the …
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The Post Triassic uplift and erosion history of the Southwestern UK
… (apatite fission-track analysis and vitrinite reflectance data) seismic and compaction data, this study has revealed an exhumation history of far greater complexity than previously suspected across the Southwest UK, with regional kilometer-scale exhumation episodes beginning during …
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Sedimentary basin evolution and structural compartmentalization in the northernmost Andes : Eastern Cordillera and Magdalena Valley, Colombia
… (CC) magmatic arc during initial Andean uplift. Vitrinite reflectance (VR) results indicate variations in topography and sediment burial across fault-bounded Cretaceous-Paleocene units after fault-related folding, as well as before and during unconformity development. The maximum depositional age …
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Lithostratigraphic and Geochemical Characterisation of the Waterberg Coalfield: Implications to Acid Mine Drainage, Limpopo Province, South Africa
… coal was classified as below grade D. From the vitrinite reflectance value (ranging between 0.6 to 0.7), coal was ranked as medium-grade bituminous C. Paste pH and EC results indicated that the Sekoko coal is already undergoing oxidation, and modified Sobek tests indicated that over 72% of the …
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Rock Physics Study of Lacustrine Shales and Applications in Geophysical Prediction of Sweet Spot
… X-ray diffraction (XRD), Rock-Eval pyrolysis, vitrinite reflectance analysis, scanning electron microscopy (SEM), and nuclear magnetic resonance (NMR) on the collected shale samples. Secondly, I conducted systematic laboratory measurements for acoustic properties, including seismic (2-200 Hz) …
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SOURCE AND MATURATION OF HYDROCARBONS IN THE FRIO FORMATION OF THE HUMBLE FIELD, SOUTHEAST-TEXAS GULF COAST BASIN
… entered the main oils generation window with vitrinite reflectance ranging from 0.68% to 1.3% and expulsion temperatures of 126°C to 137°C. Combining the maturity biomarker properties with thermal maturity modeling, the Lower Wilcox could be a possible source of the Frio reservoired oils with …
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The chemical characterisation of authigenic carbonates from the Witbank no. 2 coal seam : environmental and diagenetic implications
… diffraction, total organic carbon analysis, vitrinite reflectance, reflected and transmitted light microscopy, scanning electron microscopy and electron microprobe analysis. Comparison with the studies of Matsumoto and Iijima (1981), Curtis and Coleman (1986) and other literature showed the …
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HYDROCARBON ACCUMULATION OF SHAHEJIE FORMATION, BOHAI BAY BASIN, CHINA
… with measured borehole temperature and vitrinite-reflectance data. Results indicate that the present-day heat flow is ca. 50 mW/m2. Paleo heat flow increased from 43 to 36 Ma, with a peak of 83.68 mW/m2 at approximately 36 Ma and then decreased till present. The source rocks are …
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Controlling factors of two Middle Triassic carbonate platforms: Latemar and Rosengarten (Dolomites, Northern Italy)
… of the Rosengarten and Latemar platforms. Vitrinite reflectance and apatite fission track data both argue for a shallow maximum burial. Present day topography was overlain by a maximum thickness of 1100m of overburden. There are no indications for a Neogene flysch or molasse-type setting as …
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