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Zircon Geochronology Of Ash Beds In The Marcellus Shale Of The Appalachian Basin, Jessica M. Hayward
Zircon Geochronology Of Ash Beds In The Marcellus Shale Of The Appalachian Basin, Jessica M. Hayward
Graduate Theses, Dissertations, and Problem Reports
Volcanic ash horizons, produced by arc magmatism in the Acadian orogeny, are interbedded with the Marcellus Shale and Onondaga Limestone of the Appalachian basin. Zircon grains from the ash layers are suitable for SIMS U-Th-Pb geochronology due to their resistant behavior against weathering and ability to record age of the eruptions.;A total of 24 Tioga ash layers within cores of the Middle Devonian Marcellus and Onondaga from six wells located in West Virginia and Pennsylvania were collected for U-Pb dating. The ash horizons were recognized as thinly laminated tuffaceous shale with graded beds of white mica and pyrite, ranging in …
Petrofacies And Depositional Systems Of The Bakken Formation In The Williston Basin, North Dakota, Anne Steptoe
Petrofacies And Depositional Systems Of The Bakken Formation In The Williston Basin, North Dakota, Anne Steptoe
Graduate Theses, Dissertations, and Problem Reports
Late Devonian and Early Mississippian Bakken Formation in the Williston basin of North Dakota is a large emerging unconventional oil play that taps into reserves previously thought to be uneconomical to produce. The hydrocarbon source rocks and unconventional oil reservoir are widespread across the intracratonic basin with an estimated 3.7 billion barrels of undiscovered, recoverable oil, and has significant economic potential in portions of North Dakota, South Dakota, Montana, Saskatchewan, and Manitoba. Although the Bakken interval is the target of numerous horizontal wells throughout the basin, several uncertainties remain including the environment and distribution of depositional facies, especially in the …
Reservoir Heterogeneity In A Carbon Sequestration Target: The Donovan Sand Member Of The Rodessa Formation, Citronelle Field, Alabama, Keith Coffindaffer
Reservoir Heterogeneity In A Carbon Sequestration Target: The Donovan Sand Member Of The Rodessa Formation, Citronelle Field, Alabama, Keith Coffindaffer
Graduate Theses, Dissertations, and Problem Reports
The Citronelle field, located in Mobile County, Alabama, has been chosen as a U.S. Department of Energy (DOE) Carbon Capture and Storage (CCS) pilot site, and supercritical CO2 has been injected for the combined purposes of long-term storage testing and enhanced oil recovery (EOR). The target formation for injection is the Early Cretaceous Donovan Sand of the Rodessa Formation, and is characterized by discontinuous fine- to medium-grained, heterogeneous arkosic fluvial sandstones interbedded with fissile mudstones and micaceous silts. Based upon core analysis of the Donovan Sand, depofacies indicate a fluvio-deltaic/estuarine depositional environment for the Donovan Sand. Probable sources of the …
Use Of 3d Seismic Azimuthal Iso-Frequency Volumes For The Detection And Characterization Of High Porosity/Permeability Zones In Carbonate Reservoirs, Brian E. Toelle
Use Of 3d Seismic Azimuthal Iso-Frequency Volumes For The Detection And Characterization Of High Porosity/Permeability Zones In Carbonate Reservoirs, Brian E. Toelle
Graduate Theses, Dissertations, and Problem Reports
Among the most important properties controlling the production from conventional oil and gas reservoirs is the distribution of porosity and permeability within the producing geologic formation. The geometry of the pore space within these reservoirs, and the permeability associated with this pore space geometry, impacts not only where production can occur and at what flow rates but can also have significant influence on many other rock properties. Zones of high matrix porosity can result in an isotropic response for certain reservoir properties whereas aligned porosity/permeability, such as open, natural fracture trends, have been shown to result in reservoirs being anisotropic …
Effect Of Sediment Composition On The Uniformity Of Experimentally-Formed Methane Hydrate, Terrence R. Ryan
Effect Of Sediment Composition On The Uniformity Of Experimentally-Formed Methane Hydrate, Terrence R. Ryan
Graduate Theses, Dissertations, and Problem Reports
Experimentalists that try to duplicate the methane hydrate found in natural systems have regularly made non-uniform hydrate in packed sediments. Some element of the natural system is missing from the experimental procedure. The goal of this research was to discover what role sediment composition and grain size play in the uniformity of experimentally-formed methane hydrate. The discoveries were quite surprising.;The motivation for this research lies in the analysis of sediment samples and well-log data from the 2010 Mount Elbert, AK Stratigraphic Test Well. Sedimentological analysis of core samples from this well indicated that a thin section within the methane hydrate …
Potential Inhibitors And Sources Of Error In The Measurement Of Travertine Precipitation Rates In A Karst Stream Influenced By Thermal Mineral Waters, Johnathan E. Moore
Potential Inhibitors And Sources Of Error In The Measurement Of Travertine Precipitation Rates In A Karst Stream Influenced By Thermal Mineral Waters, Johnathan E. Moore
Graduate Theses, Dissertations, and Problem Reports
Precipitation rates for travertine have been studied in many natural settings and compared to theoretical calcite (CaCO3) precipitation rates; in most studies, the emphasis is placed on the degassing of CO 2 as the primary controlling mechanism. Little research has been done in natural settings to evaluate precipitate composition, rates of precipitation, and the role of potential inhibitors of calcite growth. This study addresses these questions in a Sweet Springs Creek, West Virginia-Virginia: a karst stream fed partly by thermal mineral waters with high CO2. For this study, travertine plates were deployed to measure the accretion of precipitates in the …
Tracing Water And Carbon Sources In Complex Geochemical Settings Of The Appalachians: An Isotopic Perspective, Andrea L. Sack
Tracing Water And Carbon Sources In Complex Geochemical Settings Of The Appalachians: An Isotopic Perspective, Andrea L. Sack
Graduate Theses, Dissertations, and Problem Reports
Understanding sources of water and carbon are important for tracking recharge sources as well as assessing any changes in water quality associated with shale gas drilling and/or coal mining in the Appalachians. Natural stable isotopes have become an increasingly important tool for determining sources and cycling of water, carbon, nutrients and other trace elements. This is plausible because variations in water-rock interactions, recharge sources, recharge pathways, and residence time can impart unique isotopic fingerprints to different water sources.;The main objective of this study was to use stable isotopes of water (delta18OH2O and delta2H H2O), DIC (delta13CDIC) and SO4 (delta34SSO4 and …
Ambient Geochemical And Isotopic Variations In Groundwaters Across An Area Of Accelerating Shale Gas Development, Michon L. Mulder
Ambient Geochemical And Isotopic Variations In Groundwaters Across An Area Of Accelerating Shale Gas Development, Michon L. Mulder
Graduate Theses, Dissertations, and Problem Reports
One of the main challenges associated with Marcellus Formation shale gas development is to ensure proper management and disposal of flowback water produced as a result of hydraulic fracturing of gas wells. The flowback water consists of a mixture of returned frac'ing fluids and highly saline formation brines. As a result, improper management or disposal of this flowback can potentially contaminate the fresh surface waters and groundwaters of the area. To better assess any detrimental effect on water quality, there is need to understand the natural geochemical variations prior to the rapid expansion of gas drilling in the area.;This study …