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Showing 1 to 18 of 18 for “"Niobrara Formation"”.
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Benthonic foraminiferida of the Niobrara formation (Upper Cretaceous) at Pueblo, Colorado
Includes bibliographical references.
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Faults and fractures in the Niobrara Formation of Wattenberg field, Colorado
… log fractures are consistently found in both the Niobrara chalk and marl benches. The individual benches are not resolvable at the scale of the seismic data, but evidence that faults are present in both the chalks and marls lends credence to the potential that seismic data may be able to predict …
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Benthonic foraminiferida of the Niobrara formation (Upper Cretaceous) at Pueblo, Colorado
Includes bibliographical references.
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Biogenic gas occurrence in the Niobrara Formation, eastern Denver Basin, Colorado, USA
… field, which produces biogenic gas from the Niobrara Formation in the eastern part of the Denver Basin. The petroleum system of the biogenic play in the eastern part of the Denver Basin is a proven system. The maturity data are from high TOC marl intervals in the Niobrara Formation and …
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Biogenic gas occurrence in the Niobrara Formation, eastern Denver Basin, Colorado, USA
… field, which produces biogenic gas from the Niobrara Formation in the eastern part of the Denver Basin. The petroleum system of the biogenic play in the eastern part of the Denver Basin is a proven system. The maturity data are from high TOC marl intervals in the Niobrara Formation and …
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3-D seismic characterization of the Niobrara Formation, Silo field, Laramie County, Wyoming
… northeast of Cheyenne, Wyoming, is an important Niobrara oil field. The field produces from open, vertical, natural fractures that trend northwest-southeast across the field. Several proposed ideas for fracture genesis include: differential compaction or folding over basement highs, proximity to …
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Predictions of produced water quality and quantity for spatially-distributed wells in Niobrara formation
… heterogeneous shale oil and gas field. The information can also be used to model availability of water resources and plan long term recycling strategies for augmenting regional surface water supplies. This study describes protocols to estimate and predict produced water quantity and quality …
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Microbial analysis of the Niobrara formation for microbial enhanced oil recovery (MEOR) and contaminant tracing applications
Includes bibliographical references (pages 81-83).
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Mechanical stratigraphy and sonic log relationships using the Proceq Bambino in the Niobrara Formation, Denver Basin
… velocity. Preliminary data was taken from the Niobrara Formation in a Denver Basin core to demonstrate the repeatability, precision, and non-destructiveness of the Bambino. A relationship between HLD values and geomechanical properties such as unconfined compressive strength, Young's modulus, …
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Study of the organic content and mineralogy effects on the acoustic properties of the Niobrara Formation, Denver Basin
… of unconventional gas and oil production from Niobrara chalk and marl intervals across the Greater Wattenberg Area (GWA). The Niobrara carbonate system in the Denver Basin contains a TOC range of 1-8 wt.%. Additionally, GWA is associated with a geothermal anomaly. This study investigates the …
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Diagenesis of the B chalk, B marl, and Fort Hays member of the Niobrara Formation, Denver Basin, Colorado
… the B chalk, B marl and Fort Hays Member of the Niobrara Formation, in eight cores and one outcrop sample, revealed that progressive diagenetic alteration occurred with increasing burial depth and increasing temperatures. Cathodoluminescence petrography, scanning electron microscopy, geothermal …
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Paleontology and stratigraphy of the Niobrara Formation (Upper Cretaceous) of eastern North Dakota with emphasis on the calcareous nannoplankton
<p>The Upper Cretaceous Niobrara Formation in eastern North Dakota consists of calcareous shales, chalks, and shaly chalks. The formation was studied from surface exposures, cores, and well logs. The Niobrara is 62 feet (19m) to 272 feet (83 m) and is thickest to the northeast, in a central linear …
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3D modeling and characterization of hydraulic fracture efficiency integrated with 4D/9C time-lapse seismic interpretations in the Niobrara Formation, Wattenberg field, Denver Basin
Hydrocarbon recovery rates within the Niobrara Shale are estimated as low as 2-8%. These recovery rates are controlled by the ability to effectively hydraulic fracture stimulate the reservoir using multistage horizontal wells. Subsequent to any mechanical issues that affect production from lateral …
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Fluid flow and deformation history of the Denver basin, CO region: fluid inclusions, U-Pb geochronology and isotope geochemistry of calcite-filled fracture cements in the Niobrara Formation
… to middle Cenozoic by orogenesis, basin formation, and burial. The fracture network (e.g., joints, faults, open stylolites) acted as conduits for fluid flow. However, little to no constraints on the origin, temperature, composition, and timing of these fluid flow events exist. We address …
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Litho- and Biostratigraphic analysis of the Upper Cretaceous Carlile and Niobrara formations in southern Saskatchewan, Canada
The Carlile and Niobrara formations were deposited during the regressive phase of the Greenhorn cycle and the transgressive phase of the Niobrara cycle (early Turonian-late Santonian). The lateral distribution of these units was controlled by eustatic sea level changes and differential …
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Foraminifera from outcrops of the Pierre Shale (Upper Cretaceous) of North Dakota
… Valley City have been assigned to either the Niobrara formation (Leonard, 1906, p. 69 and Kresl, 1956) or the Pierre shale (Kline, 1942, p. 352), both Upper Cretaceous in age, whereas similar beds near Fort Ransom have been designated as part of the Niobrara formation (Kline, 1942, p. 352).</p>
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Faulting and natural fracturing across the DJ Basin: impacts on production from Hereford field, northern Colorado
… with good reason. The natural fractures in the Niobrara formation, specifically in the Niobrara B Chalk, have been the driving mechanism behind the production from this low-porosity, low-permeability reservoir; without which, it may not be a viable play. Therefore, understanding the controls on …
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Stratigraphy and paleontology of the upper Cretaceous Morden Member (Vermilion River Formation) in the outcrop area, northeastern North Dakota
… of the state. The Morden overlies the Greenhorn Formation and underlies the Niobrara Formation. The Canadian Morden Member of the Vermilion River Formation is used in lieu of the Carlile Formation because of the lithologic similarity and proximity to the Morden type area, and the distance from …