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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Microanalytical Characterization of REE Phases in a Glauconitic Sandstone
Presented by NETL at Microscopy and Microanalysis 08/19
Review on Underlying Mechanisms of Low Salinity Waterflooding: Comparisons between Sandstone and Carbonate
Not provided.
Evaluation of CO 2 Storage Mechanisms in CO 2 Enhanced Oil Recovery Sites: Application to Morrow Sandstone Reservoir
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Transportation and Potential Enhanced Oil Recovery Mechanisms of Nanogels in Sandstone
Not provided.
Synthesis of Highly Nanoporous β-Silicon Carbide from Corn Stover and Sandstone
Not provided.
Manganese-Rich Sandstones as an Indicator of Ancient Oxic Lake Water Conditions in Gale Crater, Mars
Manganese has been observed on Mars by the NASA Curiosity rover in a variety of contexts and is an important indicator of redox processes in hydrologic systems on Earth. Within the Murray formation, an ancient primarily fine-grained lacustrine sedimentary deposit in Gale crater, Mars, have observed up to 45× enrichment in manganese and up to 1.5× enrichment in iron within coarser grained bedrock targets compared to the mean Murray sediment composition. This enrichment in manganese coincides with the transition between two stratigraphic units within the Murray: Sutton Island, interpreted as a lake margin environment, and Blunts Point, interpreted as a lake environment. On Earth, lacustrine environments are common locations of manganese precipitation due to highly oxidizing conditions in the lakes. Here, we explore three mechanisms for ferromanganese oxide precipitation at this location: authigenic precipitation from lake water along a lake shore, authigenic precipitation from reduced groundwater discharging through porous sands along a lake shore, and early diagenetic precipitation from groundwater through porous sands. All three scenarios require highly oxidizing conditions and we discuss oxidants that may be responsible for the oxidation and precipitation of manganese oxides. This work has important implications for the habitability of Mars to microbes that could have used Mn redox reactions, owing to its multiple redox states, as an energy source for metabolism.
A comprehensive experimental study on the mechanisms of waterflood inefficiency in a Morrowan sandstone reservoir
Not provided.
Nanometer-Scale Deformations of Berea Sandstone Under Moisture-Content Variations
Not Available
Laboratory seismic monitoring of supercritical CO2 flooding in sandstone cores using the Split Hopkinson Resonant Bar technique with concurrent x-ray CT imaging
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Salinity dependence of spectral induced polarization in sands and sandstones
In electrolyte-saturated sands, the reversible storage of electrical charges is responsible for a phase lag between the current (injected and retrieved by two current electrodes) and the electrical field recorded by two voltage electrodes. This phenomenon is called "spectral induced polarization" (SIP) in geophysics and can potentially be used to monitor salt tracer tests in shallow aquifers in order to infer their permeability and dispersivity tensors. We demonstrate analytically that the polarization of the inner part of the electrical triple layer coating the surface of the grains (named the Stern layer in electrochemistry) is consistent with available data. We also perform new experiments using silica sands saturated by NaCl and CaCl2 pore water solutions. The salinity dependence of quadrature conductivity can be modelled using an analytical solution of the triple layer model, which offers a simple way to interpret laboratory and field data. This analytical solution depends on the total site density of the mineral surface, the pH value, and the sorption coefficient of the cation in the Stern layer. This model shows that both the specific surface conductivity of the Stern layer and the quadrature conductivity of the porous material depend on the conductivity of the pore water. The quadrature conductivity is becoming independent of the salinity above 1 S m-1. The parameters entering the analytical model are consistent with independent estimates from titration data and zeta potential measurements, which are two classical methods to characterize the electrical triple layer at the pore water mineral interface.
Probing Dynamic Response to Temperature Changes in Berea Sandstone using Acoustic Time-of-Flight and Resonant Ultrasound Spectroscopy
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Using petrophysics to determine the presence of residual oil zones in the thick IVF Cypress Sandstone at Noble, southeastern Illinois
The methodology and findings of the petrophysical analysis being used to identify residual oil zones in the thick Cypress.
Reservoir characterization of the thick IVF Cypress Sandstone in Noble Field, Illinois, for nonconventional CO2-EOR
The preliminary findings from geologic and geocellular modeling of Noble Field.
Leveraging spontaneous potential and neutron density porosity logs to construct a geocellular model: An example from the thick Cypress Sandstone at Noble Field, Illinois
The use of spontaneous potential and porosity logs to create a geocellular model populated with porosity values and a method to populate the model with permeability values based on the porosity values, including a comparison of permeability and porosity values from the geocellular model and core.
Geochemical and Mechanical Evolution of Bluff and Entrada Sandstone Due to CO2-Fluid-Rock Interaction
Core scale analysis of outcrop cores from the formations being examined for geologic carbon storage in the San Juan Basin.