... at the surface. Significant dissolution of pyrite in the samples was observed. In addition, some pyrite crystals displayed fractures after H2 exposure. Clays in the rock matrix appear to have been altered by exposure to H2. A significant amount of disruption to the original clay matrix could be seen with some...

... a compositional numerical reservoir simulator, where the geochemical reactions are modeled using the Wolery geochemical database. Our results indicated the possibility of pyrite reduction, raising concerns about the formation of hydrogen sulfide in this sandstone saline aquifer. Introduction Hydrogen...

... transport is missing. This work helps develop a fundamental understanding of hydrogen reactivity, specifically at subsurface conditions with pyrite, and provides a first step to enable diversifying the suite of possible hydrogen geo-storage sites across the US. In this paper, we investigate...

... Abstract Anatase and pyrite are accessory minerals that are routinely found in both carbonate and clastic source rocks. Both are thought to precipitate in marine bottom sediments from trace elements derived from clays and micas, such as biotite. Near the sediment water interface, anoxia...

... of pyrite, could occur along with secondary precipitation of sulfate, carbonate, clay, and silicate phases. For the reservoir samples analyzed in this study, plausible reactions were identified based on bulk geochemical characterization techniques. Laboratory benchtop experimentation simulating reservoir...

... such as calcite and pyrite. Decreases in whole rock permeability can have a major detrimental effect on production, but mineral scaling on fracture surfaces and in the altered layer can have an effect on production that is not easily identifiable via whole rock permeability. Mineral scaling issues are multi-fold...

... Pore Combination Modeling) and resistivity measurements. Inputs to the inversion algorithms include volume concentrations of minerals, estimated from the multi-mineral analysis. The petrophysical model considers that brine forms the conductive background to which conductive (e.g., clay, pyrite, kerogen...

...-scale effects, clay, kerogen, pyrite, and water components. The model itself resides on several types of relations between bulk rock resistivity, resistivity, and the components’ volume fractions in a micro-inhomogeneous mixture. The target dataset includes results of laboratory core analysis and well...

... additives are prone to degradation under abiotic conditions. Solutions containing AEOs and PEGs were heated (80 °C) and stirred for 24 h in the presence of various components of shale and HFF—including shale powder, pyrite (FeS 2 ), additional Fe(II) (in the form of FeSO 4 ), and proppant. Low molecular...

...-SEM) images were obtained from four carbonate mudrock samples from the Middle East and were segmented into the individual components: calcite, organic matter, pore space, and pyrite. Each image was subdivided into eight sub-sections to study scale dependence. Image analysis provided component details...

... than an order of magnitude compared to bitumen-free systems. In addition, the availability of dissolved oxygen to pyrite grains is critical for Fe dynamics during shale-HFF interactions. The chemical reaction network obtained from this study, along with the bitumen-aided Fe(II) oxidation rate law, pave...

... Modeling & Simulation organic-rich mudrock conductivity volumetric concentration well logging cation exchange capacity electrical double layer interpretation Upstream Oil & Gas dielectric permittivity polarization log analysis frequency particle clay mineral pyrite...

... characterization trace metal release drilling mud pyrite Abstract Millions of tons of drill cuttings generated from Marcellus shale gas development are currently disposed of in landfills, buried in-situ, or reused as road fill. This study conducted advanced solids characterization and leaching tests...

... volcaniclastic laminae and pyrite distributed through the thickness. It can be divided into two intervals. The upper section is represented by calcareous mudstones prograding into siliciclastic mudstones in the center of the basin. This study is focused on the lower section. It corresponds to the maximum marine...

...-packs laced with commercial graphite flakes show that both the in-phase and out-of-phase measurements are altered in the same manner as the log measured values due to the presence of just a few volume percent of graphite flakes. The presence of pyrite particles produces an opposite effect...

... sample composition experiment reaction mseel pad fluid spw national energy technology laboratory exposure barite dissolution HFF pyrite influent URTeC: 2901634 Bench-Top Experiments Evaluating Simulated Hydraulic Fracturing Fluid Interactions with Marcellus Shale Core Johnathan Moore...

... not incorporate conductive components other than brine, such as kerogen and pyrite in interpretation of resistivity measurements. We introduce a new resistivity-based workflow which quantitatively assimilates the type and the spatial distribution of all conductive components to improve reserves evaluation...

... elemental gamma ray spectroscopy tool pyrite log-derived mineralogy operator spectroscopy tool URTeC: 2461155 Validation of Core-Based Mineralogy is Necessary for the Accurate Evaluation of Mineralogy Derived from Elemental Spectroscopy Logs John Longo, Aamir Siddiqui*, Baker Hughes Incorporated...

... Summary Determining the redox conditions of pore fluids during the deposition of organic-rich sediments is an integral part of reconstructing the depositional environment of source rocks. Multiple geochemical tools including degree of pyritization and trace metal enrichment are utilized...

... for 3 -D X-ray micro-computed tomographic ( XCT) imaging, performed at the Advanced Photon Source (APS). This effort has yielded microscale imaging, classification, and quantification of pores, organic matter, pyrite, and key pore-mineral associations. These data are complemented by Energy-dispersive X...