A5056615247- Hydrocarbon exploration and reservoir analysis
- Atmospheric and Environmental Gas Dynamics
- Hydraulic Fracturing and Reservoir Analysis
- CO2 Sequestration and Geologic Interactions
- Geology and Paleoclimatology Research
- Geochemistry and Geologic Mapping
- Groundwater flow and contamination studies
- Methane Hydrates and Related Phenomena
- Geological and Geochemical Analysis
- Arsenic contamination and mitigation
- Soil Management and Crop Yield
- Soil erosion and sediment transport
- Groundwater and Isotope Geochemistry
- Recycling and Waste Management Techniques
- Reservoir Engineering and Simulation Methods
- Geochemistry and Elemental Analysis
- Geological Modeling and Analysis
- Peatlands and Wetlands Ecology
- Enhanced Oil Recovery Techniques
- Geological formations and processes
- Rice Cultivation and Yield Improvement
- Mine drainage and remediation techniques
- Coal Properties and Utilization
- Extraction and Separation Processes
- Seismic Imaging and Inversion Techniques
Pennsylvania State University
2018-2021
National Energy Technology Laboratory
2016
University of Wyoming
2013-2016
Abstract As bedrock weathers to regolith – defined here as weathered rock, saprolite, and soil porosity grows, guides fluid flow, liberates nutrients from minerals. Though vital terrestrial life, the processes that transform into are poorly understood, especially in deep regolith, where direct observations difficult. A 65-m-deep borehole Calhoun Critical Zone Observatory, South Carolina, provides unusual access a complete weathering profile an Appalachian granitoid. Co-located geophysical...
Core Ideas Two new subcatchments are used to test the importance of lithology and land use. Differences in use result differences soils waters. Despite differences, all catchments have a shallow deep water table. The relative flow paths controls distinct chemistry response discharge. Cross‐site comparison will ultimately enable upscaling from catchment large scale. footprint Susquehanna Shale Hills Critical Zone Observatory was expanded 2013 forested subcatchment (0.08 km 2 ) most Shavers...
Methane (CH4) enters waters in hydrocarbon-rich basins because of natural processes and problems related to oil gas wells. As a redox-active greenhouse gas, CH4 degrades water or emits the atmosphere contributes climate change. To detect if methane migrated from hydrocarbon wells (i.e., anomalous methane), we examined 20 751 methane-containing groundwaters Upper Appalachian Basin (AB). We looked for concentrations (mg/L) that indicated AB brine salts (chloride ([Cl]) > 30; [Ca]/[Na] < 0.52)...
Abstract More above‐ground biomass (kg m −2 ) grows in the northern Appalachian Mountains (USA) forests on shale than sandstone at all landscape positions other ridgetops. This has been tentatively attributed to physical (rather chemical) attributes of substrates, such as elevation, particle size, and water capacity. However, shales have generally similar phosphorus (P) concentrations sandstones and, Valley Ridge province, they erode more quickly. led us hypothesize that faster replenishment...
Abstract Oxidative weathering of pyrite plays an important role in the biogeochemical cycling Fe and S terrestrial environments. While mechanism occurrence biologically accelerated oxidation under acidic conditions are well established, much less is known about microbially mediated at circumneutral pH. Recent work (Percak‐Dennett et al., 2017, Geobiology , 15, 690) has demonstrated ability aerobic chemolithotrophic microorganisms to accelerate pH proposed two mechanistic models by which this...
Mobilizing trace metals with injection of supercritical CO2 into deep saline aquifers is a concern for geologic carbon sequestration. Hydrothermal experiments investigate the release harmful from two zones sequestration reservoir: at caprock-reservoir boundary and deeper within reservoir, away caprock. In both systems, Cd, Cr, Cu, Pb, Zn behave in similar manner, increasing concentration injection, but subsequently decreasing over time. SEM images geochemical models indicate initial...
As natural gas has grown in importance as a global energy source, leakage of methane (CH4) from wells sometimes been noted. Leakage this greenhouse is important because it affects groundwater quality and, when emitted to the atmosphere, climate. We hypothesized that streams might be most contaminated by CH4 northern Appalachian Basin regions with longest history hydrocarbon extraction activities. To test this, we searched for CH4-contaminated Basin. Methane concentrations ([CH4]) 529 stream...