A5015981763- Hydraulic Fracturing and Reservoir Analysis
- Groundwater flow and contamination studies
- Drilling and Well Engineering
- Seismic Imaging and Inversion Techniques
- CO2 Sequestration and Geologic Interactions
- Soil and Unsaturated Flow
- Landslides and related hazards
- Geophysical Methods and Applications
- Rock Mechanics and Modeling
- Hydrology and Watershed Management Studies
- Seismic Waves and Analysis
- Reservoir Engineering and Simulation Methods
- Geophysical and Geoelectrical Methods
- Methane Hydrates and Related Phenomena
- Advanced Fiber Optic Sensors
- Scientific Computing and Data Management
- Soil Moisture and Remote Sensing
- Hydrocarbon exploration and reservoir analysis
- Microbial bioremediation and biosurfactants
- Grouting, Rheology, and Soil Mechanics
- Geotechnical Engineering and Underground Structures
- Seismology and Earthquake Studies
- Radioactive element chemistry and processing
- Geological Modeling and Analysis
- Electrokinetic Soil Remediation Techniques
Charles River Laboratories (Netherlands)
2024
Clemson University
2014-2023
Protein Express (United States)
2023
John Wiley & Sons (United States)
2018-2020
Advent Systems (United States)
2007
Geosyntec Consultants (United States)
2005
Colorado School of Mines
1999-2005
Weatherford College
2003
University of Cincinnati
1990-2000
Oak Ridge National Laboratory
1999
The simplicity of a pan‐and‐bag seepage meter makes it an attractive tool for variety hydrologic investigations, but the performance this device is far from simple. Laboratory experiments show that hydraulic head required to fill collection bags can range 0.5 mm several millimeters at flow rates typical meters, and additional will divert water away pan. A theoretical analysis gives semianalytical expression flux captured by using bag. shows bag conductance, radius pan, conductivity stream...
Hydraulic fracturing appears to have useful environmental and geotechnical applications, but the details of fracture morphology propagation in soil are poorly known. To identify those details, more than 100 hydraulic fractures were created by dyed glycerine injected into rectangular blocks silty clay confined within a triaxial loading cell. The traces observed directly through transparent plate experimental apparatus, surfaces described after they had been exposed being split open. Steps...
Hydraulic fractures have been created in fine-grained formations at depths of 2–10 m to improve the performance environmental remediation projects dozens locations and a wide range geologic conditions. The effectiveness hydraulic fracture during will depend primarily on its form; that is, shape, thickness, orientation, length, width, location with respect borehole. forms many determined by mapping exposures excavations compiling split-spoon sampling data. These observations indicate typical...
The characteristics of hydraulic fractures created at shallow depths are known from excavations and borings, but this understanding has lagged behind the ability to predict fracture growth. This paper describes a simple analysis based on elasticity theory mechanics that will relatively flat lying. gives closed-form expressions for injection pressure, aperture, radial length as functions time, toughness, elastic modulus. is first used estimate toughness modulus formations field tests...
In low permeability but naturally fractured media, vertical leaching or volatilization of toxic organic compounds can lead to high exposures and unacceptable human health environmental risk. A field test was recently completed evaluate in situ remediation at such sites by using hydraulic fracturing emplace iron metal (Fe0) permanganate (KMnO4) solids the subsurface chemically treat trichloroethylene (TCE). At an old land treatment site, two cells were installed silty clay soils with...
The hydraulic conductivity of submerged sediments influences the interaction between ground water and surface water, but few techniques for measuring K have been described with conditions setting in mind. Two simple, physical methods developed, one them uses a well piezometers similar to tests performed terrestrial aquifers. This test is based on theoretical analysis that constant-head boundary condition upper aquifer represent effects overlying body. Existing analyses used measure may...
The response of deformable fractures to changes in fluid pressure controls phenomena ranging from the flow fluids near wells propagation hydraulic fractures. We developed an analysis designed simulate flows vicinity asperity-supported at rest, or fully open that might be propagating. Transitions between at-rest and propagating can also simulated. This is accomplished by defining contact aperture as when asperities on a closing fracture first make contact. Locations where less than are loaded...
Abstract The goal of this project is to develop techniques for monitoring hydraulic fractures in reservoirs by injecting electrically conductive, dielectric, or magnetically permeable proppants. contrasts between the properties proppants and subsurface provided basis imaging using geophysical methods. initial experiments focused on a series small, shallow fractures; however, methods applicable oil-field fractures. began screening different proppant types laboratory numerical analyses that...
Abstract Storing and recovering water, carbon, heat from geologic reservoirs is central to managing resources in a changing climate. We tested the hypothesis that strain tensor caused by injecting or producing fluids can be measured at shallow depths interpreted advance understanding of underlying deep aquifers reservoirs. Geodetic‐grade strainmeters were deployed 30 m depth overlying Bartlesville Formation, 500‐m‐deep sandstone near Tulsa, OK. The are 220 east injection well 9A completed...
The propagation of hydraulic fractures in soil was studied the laboratory by glycerine injected at a constant rate into rectangular samples silty clay confined triaxial cell. During propagation, trace fracture appeared on side cell as nearly straight, narrow line that tapered from 0-05 mm to negligible aperture tip. Pressure recorded function time and is characterized period linear increase, break slope followed increasing pressure but decreasing slope, maximum, then pressure. Tests...
A theoretical analysis is developed to explain observations from laboratory experiments where hydraulic fractures were created in silty clay soil. The based on a critical stress intensity criterion for propagation. fracture assumed be two-dimensional slit embedded an elastic material of infinite extent. It filled with one fluid that injected at the mid-line and another infiltrates tip. Other parameters included are initial length, modulus, pressure tip, growth infiltrated region toughness,...
Potassium permanganate was encapsulated in various polymers to create microcapsules with slow-release properties. Batch tests were conducted evaluate the rates at which release permanganate. The histories of 18 different polymer formulations varied strongly, but average initial rate 2.70gKMnO4 released g KMnO4initial−1d−1, and typically decreased time. total duration ranged from 3to80days, an 27days. In other batch trichloroethene (TCE) degraded below detectable amounts by microcapsules....
Abstract This article introduces hydromechanical well tests as a viable field method for characterizing fractured rock aquifers. These involve measuring and analyzing small displacements along with pressure transients. Recent developments in equipment analyses have simplified tests, this describes initial results interpretations during slug constant‐rate pumping conducted at site underlain by biotite gneiss South Carolina. The data are characterized of 0.3 μm to more than 10 head changes up...
Geologic carbon storage currently implies that CO2 is injected into reservoirs more than 1 km deep, but this concept of geologic can be expanded to include the injection solid, carbon-bearing particles formations are one two orders magnitude shallower conventional reservoirs. Wood half carbon, available in large quantities at a modest cost, and milled as slurry. We demonstrate feasibility shallow by field experiment, process also raises ground surface. The resulting uplift rates upscale...
We compared two methods for estimating groundwater flux into a stream reach: seepage meters and Darcian calculations. Both were applied at the same 53 points on streambed of 62.5‐m‐long reach West Bear Creek in coastal plain North Carolina. At each point, meter was used to measure flux, v , several minutes later hydraulic conductivity ( K ) head gradient J measured. paired point values from method darcy = KJ ), integrated volumetric Q spatial distributions streambed. Values (268 m 3 /d) mean...
This study was conducted to experimentally demonstrate removal of a chlorinated volatile organic compound from fractured rock by boiling. A Berea sandstone core contaminated injecting water containing dissolved 1,2-DCA (253 mg/L) and sodium bromide (144 mg/L). During heating, the sealed except for one end, which open atmosphere simulate an fracture. temperature gradient toward outlet observed when boiling occurred in core. indicates that steam generated pressure developed outlet, pushing...