A5071748071- Hydrocarbon exploration and reservoir analysis
- Hydraulic Fracturing and Reservoir Analysis
- Methane Hydrates and Related Phenomena
- Paleontology and Stratigraphy of Fossils
- Geological formations and processes
- Geological Modeling and Analysis
- Geological and Geochemical Analysis
- Seismic Imaging and Inversion Techniques
- Drilling and Well Engineering
- Enhanced Oil Recovery Techniques
- Grouting, Rheology, and Soil Mechanics
- Geology and Paleoclimatology Research
- Fluid Dynamics Simulations and Interactions
- Reservoir Engineering and Simulation Methods
- Image Processing and 3D Reconstruction
- Geochemistry and Elemental Analysis
- Geochemistry and Geologic Mapping
- Landfill Environmental Impact Studies
- Archaeology and ancient environmental studies
- Rock Mechanics and Modeling
- Minerals Flotation and Separation Techniques
- Groundwater and Isotope Geochemistry
- Geological Studies and Exploration
- Italy: Economic History and Contemporary Issues
- Fluid Dynamics and Heat Transfer
The University of Texas at Austin
2004
Bureau of Economic Analysis
2004
University of Illinois Urbana-Champaign
1989-1993
University of Illinois System
1987
Abstract Fracture pattern development has been a challenging area of research in the Earth sciences for more than 100 years. Much learned about spatial and temporal complexity inherent to these systems, but severe challenges remain. Future advances will require new approaches. Chemical processes play larger role opening‐mode fracture hitherto appreciated. This review examines relationships between mechanical geochemical that influence patterns recorded natural settings. For fractures formed...
Existing quartz cement models assume that the rate of growth per unit surface area is independent grain size. Application one such model to four geologically diverse data sets reveals a systematic error with size values in finer grained sandstones are overpredicted. Our laboratory synthesis overgrowths indicates this grain-size effect results from more rapid development euhedral crystal forms on smaller grains. Experiments show along c axis drops by factor about 20 after faces develop....
We have developed a model for the formation of fibrous illite in sandstones where kaolinite is primary reactant and potassium derived from in-situ K-feldspar grain dissolution or imported into reference frame. Illite fiber nucleation growth are modeled using Arrhenius expressions that consider saturation state addition to temperature time. Nucleation occurs on pore walls, muscovite detrital may be defined as energetically favorable substrates. The integrated with other Touchstone™ models...
Diagenetic processes alter petrophysical properties, such as porosity and permeability, of clastic sediments. An understanding these is therefore pivotal for any reservoir quality assessments. Thermal exposure among the crucial factors influencing diagenesis can vary significantly in widespread formations, e.g. due to regional variations burial history. Especially quartz overgrowth controlled by temperature we here demonstrate effect spatial thermal variability on degree cementation. Our...
Silicate reaction kinetics provide a complementary means to other established paleothermal indicators such as organic maturation for evaluating thermal reconstructions. In this study we combine the use of an model with kinetic models quartz and illite cementation evaluate burial history scenarios five subsalt wells in lithologically structurally complex Rotliegendes reservoirs. Models are most sensitive maximum temperature no direct evidence time peak or overall duration high temperatures....
Abstract High-resolution scanning electron microscope (SEM)-based cathodoluminescence images were used to reconstruct incremental fracture opening in regional opening-mode fractures sandstone. Opening is recorded by crack-seal texture isolated mineral bridges that span formed sandstone at moderate-great depth ( c. 1000–6000 m). We restored histories of nine representative with apertures millimetres five sandstones from sedimentary basins. Gaps created widening 11 range less than 1 μm more...
Aeolian sandstones are capable of forming excellent reservoir rock due to their textural and compositional maturity. Often spanning across large areas, such formations may however experience spatial variability in burial temperature exposure potentially leading a heterogeneous diagenesis subsequent quality. To assess potential variability, this case study focusses on the aeolian units Lower Jurassic Etjo Formation Namibia, exposed at three key localities lying >100 km apart from each other....
Artificially cemented sandstones were produced to assess the impact of detrital texture and composition on precipitation distribution early calcite cement, cement-related degradation in porosity. To simulate early-calcite cementation, loose sediment variable (siliciclastic calcareous) grain size was exposed a supersaturated solution for 35 58 days at 23°C. Identification newly precipitated crystals performed with high resolution 2D optical scanning electron microscopy. The experimental...
Summary Sandstone reservoir quality prediction has moved from a reliance on simple empirical trends (e.g., porosity vs. depth) to include process-oriented forward models. Process-oriented models are more accurate than because they simulate compaction and the kinetics geochemical reactions while accounting for composition, texture, burial history. Additionally, incorporate of other rock properties such as permeability seismic velocities. Although have had considerable success, do not depict...