A5061749905- Hydrocarbon exploration and reservoir analysis
- Hydraulic Fracturing and Reservoir Analysis
- Drilling and Well Engineering
- Geological and Geochemical Analysis
- Seismic Imaging and Inversion Techniques
- Rock Mechanics and Modeling
- Paleontology and Stratigraphy of Fossils
- earthquake and tectonic studies
- Geological formations and processes
- Geological Studies and Exploration
- Methane Hydrates and Related Phenomena
- Enhanced Oil Recovery Techniques
- CO2 Sequestration and Geologic Interactions
- Reservoir Engineering and Simulation Methods
- Marine and environmental studies
- Atmospheric and Environmental Gas Dynamics
- Geological and Geophysical Studies
- Geochemistry and Geologic Mapping
- Groundwater flow and contamination studies
- High-pressure geophysics and materials
- Geotechnical and Geomechanical Engineering
- Groundwater and Isotope Geochemistry
- nanoparticles nucleation surface interactions
- Geological Formations and Processes Exploration
- Geological and Tectonic Studies in Latin America
The University of Texas at Austin
2012-2022
Bureau of Economic Analysis
2013-2020
Bureau of Economic Geology
2019
Virginia Tech
2006-2013
Fluid inclusions that homogenize by disappearance of the halite crystal after vapor bubble has disappeared have been reported from a wide range ore-forming systems. While this inclusion type is most commonly observed in porphyry copper and similar magmatichydrothermal ore deposits, they also iron oxide copper-gold (IOCG), Mississippi Valley-type, orogenic (lode, greenstone) gold, massive sulfide, unconformity U, mantotype as well non-ore associated granitoids oceanic crust. The lack...
The Upper Cretaceous Mesaverde Group in the Piceance Basin, Colorado, is considered a continuous basin-centered gas accumulation which charge of low-permeability sandstone occurs under high pore-fluid pressure response to generation. High favors formation pervasive systems opening-mode fractures. This view contrasts with thatofothermodelsoflow-permeabilitygasreservoirsinwhich migrates by buoyant drive and accumulates conventional traps, fractures an incidental attribute these reservoirs. We...
Natural fractures form preferred pathways for basinal fluid flow and associated heat mass transport. In gas sandstone reservoirs with low matrix permeability, provide between organic-rich source reservoir layers during charge, pores, hydraulic fractures, the well bore production. While formation of natural has previously been generation pore-fluid pressure increase through a process referred to as fracturing, other driving mechanisms such stress changes by tectonic or exhumation processes...
Fluid inclusions in clearly defined fluid inclusion assemblages (FIAs) from various geologic environments were examined to assess the uncertainty associated with determining temperature of a event based on homogenization temperatures (Th). A is as physical or chemical process such healing microfracture formation growth zone crystal that occurs presence phase and results trapping form an FIA. Examination data large number events collected within rigorous temporal spatial (paragenetic)...
Abstract Fracture-hosted porosity and quartz distribution along with crack-seal texture fluid inclusion assemblage sequences in isolated, bridging deposits show that open fractures can persist through protracted burial uplift foreland basins. Fractures oriented at a high angle to current maximum compressive stress remain were weak mechanical discontinuities for millions of years even great depth. Upper Cretaceous Frontier Formation sandstones the basement-involved (Laramide) Table Rock...
Exceptionally large, well-exposed sandstone outcrops in New York provide insights into folds, deformation bands, and fractures that could influence permeability, heat exchange, stimulation outcomes of geothermal reservoir targets. Cambrian Potsdam Sandstone with <5% porosity contains decimeter-scale open, angular-limbed monoclines <0.5 km apart associated low-porosity mm-wide cataclastic bands. Crossing abutting relationships among sub-vertical opening-mode show four...
Crack-seal texture within fracture cements in the Triassic El Alamar Formation, NE Mexico, shows that fractures opened during precipitation of quartz cements; later, overlapping calcite further occluded pore space. Previous workers defined four systematic sets, A (oldest) to D (youngest), with relative timing constrained by crosscutting relationships. Quartz fluid inclusion homogenization temperatures are higher Set B (148 ± 20°C) than C (105 12°C). These data and previous burial history...
Ordovician carbonate rocks of the Yijianfang Formation in Tabei Uplift, Tarim Basin, contain deeply buried (>6000 m), highly productive oil and gas reservoirs associated with large cavities (>10 m). Previous workers inferred that are paleocaves (paleokarst) formed near surface subsequently buried. Alternately, caves may have by dissolution at depth along faults. Using 227 samples from 16 cores, we document textures cement compositions bearing on cavity histories petrographic,...
Research Article| April 15, 2019 Natrocarbonatites: A hidden product of three-phase immiscibility Tibor Guzmics; Guzmics * 1Lithosphere Fluid Laboratory, Eötvös University Budapest, 1117 Pázmány P.stny 1/C, Hungary *E-mail: tibor.guzmics@gmail.com Search for other works by this author on: GSW Google Scholar Márta Berkesi; Berkesi Robert J. Bodnar; Bodnar 2Fluids Group, Virginia Tech, 4053A Derring Hall, Blacksburg, 24061, USA András Fall; Fall 3Bureau Economic Geology, Jackson School...
Homogenization temperature variations of several degrees Celsius or more are often observed within a group fluid inclusions that appear to have all trapped the same homogeneous at time and presumably PTX conditions. For homogenize T ≤ ≈230°C, much variation can be attributed size inclusions. Larger higher temperatures compared smaller with density. The relationship between inclusion homogenization is predicted by Young-Laplace equation relates stability vapor bubble surface tension pressure...
Summary URTeC 1580135 Economic production of oil and gas from mudrocks such as the Devonian Marcellus Shale relies on hydraulic fracture stimulation. The orientation, size, porosity, strength subsurface natural systems can influence growth fractures by conducting fluid, opening, or slipping during treatment. Knowledge other attributes in is based core outcrop data. Fractures may not be same age, however, uncertainty knowledge timing origin impedes use data for applications. Previous studies...
Cretaceous Mesaverde Group sandstones contain opening-mode fractures lined or filled by quartz and, locally, calcite cement. Fracture occlusion is controlled primarily fracture size, age and thermal history. highly heterogeneous, with open calcite-sealed found at adjacent depths. In the Piceance in other basins, processes that control distribution of these cements have been uncertain. Using pore cement petrography, fluid inclusions, isotopic elemental analysis, we show host-rock...
The uppermost Middle Triassic Leikoupo Formation in the western Sichuan Basin of China has recently been shown to host as much 5.3 tcf (1.5 × 1012 m3) natural gas resources. reservoir rocks, composed mainly microbially derived dolomudstone (e.g., thrombolites and stromatolites), are characterized by low porosity (<8%) permeability (<0.001 10 md). limestone is commonly tight not quality because abundant meteoric calcite cementation, whereas dolostone various types pores dominated...
Abstract Oxygen isotope analyses of diagenetic cements can provide detailed evidence sedimentary burial processes and conditions, as the δ18O values precipitating minerals reflect contemporaneous local δ18Owater temperature conditions. Uncertainties in timing rates pore water evolution basins complicate interpretation these records. Fracture-bridging (0.5–1 mm) quartz observed sandstones Cretaceous Travis Peak Formation East Texas basin show clear growth-zoning by cathodoluminescence contain...
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