Publications
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Predicting S-wave velocities for unconsolidated sediments at low effective pressure
Accurate S-wave velocities for shallow sediments are important in performing a reliable elastic inversion for gas hydrate-bearing sediments and in evaluating velocity models for predicting S-wave velocities, but few S-wave velocities are measured at low effective pressure. Predicting S-wave velocities by using conventional methods based on the Biot-Gassmann theory appears to be inaccurate for labo
Authors
Myung W. Lee
Reserve growth during financial volatility in a technologically challenging world
Reserve growth (growth-to-known) is the addition of oil and gas quantities to reported proved or proved-plus-probable reserves in discovered fields. The amount of reserve growth fluctuates through time with prevailing economic and technological conditions. Most reserve additions are the result of investment in field operations and in development technology. These investments can be justified by hi
Authors
Timothy R. Klett, Donald L. Gautier
In-Place Oil Shale Resources Underlying Federal Lands in the Piceance Basin, Western Colorado
Using a geologic-based assessment methodology, the U.S. Geological Survey estimated an in-place oil shale resource of 1.07 trillion barrels under Federal mineral rights, or 70 percent of the total oil shale in place, in the Piceance Basin, Colorado. More than 67 percent of the total oil shale in-place resource, or 1.027 trillion barrels, is under Federal surface management.
Authors
Tracey J. Mercier, Ronald C. Johnson, Michael E. Brownfield, Jesse G. Self
Gas, oil, and water production from Grand Valley, Parachute, Rulison, and Mamm Creek fields in the Piceance Basin, Colorado
Gas, oil, and water production data for tight gas reservoirs were compiled from selected wells in western Colorado. These reservoir rocks—the relatively shallow Paleogene Wasatch G sandstone interval in the Parachute and Rulison fields and fluvial sandstones in the deeper Upper Cretaceous Mesaverde Group in the Grand Valley, Parachute, Rulison, and Mamm Creek fields—are characterized by low permea
Authors
Philip H. Nelson, Stephen L. Santus
Outcrops, fossils, geophysical logs, and tectonic interpretations of the Upper Cretaceous Frontier Formation and contiguous strata in the Bighorn Basin, Wyoming and Montana
In the Bighorn Basin of north-central Wyoming and south-central Montana, the Frontier Formation of early Late Cretaceous age consists of siliciclastic, bentonitic, and carbonaceous beds that were deposited in marine, brackish-water, and continental environments. Most lithologic units are laterally discontinuous. The Frontier Formation conformably overlies the Mowry Shale and is conformably overlai
Authors
E. A. Merewether, W. A. Cobban, R. W. Tillman
Assessment of In-Place Oil Shale Resources of the Green River Formation, Uinta Basin, Utah and Colorado
Using a geology-based assessment methodology, the U.S. Geological Survey estimated a total of 1.32 trillion barrels of oil in place in 18 oil shale zones in the Eocene Green River Formation in the Uinta Basin, Utah and Colorado.
Authors
Ronald C. Johnson, Tracey J. Mercier, Michael E. Brownfield, Jesse G. Self
Assessment of Undiscovered Oil and Gas Resources of the Nile Delta Basin Province, Eastern Mediterranean
The U.S. Geological Survey estimated means of 1.8 billion barrels of recoverable oil, 223 trillion cubic feet of recoverable gas, and 6 billion barrels of natural gas liquids in the Nile Delta Basin Province using a geology-based assessment methodology.
Authors
Mark A. Kirschbaum, Christopher J. Schenk, Ronald R. Charpentier, Timothy R. Klett, Michael E. Brownfield, Janet K. Pitman, Troy A. Cook, Marilyn E. Tennyson
Revised Subsurface Stratigraphic Framework of the Fort Union and Wasatch Formations, Powder River Basin, Wyoming and Montana
Described in this report is an updated subsurface stratigraphic framework of the Paleocene Fort Union Formation and Eocene Wasatch Formation in the Powder River Basin (PRB) in Wyoming and Montana. This framework is graphically presented in 17 intersecting west-east and north-south cross sections across the basin. Also included are: (1) the dataset and all associated digital files and (2) digital f
Authors
Romeo M. Flores, Brianne D. Spear, Peter A. Purchase, Craig M. Gallagher
S-Wave Normal Mode Propagation in Aluminum Cylinders
Large amplitude waveform features have been identified in pulse-transmission shear-wave measurements through cylinders that are long relative to the acoustic wavelength. The arrival times and amplitudes of these features do not follow the predicted behavior of well-known bar waves, but instead they appear to propagate with group velocities that increase as the waveform feature's dominant frequency
Authors
Myung W. Lee, William F. Waite
Assessment of Undiscovered Oil and Gas Resources of Southeast Asia, 2010
Using a geology-based assessment methodology, the U.S. Geological Survey (USGS) estimated means of 21.6 billion barrels of oil and 299 trillion cubic feet of undiscovered natural gas in 22 provinces of southeast Asia.
Assessment of Undiscovered Oil and Gas Resources of the Levant Basin Province, Eastern Mediterranean
The U.S. Geological Survey estimated a mean of 1.7 billion barrels of recoverable oil and a mean of 122 trillion cubic feet of recoverable gas in the Levant Basin Province using a geology based assessment methodology.
Geologic assessment of undiscovered oil and gas resources of the North Cuba Basin, Cuba
Petroleum generation in the North Cuba Basin is primarily the result of thrust loading of Jurassic and Cretaceous source rocks during formation of the North Cuba fold and thrust belt in the Late Cretaceous to Paleogene. The fold and thrust belt formed as Cuban arc-forearc rocks along the leading edge of the Caribbean plate translated northward during the opening of the Yucatan Basin and collided w
Authors
Christopher J. Schenk