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USGS Updates the National Produced Waters Geochemical Database and Map Viewer!

The USGS has updated the National Produced Waters Geochemical Database and Map Viewer to include trace elements, isotopes, and time-series data, as well as nearly 100,000 new samples with greater spatial coverage and from both conventional and unconventional well types, including...

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USGS Updates the Geologic CO2 Sequestration Interactive Web Map!

The USGS has updated the Geologic CO2 Sequestration Interactive Web Map to include links to the national assessment results, supporting information for all assessed areas, and report downloads. The update also features an improved navigational interface. As basin specific reports are released...

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Geologic Framework for the National Assessment of Carbon Dioxide Storage Resources—U.S. Gulf Coast

Chapter H - This report presents 27 storage assessment units (SAUs) within the United States (U.S.) Gulf Coast. The U.S. Gulf Coast contains a regionally extensive, thick succession of clastics, carbonates, salts, and other evaporites that were deposited in a highly cyclic depositional...

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Spatial and Stratigraphic Distribution of Water in Oil Shale of the Green River Formation Using Fischer Assay, Piceance Basin, Northwestern Colorado

The spatial and stratigraphic distribution of water in oil shale of the Eocene Green River Formation in the Piceance Basin of northwestern Colorado was studied in detail using some 321,000 Fischer assay analyses in the U.S. Geological Survey oil-shale database. The oil-shale section was subdivided into 17 roughly time-stratigraphic intervals, and the distribution of water in each interval was assessed separately. This study was conducted in part to determine whether water produced during retorting of oil shale could provide a significant amount of the water needed for an oil-shale industry. Recent estimates of water requirements vary from 1 to 10 barrels of water per barrel of oil produced, depending on the type of retort process used. Sources of water in Green River oil shale include (1) free water within clay minerals; (2) water from the hydrated minerals nahcolite (NaHCO3), dawsonite (NaAl(OH)2CO3), and analcime (NaAlSi2O6.H20); and (3) minor water produced from the breakdown of organic matter in oil shale during retorting. The amounts represented by each of these sources vary both stratigraphically and areally within the basin. Clay is the most important source of water in the lower part of the oil-shale interval and in many basin-margin areas. Nahcolite and dawsonite are the dominant sources of water in the oil-shale and saline-mineral depocenter, and analcime is important in the upper part of the formation. Organic matter does not appear to be a major source of water. The ratio of water to oil generated with retorting is significantly less than 1:1 for most areas of the basin and for most stratigraphic intervals; thus water within oil shale can provide only a fraction of the water needed for an oil-shale industry.

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Geologic Framework for the National Assessment of Carbon Dioxide Storage Resources—Denver Basin, Colorado, Wyoming, and Nebraska

Chapter G - This is a report about the geologic characteristics of five storage assessment units (SAUs) within the Denver Basin of Colorado, Wyoming, and Nebraska. These SAUs are Cretaceous in age and include (1) the Plainview and Lytle Formations, (2) the Muddy Sandstone, (3) the Greenhorn...

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Delineation of brine contamination in and near the East Poplar oil field, Fort Peck Indian Reservation, northeastern Montana, 2004–09

The extent of brine contamination in the shallow aquifers in and near the East Poplar oil field is as much as 17.9 square miles and appears to be present throughout the entire saturated zone in contaminated areas. The brine contamination affects 15–37 billion gallons of groundwater. Brine...

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Coalbed Natural Gas Exploration, Drilling Activities, and Geologic Test Results, 2007–2010, Wainwright, Alaska

The U.S. Geological Survey, in partnership with the U.S. Bureau of Land Management, the North Slope Borough, and the Arctic Slope Regional Corporation conducted a four-year study designed to identify, define, and delineate a shallow coalbed natural gas (CBNG) resource with the potential to...

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Characterization of the Marcellus Shale Based on Computer-Assisted Correlation of Wireline Logs in Virginia and West Virginia

The Middle Devonian Marcellus Shale in the Appalachian basin extends from central Ohio on the west to eastern New York on the east, and from north-central New York on the north to northern Tennessee on the south. Its thickness ranges from 0 feet (ft) where it pinches out to the west to as much...

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Marine Methane Hydrate Field Research Plan

In 2013, the U.S. Department of Energy’s (DOE) National Energy Technology Laboratory (NETL), in partnership with the Consortium for Ocean Leadership (COL), initiated a new field-focused methane hydrate research planning effort that would inform, and potentially lead to, future off shore drilling field expeditions.

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Series of Five Maps Characterizing Geopressure Gradients Based on Mud Weight Measurements Covering Part of Southern Louisiana, State, and Federal Water

This series of five maps characterizes the subsurface pressure system of southern Louisiana, including the associated State and Federal waters. These maps were generated using the U.S. Geological Survey’s (USGS) comprehensive geopressure-gradient model (Burke et al., 2012b, 2013) that...

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A Framework for Assessing Water and Proppant Use and Flowback Water Extraction Associated with Development of Continuous Petroleum Resources

The USGS is developing approaches for the quantitative assessment of water and proppant involved with possible future production of continuous petroleum deposits. The assessment approach is an extension of existing USGS petroleum-assessment methods, and it aims to provide objective information...

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Detailed Cross Sections of the Eocene Green River Formation

This report presents two detailed cross sections of the Eocene Green River Formation in the Piceance Basin, northwestern Colorado, constructed from eight detailed measured sections, fourteen core holes, and two rotary holes. The Eocene Green River Formation in the Piceance Basin contains the world’s largest known oil shale deposit with more than 1.5 billion barrels of oil in place. It was deposited in Lake Uinta, a long-lived saline lake that once covered much of the Piceance Basin and the Uinta Basin to the west. The cross sections extend across the northern and eastern margins of the Piceance Basin and are intended to aid in correlating between surface sections and the subsurface in the basin.

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Linking Compositional Data Analysis with Thermodynamic Geochemical Modeling: Oilfield Brines from the Permian Basin, USA

Compositional data analysis (CoDa) of sedimentary basin brines can help reveal the hydrogeochemical history of hydrocarbon producing formations. CoDa uses log-ratio transformations to convert compositional data into Euclidean space, a necessary assumption for many mathematical models and...

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The 66th Annual Meeting of the International Committee for Coal and Organic Petrology (ICCP)!

The 66th meeting of the International Committee for Coal and Organic Petrology (ICCP) will take place in Kolkata, India from 20-27 September, 2014. Meeting venue will be Science City, Kolkata. The meeting is organised and hosted by Dr. Ashok K. Singh, Principal Scientist and Head of the group...

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The 31st Annual Meeting of the Society for Organic Petrology (TSOP)!

The 31st Annual Meeting of the Society for Organic Petrology (TSOP) will be held in Sydney, Australia from September 27 to October 3, 2014. This represents the 10th anniversary of the successful and highly acclaimed Sydney meeting held in 2004, and again provides an opportunity to showcase...

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USGS Releases First-Ever National Wind Turbine Map & Database

This data set provides industrial-scale onshore wind turbine locations in the United States through July 22, 2013, corresponding facility information, and turbine technical specifications. The database has more than 47,000 wind turbine records that have been collected, digitized, ...

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Geologic Framework for the National Assessment of Carbon Dioxide Storage Resources—Greater Green River Basin, Wyoming, Colorado, and Utah, and Wyoming-Idaho-Utah Thrust Belt

Chapter E - This report identifies and contains geologic descriptions of 14 storage assessment units (SAUs) in Ordovician to Upper Cretaceous sedimentary rocks within the Greater Green River Basin (GGRB) of Wyoming, Colorado, and Utah, and eight SAUs in Ordovician to Upper Cretaceous...

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In-Place Oil Shale Resources in the Saline-Mineral and Saline-Leached Intervals, Parachute Creek Member of the Green River Formation, Piceance Basin, Colorado

A recent U.S. Geological Survey analysis of the Green River Formation of the Piceance Basin in western Colorado shows that about 920 and 352 billion barrels of oil are potentially recoverable from oil shale resources using oil-yield cutoffs of 15 and 25 gallons per ton (GPT), respectively. This...

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Geologic Assessment of Undiscovered Oil and Gas Resources—Oligocene Frio and Anahuac Formations, United States Gulf of Mexico Coastal Plain and State Waters

The Oligocene Frio and Anahuac Formations were assessed as part of the 2007 U.S. Geological Survey (USGS) assessment of Tertiary strata of the U.S. Gulf of Mexico Basin onshore and State waters. The Frio Formation, which consists of sand-rich fluvio-deltaic systems, has been one of the largest...

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Differentiation of pre-existing trapped methane from thermogenic methane in an igneous-intruded coal by hydrous pyrolysis

So as to better understand how the gas generation potential of coal changes with increasing rank, same-seam samples of bituminous coal from the Illinois Basin that were naturally matured to varying degrees by the intrusion of an igneous dike were subjected to hydrous pyrolysis (HP) conditions of 360 °C for 72 h.

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Page Last Modified: Wednesday, April 18, 2012