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The Assessment Unit is the fundamental unit used in the National Assessment Project for the assessment of undiscovered oil and gas resources. The Assessment Unit is defined within the context of the higher-level Total Petroleum System. The Assessment Unit is shown here as a geographic boundary interpreted, defined, and mapped by the geologist responsible for the province and incorporates a set of known or postulated oil and (or) gas accumulations sharing similar geologic, geographic, and temporal properties within the Total Petroleum System, such as source rock, timing, migration pathways, trapping mechanism, and hydrocarbon type. The Assessment Unit boundary is defined geologically as the limits of the geologic...
Groundwater samples collected from wells in eastern Sheridan County, Montana in the September, 2011.
Categories: Data;
Types: Downloadable,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
Shapefile;
Tags: Bakken Formation,
Eastern Sheridan County,
Montana,
Sheridan County,
United States of America,
The Assessment Unit is the fundamental unit used in the National Assessment Project for the assessment of undiscovered oil and gas resources. The Assessment Unit is defined within the context of the higher-level Total Petroleum System. The Assessment Unit is shown here as a geographic boundary interpreted, defined, and mapped by the geologist responsible for the province and incorporates a set of known or postulated oil and (or) gas accumulations sharing similar geologic, geographic, and temporal properties within the Total Petroleum System, such as source rock, timing, migration pathways, trapping mechanism, and hydrocarbon type. The Assessment Unit boundary is defined geologically as the limits of the geologic...
Contamination to aquatic resources from co-produced water (brine) associated with energy development has been documented in the northeastern portion of the Williston Basin; an area mantled by glacial drift. The presence and magnitude of brine contamination can be determined using the contamination index (CI) value from water samples. Recently, the U.S. Geological Survey published a section (~2.59 km2) level risk assessment of brine contamination to aquatic resources for Sheridan County, Montana, using oilfield and hydrogeological parameters. Our goal was to improve the Sheridan County assessment (SCA) and evaluate the use of this new Williston Basin assessment (WBA) across 31 counties mantled by glacial drift in...
The Bakken Formation is a Late Devonian/Early Mississippian geologic formation that consists of three thin but laterally continuous members spanning portions of Alberta, Manitoba, Montana, North Dakota and Saskatchewan. The members consist of two shale layers confining a sandstone/siltstone layer which is the primary producing layer. In April, 2013 the USGS completed an assessment of the Bakken Formations showing it is currently the largest known continuous oil resource in the contiguous US (Gaswirth et al., 2013,http://pubs.usgs.gov/fs/2013/3013/fs2013-3013.pdf).
Categories: Data;
Types: ArcGIS REST Map Service,
ArcGIS Service Definition,
Downloadable,
Map Service;
Tags: Bakken Formation,
oil and gas,
petroleum resources
Surface water samples collected from wetlands in eastern Sheridan County, Montana in the September, 2011.
Categories: Data;
Types: Downloadable,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
Shapefile;
Tags: Bakken Formation,
Eastern Sheridan County,
Montana,
Sheridan County,
United States of America,
The the Williston Basin has been a leading petroleum producer for over a half century with development beginning around the turn of the 20th century. The spatial and temporal spread of the associated wells is important from both an economic perspective but also a natural resource view. These data were gathered from the state/province oil and gas divisions for use by USGS researchers and their collaborators in water resource specific studies. Each state/province provides slightly different information for each well, with some providing more information and others less. We attempted to create a spatial cross-walk that allowed each database to be merged to one another to create a final regional spatial database. Each...
Categories: Data;
Types: Downloadable,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
Shapefile;
Tags: Bakken Formation,
Williston Basin,
geoscientificInformation,
oil and gas wells,
petroleum wells
The Williston Basin, in north-central United States and south-central Canada, has been a leading source of domestic oil and gas production for more than 50 years. This region, which includes parts of Montana, North Dakota, South Dakota, Saskatchewan, and Manitoba, is currently in the midst of a modern energy boom driven by advances in oil and gas production technologies. The main energy-producing formations associated with the current boom are the Bakken and Three Forks. A portion of the Williston Basin is overlain by the Prairie Pothole Region (PPR), which is known for its depressional wetlands that provide critical breeding and nesting habitats for a majority of North America’s migratory waterfowl as well as habitat...
The the Williston Basin has been a leading petroleum producer for over a half century with development beginning around the turn of the 20th century. The spatial and temporal spread of the associated wells is important from both an economic perspective but also a natural resource view. These data were gathered from the state/province oil and gas divisions for use by USGS researchers and their collaborators in water resource specific studies. Each state/province provides slightly different information for each well, with some providing more information and others less. We attempted to create a spatial cross-walk that allowed each database to be merged to one another to create a final regional spatial database. Each...
Categories: Data;
Types: ArcGIS REST Map Service,
ArcGIS Service Definition,
Downloadable,
Map Service;
Tags: Bakken Formation,
Energy Development,
Gas,
Oil,
Oil & Gas,
The USGS Central Region Energy Team assesses oil and gas resources of the United States. The onshore and State water areas of the United States comprise 71 provinces. Within these provinces, Total Petroleum Systems are defined and Assessment Units are defined and assessed. Each of these provinces is defined geologically, and most province boundaries are defined by major geologic changes. The Williston Basin Province is located in North Dakota, eastern Montana, and northwestern South Dakota, encompassing all or parts of Divide, Burke, Renville, Bottineau, Rolette, Towner, Cavalier, Pembina, Walsh, Grand Forks, Nelson, Ramsey, Benson, Eddy, Foster, Wells, Griggs, Steele, Traill, Cass, Barnes, Ransom, Richland, Sergeant,...
The the Williston Basin has been a leading petroleum producer for over a half century with development beginning around the turn of the 20th century. The spatial and temporal spread of the associated wells is important from both an economic perspective but also a natural resource view. These data were gathered from the state/province oil and gas divisions for use by USGS researchers and their collaborators in water resource specific studies. Each state/province provides slightly different information for each well, with some providing more information and others less. We attempted to create a spatial cross-walk that allowed each database to be merged to one another to create a final regional spatial database. Each...
Categories: Data;
Types: ArcGIS REST Map Service,
ArcGIS Service Definition,
Downloadable,
Map Service;
Tags: Bakken Formation,
Bakken Formation,
Williston Basin,
Williston Basin,
geoscientificInformation,
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