Digital subsurface database of elevation point data and structure contour maps of multiple subsurface units, Powder River Basin, Wyoming and Montana, USA

Dates

Publication Date: 2023-04-19
Start Date: 2013
End Date: 2023

Citation

Spangler, L., Melick, J., and Sweetkind, D., 2023, Digital subsurface database of elevation point data and structure contour maps of multiple subsurface units, Powder River Basin, Wyoming and Montana, USA: U.S. Geological Survey, data release, https://doi.org/10.5066/P953MC5C.

Summary

This digital data release presents subsurface data from multiple geologic units that were part of a previous study of the regional subsurface structural configuration of the Powder River Basin in Wyoming and Montana. The original data within this geodatabase is sourced from an unpublished doctoral dissertation by Jessie Melick at Montana State University (Melick, 2013). Data contained in this release were generated from elevation grids developed by Jessie Melick using 28,000 wells and geophysical well logs penetrating Paleozoic to Mesozoic strata over a 70,000 square-kilometer area designated by the Department of Energy as a realistic locality for geologic carbon sequestration (Melick, 2013). Information included in this release represents [...]

Summary

This digital data release presents subsurface data from multiple geologic units that were part of a previous study of the regional subsurface structural configuration of the Powder River Basin in Wyoming and Montana. The original data within this geodatabase is sourced from an unpublished doctoral dissertation by Jessie Melick at Montana State University (Melick, 2013). Data contained in this release were generated from elevation grids developed by Jessie Melick using 28,000 wells and geophysical well logs penetrating Paleozoic to Mesozoic strata over a 70,000 square-kilometer area designated by the Department of Energy as a realistic locality for geologic carbon sequestration (Melick, 2013). Information included in this release represents a small component of the larger geomodel, which includes rock-property details such as facies analysis, porosity calculations, and net to gross thickness, among others. Well locations, well identification numbers, geophysical logs, and any other non-public data or information used in the creation of this dataset has been explicitly omitted.

Data in this release includes elevation point features on the stratigraphic tops of the Mesaverde Group, Frontier Formation, Lakota Formation, Tensleep Formation, Madison Group, and Precambrian basement that were exported from the original horizon grids as points on a 500x500 m grid spacing. This release additionally contains structure contour maps of the tops of these same units; the contours were digitally generated from the point arrays using automated contouring methods within a geographic information system. Characterizing these units in the subsurface is of value, as they have been identified as potential reservoirs for the geologic sequestration of carbon, units of interest for geothermal energy production, may serve as regional groundwater aquifers, and are currently considered productive hydrocarbon reservoirs (Melick, 2013).

Formation top points and structure contours were formatted and attributed as GIS data sets for use in digital form as part of U.S. Geological Survey’s ongoing effort to inventory, catalog, and release subsurface geologic data in geospatial form. This effort is part of a broad directive to develop 2D and 3D geologic information at detailed, national, and continental scales. This data approximates, but does not strictly follow the USGS NCGMP GeMS data structure schema for geologic maps.Structure contour lines for each formation are stored within separate “IsoValueLine” feature classes, while formation tops for each formation are stored as point data in separate “MapUnitPoints” feature classes. These are distributed within a geographic information system geodatabase and are also saved as shapefiles. Contour and point data are provided in both feet and meters to maintain consistency with the original publication and for ease of use. Nonspatial tables define the data sources used, define terms used in the dataset, and describe the geologic units referenced herein. A tabular data dictionary describes the entity and attribute information for all attributes of the geospatial data and accompanying nonspatial tables.

Reference: Melick, J., 2013, SUBSURFACE DESCRIPTION AND MODELING OF GEOLOGIC HETEROGENEITY IN LARGE SUBSURFACE DATASETS: USING TEMPORAL AND SCALAR HIERARCHIES, POWDER RIVER BASIN, WY AND MT, U.S.A., Unpublished Doctoral Dissertation, Montana State University, Bozeman, Montana, 237 p.

Contacts

Point of Contact :: Leland R Spangler
Originator :: Leland R Spangler, Jesse J. Melick, Donald S Sweetkind
Metadata Contact :: Leland R Spangler
Publisher :: U.S. Geological Survey
Data Owner :: Geosciences and Environmental Change Science Center
Distributor :: U.S. Geological Survey - ScienceBase
USGS Mission Area :: Core Science Systems
SDC Data Owner :: Geosciences and Environmental Change Science Center

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PRB_StructureContours_Melick_METADATA.xml Original FGDC Metadata	View	26.41 KB	application/fgdc+xml
PRBMelick_EntityAndAttribute_DataDictionary.csv		8.55 KB	text/csv
PRB_Data_Melick_Geodatabase.zip		87.81 MB	application/zip
PRB_Data_Melick_Shapefiles.zip		51.57 MB	application/zip
Jesse PRB Data.png		135.66 KB	image/png

Related External Resources

Type: Online Link

Web Link	https://scholarworks.montana.edu/xmlui/handle/1/2657

Purpose

This digital dataset was created as part of U.S. Geological Survey efforts to inventory, catalog, and release subsurface geologic data in geospatial form as part of a broad directive to develop 2D and 3D geologic information at detailed, national, and continental scales. The elevation, thickness, and extent of subsurface geologic units are required to define the geologic layering in any digital geologic framework model; these data, derived from previous USGS and other studies, provide a fundamental starting point. The intended uses of this dataset include, but are not limited to, natural resource modeling, mapping, and visualization.

Digital subsurface database of elevation point data and structure contour maps of multiple subsurface units, Powder River Basin, Wyoming and Montana, USA

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