Appalachian Basin Play Fairway Analysis: Thermal Quality Analysis in Low-Temperature Geothermal Play Fairway Analysis (GPFA-AB)

This collection of files are part of a larger dataset uploaded in support of Low Temperature Geothermal Play Fairway Analysis for the Appalachian Basin (GPFA-AB). Phase 1 of the GPFA-AB project identified potential Geothermal Play Fairways within the Appalachian basin of Pennsylvania, West Virginia and New York. This was accomplished through analysis of 4 key criteria: thermal quality, natural reservoir productivity, risk of seismicity, and heat utilization. Each of these analyses represent a distinct project task, with the fifth task encompassing combination of the 4 risks factors. Supporting data for all five tasks has been uploaded into the Geothermal Data Repository node of the National Geothermal Data System (NGDS).

This submission comprises the data for Thermal Quality Analysis (project task 1) and includes all of the necessary shapefiles, rasters, datasets, code, and references to code repositories that were used to create the thermal resource and risk factor maps as part of the GPFA-AB project. The identified Geothermal Play Fairways are also provided with the larger dataset. Figures (.png) are provided as examples of the shapefiles and rasters. The regional standardized 1 square km grid used in the project is also provided as points (cell centers), polygons, and as a raster. Two ArcGIS toolboxes are available: 1) RegionalGridModels.tbx for creating resource and risk factor maps on the standardized grid, and 2) ThermalRiskFactorModels.tbx for use in making the thermal resource maps and cross sections. These toolboxes contain item description documentation for each model within the toolbox, and for the toolbox itself. This submission also contains three R scripts: 1) AddNewSeisFields.R to add seismic risk data to attribute tables of seismic risk, 2) StratifiedKrigingInterpolation.R for the interpolations used in the thermal resource analysis, and 3) LeaveOneOutCrossValidation.R for the cross validations used in the thermal interpolations.

Some file descriptions make reference to various 'memos'. These are contained within the final report submitted October 16, 2015.

Each zipped file in the submission contains an 'about' document describing the full Thermal Quality Analysis content available, along with key sources, authors, citation, use guidelines, and assumptions, with the specific file(s) contained within the .zip file highlighted.

UPDATE: Newer version of the Thermal Quality Analysis has been added here: (Also linked below) Newer version of the Combined Risk Factor Analysis has been added here: (Also linked below) This .zip file contains 5 Microsoft Excel workbooks, one with macros enabled: All_States_BHT_HeatFlow_Raw_Combined.xlsm, AASG_Combined.xlsx, AASG_Processed.xlsx, AASG_Thermed.xlsx, and AASG_Thermed_AllThicksAndConds.xlsx.

The raw data in these databases was pulled from the American Association of State Geologists (AASG), in association with the National Geothermal Data System (NGDS). A unique identifier called StateID is common in all of these databases, and it may be used to join the databases together, and also back to the original data (the Raw file).

These data have been processed and interpreted as part of the Thermal Quality Analysis task. Processing details, and file and field name definitions for these databases may be found 8_GPFA-AB_ThermalModelMethods.pdf (Smith and Horowitz, 2015), which was provided within the final report for this project.

The only difference between the database entitled AASG_Thermed.xlsx and AASG_Thermed_AllThicksAndConds.xlsx is that the latter has columns for the formation thicknesses (Layer) and thermal conductivities (Cond) corresponding to each thickness for each well. There are also columns for the temperature at 10 m (T0) to 5000 m (T499) in 10 m increments.

Note that some records in AASG_Thermed.xlsx and AASG_Thermed_AllThicksAndConds.xlsx have -9999 in the Depth50C, Depth80C, and Depth100C. This is because the maximum depth for these fields was 20000 m, and for these records one would have to go deeper than 20000 m to reach 50 deg C, 80 deg C, or 100 deg C. The calculation of the geotherm and surface heat flow for these wells was done using the code repository developed by Smith, Horowitz, and Whealton (2015) and described in 8_GPFA-AB_ThermalModelMethods.pdf (Smith and Horowitz, 2015).

Data and Resources

Metadata Source

Additional Info

Field Value
Citation Date 2015-09-30T00:00:00-06:00

Harvest Information

Original ID f0000002-58cc-4372-a567-000000000638
Index Date 2020-01-13T10:59:50-07:00
Original Format ISO-USGIN
Original Version 1.2


Name Teresa E. Jordan
Position primary contact
Organization Cornell University

Geographic Extent

North Bound 43.5
South Bound 37
East Bound -74.5
West Bound -82.5