  Identification_Information
    Citation
      Citation_Information
        Originator: Alberta Energy Regulator
        Originator: Alberta Geological Survey
        Originator: Nakevska, N.
        Publication_Date: 2026
        Title: Distribution of Total Dissolved Solids in the Granite Wash in Alberta (tabular data, tab-delimited format)
        Geospatial_Data_Presentation_Form: tabular digital data
        Series_Information
          Series_Name: Digital Data
          Issue_Identification: DIG 2025-0017
        Publication_Information
          Publication_Place: Edmonton, Alberta, Canada
          Publisher: Alberta Geological Survey
        Online_Linkage: https://ags.aer.ca/publications/all-publications/dig-2025-0017
    Description
      Abstract: This dataset contains water chemistry data used to map the distribution of total dissolved solids in the Granite Wash in Alberta. The data were derived from formation water chemistry data from oil and gas well drillstem tests. Data have been processed, relevant records selected, and outliers removed to compile this dataset.
      Purpose: To provide a dataset for computer display, query, and modelling of the distribution of total dissolved solids in the Granite Wash in Alberta.
      Supplemental_Information: Language: In English;
    Time_Period_of_Content
      Time Period Information
        Single Date/Time
          Calendar_Date: 2010
    Currentness_Reference: ground condition
  Status
    Progress: Complete
    Maintenance_and_Update_Frequency: None planned
  Spatial Domain
    Bounding Coordinates
      West_Bounding_Coordinate: -118.90848
      East_Bounding_Coordinate: -114.32263
      North_Bounding_Coordinate: 57.53896
      South_Bounding_Coordinate: 55.17721
  Keywords
    Theme
      Theme_Keyword_Thesaurus: ISO 19115 Topic Category
      Theme_Keyword: formation waters
      Theme_Keyword: granite wash
      Theme_Keyword: hydrogeology
      Theme_Keyword: tabular data
      Theme_Keyword: total dissolved solids
      Theme_Keyword: water chemistry
    Place
      Place_Keyword_Thesaurus: ISO 19115 Topic Category
      Place_Keyword: alberta
      Place_Keyword: canada
      Place_Keyword: northwestern alberta
      Place_Keyword: west-central alberta
      Place_Keyword: western canada sedimentary basin
  Access_Constraints: Public
  Use_Constraints: Acknowledgement of the Alberta Energy Regulator / Alberta Geological Survey as the originator/source of this information is required as described in the Open Government License - Alberta.
  Point_of_Contact
    Contact_Information
      Contact_Organization_Primary
        Contact_Organization: Alberta Geological Survey
        Contact_Person: AGS Information Manager
      Contact_Position: AGS Information Manager
      Contact_Address
        Address_Type: mailing and physical
        Address: Alberta Energy Regulator
        Address: 2nd Floor, Twin Atria Building
        Address: 4999-98 Avenue NW
        City: Edmonton
        State_or_Province: Alberta
        Postal_Code: T6B 2X3
        Country: Canada
      Contact_Voice_Telephone: (780) 638-4491
      Contact_Facsimile_Telephone: (780) 422-1459
      Contact_Electronic_Mail_Address: AGS-Info@aer.ca
      Hours_of_Service: 8:00 a.m. to 12:00 p.m. and 1:00 p.m. to 4:30 p.m.
  Cross_Reference
    Citation_Information
      Originator: Alberta Energy Regulator
      Originator: Alberta Geological Survey
      Originator: Nakevska, N.
      Publication_Date: 2025
      Title: Distribution of Total Dissolved Solids in the Granite Wash in Alberta (gridded data, ASCII format)
      Geospatial_Data_Presentation_Form: raster digital data
      Series_Information
        Series_Name: Digital Data
        Issue_Identification: DIG 2025-0018
      Publication_Information
        Publication_Place: Edmonton, Alberta, Canada
        Publisher: Alberta Geological Survey
      Online_Linkage: https://ags.aer.ca/publications/all-publications/dig-2025-0018
Data_Quality_Information
  Attribute_Accuracy
    Attribute_Accuracy_Report: All attributes in this dataset are as received from the data source. The total dissolved solids (TDS) values are calculated from other fields and do not contain any decimal places. Calculation of TDS is dependent on the availability of specific ions at the time of testing and the generally accepted standard for displaying TDS is a whole number.
  Logical_Consistency_Report: Water chemistry data used in this dataset have been collected over decades, by different parties, and using different methods.
  Completeness_Report: All data records within the Granite Wash unit with sufficient information were selected from described sources. Null values are reported as -9999.
  Positional_Accuracy
    Horizontal_Positional_Accuracy
   Horizontal_Positional_Accuracy_Report: The locations of the oil and gas wells may be accurate to within millimetres depending on surveying standards at the time of drilling.
    Vertical_Positional_Accuracy
   Vertical_Positional_Accuracy_Report: The mid-point of the sampled interval is a calculated value and its accuracy is dependent on the accuracy of the measured depths and elevations provided in the well header. For oil and gas wells, the well elevations and locations are surveyed in, so accuracy will be to the same significant digits provided by the source, even though there may be considerable uncertainty as to where the sample actually came from. The location of the sampled interval in oil and gas wells may be accurate to within millimetres in accordance with surveying standards at the time of drilling.
  Lineage
    Source_Information
      Source_Citation
        Citation_Information
          Originator: Alberta Energy Regulator
          Originator: Energy Resources Conservation Board
          Originator: Alberta Energy and Utilities Board
          Publication_Date: 
          Title: Oil and gas well data from AER corporate database
          Geospatial_Data_Presentation_Form: database
          Series_Information
            Series_Name: Non-AGS Data Source
            Issue_Identification: OGW
          Publication_Information
            Publication_Place: Calgary, Alberta, Canada
            Publisher: Alberta Energy Regulator
          Online_Linkage: Not available online.
   Source_Scale_Denominator: 
   Type_of_Source_Media: online
        Source Time Period of Content
          Time Period Information
            Single Date/Time
       Calendar_Date: 
     Source_Currentness_Reference: publication date
     Source_Citation_Abbreviation: OGW
     Source_Contribution: Formation water chemistry data
    Process_Step
   Process_Description: Process steps for selection of formation water analyses from oil and gas wells:
1. Records containing depth of tested interval information were selected;
2. The tested interval length was constrained to less than or equal to 50 m;
3. The acceptable charge balance error was constrained to ±10%;
4. Samples labelled as “incomplete analysis" were excluded;
5. Records were allocated to the Granite Wash based on the depth information for the tested interval;
6. Records with tested intervals straddling the top or bottom of the Granite Wash were excluded, unless they were from wells in data-poor areas and it was verified that less than 30% of the tested interval extended into the formation directly above or below the unit, but not into any other formation;
7. In case of collocated data, the most representative sample was selected, or averaging of TDS values was done;
8. The concentration of total dissolved solids (TDS) was determined either by summing the concentration of major constituents (if available), or by using the TDS values as reported in the source dataset (if major constituents were not available).
The remaining formation water analyses were subjected to additional screening to identify potential contamination of the formation water by drilling fluids such as acid water, corrosion inhibitors, mud filtrates, and alcohols.
The final dataset includes only those records that were used in the production of the final TDS surface.
Details about the screening process can be found in the following reference: Jensen, G.K.S., Rostron, B., Palombi, D., and Melnik, A. (2013): Saskatchewan Phanerozoic Fluids and Petroleum Systems project: hydrogeological mapping framework; in Summary of investigations 2013, Volume 1, Saskatchewan Geological Survey, Sask. Ministry of the Economy, Misc. Rep. 2013-4.1, Paper A5, 10 p. URL http://publications.gov.sk.ca/details.cfm?p=80100 [October 2014].
   Process_Date: 2025
  Data_Quality_Information: 
Spatial_Data_Organization_Information: 
Spatial_Reference_Information: 
Entity_and_Attribute_Information: Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: DIG 2025-0017
Entity_Type_Definition: This dataset contains a compilation of total dissolved solids data used to map the distribution of total dissolved solids in the Granite Wash in Alberta.
Entity_Type_Definition_Source: Alberta Geological Survey

Attribute:
Attribute_Label: Source_ID
Attribute_Definition_Source: Alberta Geological Survey
Attribute_Definition: Well identifier from the source data. For oil and gas well (OGW) data this is the unique well identifier.

Attribute:
Attribute_Label: Lat_NAD83
Attribute_Definition_Source: Alberta Geological Survey
Attribute_Definition: Latitude, NAD83 datum, decimal degrees north.

Attribute:
Attribute_Label: Long_NAD83
Attribute_Definition_Source: Alberta Geological Survey
Attribute_Definition: Longitude, NAD83 datum, decimal degrees east.

Attribute:
Attribute_Label: MidInt_m28
Attribute_Definition_Source: Alberta Geological Survey
Attribute_Definition: Midpoint of tested interval, measured as elevation in metres above sea level, Canadian Geodetic Vertical Datum of 1928. Midpoint
elevation of tested or completed interval for oil and gas wells.

Attribute:
Attribute_Label: TDS_mgL
Attribute_Definition_Source: Alberta Geological Survey
Attribute_Definition: Calculated value for total dissolved solids, in milligrams per litre.

Attribute:
Attribute_Label: DataSrc
Attribute_Definition_Source: Alberta Geological Survey
Attribute_Definition: Source of the data: OGW = oil and gas wells.

Attribute:
Attribute_Label: Publisher
Attribute_Definition_Source: Alberta Geological Survey
Attribute_Definition: Organization that published the dataset.
  Distribution_Information
    Distributor
      Contact_Information
        Contact_Organization_Primary
          Contact_Organization: Alberta Geological Survey
          Contact_Person: AGS Information Manager
        Contact_Position: AGS Information Manager
        Contact_Address
          Address_Type: mailing and physical
          Address: Alberta Energy Regulator
          Address: 2nd Floor, Twin Atria Building
          Address: 4999-98 Avenue NW
          City: Edmonton
          State_or_Province: Alberta
          Postal_Code: T6B 2X3
          Country: Canada
        Contact_Voice_Telephone: (780) 638-4491
        Contact_Facsimile_Telephone: (780) 422-1459
        Contact_Electronic_Mail_Address: AGS-Info@aer.ca
        Hours_of_Service: 8:00 a.m. to 12:00 p.m. and 1:00 p.m. to 4:30 p.m.
Distribution_Liability: The Alberta Energy Regulator / Alberta Geological Survey (AER/AGS) licenses this information under the Open Government License - Alberta. Any references to proprietary software in our documentation, and/or any use of proprietary data formats in our releases, do not constitute endorsement by the AER/AGS of any manufacturer's product.
  Metadata_Reference_Information
    Metadata_Date: 20251128
    Metadata_Contact
      Contact_Information
        Contact_Organization_Primary
          Contact_Organization: Alberta Geological Survey
          Contact_Person: AGS Information Manager
        Contact_Position: AGS Information Manager
        Contact_Address
          Address_Type: mailing and physical
          Address: Alberta Energy Regulator
          Address: 2nd Floor, Twin Atria Building
          Address: 4999-98 Avenue NW
          City: Edmonton
          State_or_Province: Alberta
          Postal_Code: T6B 2X3
          Country: Canada
        Contact_Voice_Telephone: (780) 638-4491
        Contact_Facsimile_Telephone: (780) 422-1459
        Contact_Electronic_Mail_Address: AGS-Info@aer.ca
        Hours_of_Service: 8:00 a.m. to 12:00 p.m. and 1:00 p.m. to 4:30 p.m.
    Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata
    Metadata_Standard_Version: FGDC-STD-001-1998
    Metadata_Time_Convention: local time
    Metadata_Access_Constraints: none
    Metadata_Use_Constraints: none
