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 Gilwood Member (Watt Mountain Formation) in Alberta (tabular data, tab-delimited format)

        Geospatial_Data_Presentation_Form: tabular digital data

        Series_Information:

          Series_Name: Digital Data

          Issue_Identification: DIG 2025-0013

        Publication_Information:

          Publication_Place: Edmonton, Alberta, Canada

          Publisher: Alberta Geological Survey

        Online_Linkage: https://ags.aer.ca/publications/all-publications/dig-2025-0013

    Description:

      Abstract: This dataset contains water chemistry data used to map the distribution of total dissolved solids in the Gilwood Member (Watt Mountain Formation) 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 Gilwood Member (Watt Mountain Formation) 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: -119.7886

      East_Bounding_Coordinate: -114.0572

      North_Bounding_Coordinate: 57.6636

      South_Bounding_Coordinate: 53.7868

  Keywords:

    Theme:

      Theme_Keyword_Thesaurus: ISO 19115 Topic Category

      Theme_Keyword: formation waters

      Theme_Keyword: gilwood member

      Theme_Keyword: hydrogeology

      Theme_Keyword: tabular data

      Theme_Keyword: total dissolved solids

    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 Gilwood Member (Watt Mountain Formation) in Alberta(gridded data, ASCII format)

      Geospatial_Data_Presentation_Form: raster digital data

      Series_Information:

        Series_Name: Digital Data

        Issue_Identification: DIG 2025-0019

      Publication_Information:

        Publication_Place: Edmonton, Alberta, Canada

        Publisher: Alberta Geological Survey

      Online_Linkage: https://ags.aer.ca

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 Gilwood Member (Watt Mountain Formation) 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: CIT Oil and gas well data from AER corporate databaseOil and gas well data from AER

          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 Watt Mountain Formation based on the depth information for the tested interval; 6. Records with tested intervals straddling the top or bottom of the Watt Mountain Formation 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 Gilwood Member, 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 2025-0013

Entity_Type_Definition: This dataset contains a compilation of total dissolved solids data used to map the distribution of total dissolved solids in the Gilwood Member of the Watt Mountain Formation in Alberta.

Attribute:

Attribute_Label: Source_ID

Attribute_Definition_Source: Alberta Geological Survey

Attribute_Definition: Well identifier from the source data. For oil and gas wells (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