AGS_Information:

  Identification_Information:

    Citation:

      Citation_Information:

        Originator: Alberta Energy Regulator

        Originator: Alberta Geological Survey

        Originator: Nakevska, N.

        Publication_Date: 2026

        Title: Distribution of Hydraulic Head 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 2025-0014

        Publication_Information:

          Publication_Place: Edmonton, Alberta, Canada

          Publisher: Alberta Geological Survey

        Online_Linkage: https://ags.aer.ca/publications/all-publications/dig-2025-0014

    Description:

      Abstract: This dataset contains hydraulic head data used to map the distribution of hydraulic head in the Granite Wash in Alberta. Hydraulic head values were calculated from pressure data from oil and gas well drillstem tests using a reference formation water density of 1.117 g/cm³, representative of formation waters in the Gilwood Member (Watt Mountain Formation) and Granite Wash.

      Purpose: To provide a dataset for computer display, query and modelling of the hydraulic head distribution in the Granite Wash in Alberta.

      Supplemental_Information: Language: In English.

    Time_Period_of_Content:

      Time Period Information:

    Currentness_Reference: publication date

  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: drillstem test

      Theme_Keyword: granite wash

      Theme_Keyword: groundwater

      Theme_Keyword: hydraulic head

      Theme_Keyword: hydrogeology

      Theme_Keyword: potentiometric surface

      Theme_Keyword: tabular data

    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 Hydraulic Head 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 2025-0015

      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: Any errors in the original data were carried into this dataset and no systematic checking of attributes from original data sources was undertaken.

  Logical_Consistency_Report: Drillstem test data have been collected over decades, by different parties, and using different methods.

  Completeness_Report: All data records within the Granite Wash 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 also a calculated value and its accuracy is dependent on the accuracy of the measured depths and elevations provided in the well header.

The location of the DST intervals in oil and gas wells may be accurate to within millimeters 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 database

          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: pressure data

    Process_Step:

   Process_Description: Process steps for selection of pressure data from DSTs: 1. Records containing depth of tested interval, recovery information, and recovered water were selected.

2. The tested interval was constrained to less than or equal to 50 m.

3. DSTs were allocated to the Granite Wash based on the depth information of the tested interval.

4. DSTs from 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 Granite Wash, but not into any other formation.

5. DST pressure values were considered potentially valid if there was evidence of a mechanically sound test (no misruns), pressures had stabilized or were close to stabilization (tests must have Pmax), and flow and shut-in times were reported.

DSTs were individually examined to remove any remaining non-representative fluid pressures. Outliers were manually removed during the mapping process based on the following conditions:

a) Final shut-in and final flow times less than 30 minutes

b) Final shut-in time less than the final flow time

c) Difference between final and initial shut-in pressures was more than 25% (may be indicative of supercharging)

d) Substantial gas flow or significant oil recovery

6. Hydraulic head values were calculated from pressure data using a reference formation water density of 1.117 g/cm³, representative of Gilwood and Granite Wash formation waters.

This dataset includes only those wells that were used in the production of final potentiometric surfaces. 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 2025-0014

Entity_Type_Definition: This dataset contains a compilation of hydraulic head data used to create potentiometric surfaces for 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: Location 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: HydrHd_m28

Attribute_Definition_Source: Alberta Geological Survey

Attribute_Definition: Hydraulic (piezometric) head in metres above sea level, estimated using reference formation water density. Canadian Geodetic Vertical Datum of 1928.

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