  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
