Identification Information:
Citation:
Citation Information:
Originator: Alberta Energy Regulator
Originator: Alberta Geological Survey
Originator: Brinsky, J.
Publication Date: 2023
Title:
Distribution of Hydraulic Head in the Leduc Hydrostratigraphic Unit (tabular data, tab-delimited format)
Geospatial Data Presentation Form: tabular digital data
Series Information:
Series Name: Digital Data
Issue Identification: DIG 2021-0028
Publication Information:
Publication Place: Edmonton, Alberta, Canada
Publisher: Alberta Geological Survey
Online Linkage: https://ags.aer.ca/document/DIG/DIG_2021_0028.zip
Description:
Abstract:

This data release contains hydraulic head data used to create a hydraulic head map of the Leduc hydrostratigraphic unit (HSU). The data were acquired from publicly available pressure data from drillstem tests from oil and gas wells.

Data have been processed, relevant records selected, and outliers removed to compile this dataset.

Purpose: For computer display, query, and modelling of hydraulic head distribution for the Leduc HSU.
Supplemental Information: Language: In English.
Time Period of Content:
Time Period Information:
Range of Dates/Times:
Beginning Date: 1951
Ending Date: 2001
Currentness Reference: ground condition
Status:
Progress: Complete
Maintenance and Update Frequency: None planned
Spatial Domain:
Bounding Coordinates:
West Bounding Coordinate: -120
East Bounding Coordinate: -110
North Bounding Coordinate: 57.5
South Bounding Coordinate: 49
Keywords:
Theme:
Theme Keyword Thesaurus: none
Theme Keyword: data
Theme Keyword: drillstem test
Theme Keyword: geology
Theme Keyword: groundwater
Theme Keyword: hydraulic head
Theme Keyword: hydrogeology
Theme Keyword: leduc formation
Theme Keyword: potentiometric surface
Place:
Place Keyword Thesaurus: none
Place Keyword: 72e
Place Keyword: 72l
Place Keyword: 72m
Place Keyword: 73d
Place Keyword: 73e
Place Keyword: 73l
Place Keyword: 73m
Place Keyword: 74d
Place Keyword: 74e
Place Keyword: 82g
Place Keyword: 82h
Place Keyword: 82i
Place Keyword: 82j
Place Keyword: 82n
Place Keyword: 82o
Place Keyword: 82p
Place Keyword: 83a
Place Keyword: 83b
Place Keyword: 83c
Place Keyword: 83d
Place Keyword: 83e
Place Keyword: 83f
Place Keyword: 83g
Place Keyword: 83h
Place Keyword: 83i
Place Keyword: 83j
Place Keyword: 83k
Place Keyword: 83l
Place Keyword: 83m
Place Keyword: 83n
Place Keyword: 83o
Place Keyword: 83p
Place Keyword: 84a
Place Keyword: 84b
Place Keyword: 84c
Place Keyword: 84d
Place Keyword: 84e
Place Keyword: 84f
Place Keyword: 84g
Place Keyword: 84h
Place Keyword: alberta
Place Keyword: canada
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: 4th 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: Brinsky, J.
Publication Date: 2023
Title: Distribution of Hydraulic Head in the Leduc Hydrostratigraphic Unit (gridded data, ASCII format)
Geospatial Data Presentation Form: raster digital data
Series Information:
Series Name: Digital Data
Issue Identification: DIG 2022-0029
Publication Information:
Publication Place: Edmonton, Alberta, Canada
Publisher: Alberta Geological Survey
Online Linkage: https://ags.aer.ca
Cross Reference:
Citation Information:
Originator: Alberta Energy Regulator
Originator: Alberta Geological Survey
Originator: Brinsky, J.
Publication Date: 2023
Title: Distribution of Hydraulic Head in the Leduc Hydrostratigraphic Unit
Geospatial Data Presentation Form: map
Series Information:
Series Name: Map
Issue Identification: MAP 631
Publication Information:
Publication Place: Edmonton, Alberta, Canada
Publisher: Alberta Geological Survey
Other Citation Details: ISBN:978-1-4601-5363-5 Scale: 1: 3 000 000
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 were undertaken.
Logical Consistency Report:
Drillstem test data have been collected over decades, by different parties, and using different methods. There may be more than one record for a Source_ID if the well was sampled more than once. This will be reflected in the Source_ID being duplicated. Geographic coordinates (latitude/longitude) may be the same for different wells, because wells could have been recompleted and the HSU resampled.
Completeness Report:
All data records within the Leduc HSU with sufficient hydraulic head information were selected from the oil and gas well data.
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 tested interval is a calculated value and its accuracy is dependent on the accuracy of the measured depths and elevations provided from the well header. For oil and gas wells, the well elevations and locations are surveyed, so accuracy will be to the same significant digits provided by the source, even though there may be considerable uncertainty as to the exact depth of the pressure measurement. The location of the DST intervals 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
Publication Information:
Publication Place: Calgary, Alberta, Canada
Publisher: Alberta Energy Regulator
Online Linkage: Not available online.
Source Scale Denominator: 0
Type of Source Media: database
Source Time Period of Content:
Time Period Information:
Range of Dates/Times:
Beginning Date: 1900
Ending Date: 2021
Source Currentness Reference: recorded drilling dates
Source Citation Abbreviation: DST
Source Contribution: DST from oil and gas
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 Leduc HSU based on the depth information of the tested interval;

4. DSTs from intervals straddling the top or bottom of the Leduc HSU 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 HSU, but not into any other formation. In addition, DSTs that straddled the contact with the Ireton Formation in areas of Leduc reef buildups were used.

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 more thoroughly examined manually during the mapping process based on the following conditions:

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

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

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

4) Substantial gas flow or significant oil recovery

Pressure data were converted to equivalent freshwater hydraulic heads using the relationship: Hydraulic Head= Completion Mid Point Elevation + Pressure / ρg, where ρ = fluid density (1000 kg/m3 for freshwater), g = gravitational acceleration (9.81 m/s2), pressure is measured in kPa (kg/ms2), and hydraulic head and mid point elevation are measured in metres above sea level (masl).

DSTs were also analyzed to determine if nearby production or injection had influenced the pressures. To identify these influences, the CII methodology from Singh et al. (2017) was used with production and injection data from the Leduc and adjacent formations. At the regional scale, production and injection influences were not noted. More information on the CII methodology can be found in:

Singh, A., Palombi, D., Nakevska, N., Jensen, G. and Rostron, B. (2017): An efficient approach for characterizing basin-scale hydrodynamics; Marine and Petroleum Geology, v. 84, p. 332-340, http://dx.doi.org/10.1016/j.marpetgeo.2017.02.015.

This dataset includes only those wells that were used in the production of the final potentiometric 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, Saskatchewan 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: 2018
Entity and Attribute Information:
Detailed Description:
Entity Type:
Entity Type Label: DIG 2021-0028
Entity Type Definition:
This dataset contains a compilation of hydraulic head data used to create potentiometric surfaces for the Leduc hydrostratigraphic unit (HSU).
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 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: DataSrc
Attribute Definition Source: Alberta Geological Survey
Attribute Definition:
Source of the data: AWWID = Alberta Environment and Parks Water Well Information Database, or OGW = oil and gas wells.
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 screened interval for water wells and midpoint elevation of tested or completed interval for oil & gas wells.
Attribute:
Attribute Label: HydrHd_m28
Attribute Definition Source: Alberta Geological Survey
Attribute Definition:
Equivalent fresh water hydraulic (piezometric) head, in metres above sea level, Canadian Geodetic Vertical Datum of 1928.
Attribute:
Attribute Label: Residual_m
Attribute Definition Source: Alberta Geological Survey
Attribute Definition:
Calculated difference, in metres, between the modelled distribution of hydraulic head and measured values from 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: 4th 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: 20230120
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: 4th 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