Abstract: This digital dataset is the compilation of an analysis of the in situ stress regime in several regions of Alberta and northeastern British Columbia conducted by Dr. Sebastian Bell under a contract with the Alberta Geological Survey from 1999 to 2004. The dataset includes both new and previously published estimates for vertical stress gradients, minimum horizontal stress gradients, and stress orientation. Understanding the state of stress in the subsurface has always been important in the development of energy resources. The recent development of unconventional oil sand and low permeability hydrocarbon deposits, waste fluid disposal, greenhouse gas sequestration, and potential geothermal energy extraction all require knowledge of the state of stress to operate safely and economically. A lack of understanding of the state of stress in a given project area has the potential to negatively affect the economics of such projects and may expose operators to increased liabilities. Regional-scale studies of the stress regime indicate that in southern and central Alberta the vertical stress (Sv) is the largest principal stress. The Sv magnitude is determined from the overburdened load and is calculated by integrating the bulk density log from ground surface to the depth of interest. This dataset contains 724 vertical stress gradient measurements from 126 wells in Alberta. The minimum horizontal stress (Shmin) can be evaluated using a variety of tests. While leak-off tests and fracture breakdown pressures have been used in the past for estimating the magnitude of the Shmin, mini-fracture tests (also known as DFITS) are currently considered a more accurate and consistent method. This dataset includes only mini-fracture test data, consisting of 106 minimum horizontal stress gradient measurements in 83 wells. Alberta was one of the first regions in the world where stress mapping began, originating in the pioneering ‘borehole breakout’ developments of Dr. Bell from the Geological Survey of Canada in Calgary and Dr. Gough from the University of Alberta. The Shmin orientations can be determined from borehole breakouts, which are spalled cavities that occur on opposite walls of a borehole. This dataset contains 214 stress orientation measurements from 133 wells.
Metadata: 
  File identifier: 
      DIG_2016_0040.xml
  Language: 
      eng; CAN
  Character set: 
    Character set code: 
      utf8
  Hierarchy level: 
    Scope code: 
      dataset
  Metadata author: 
    Responsible party: 
      Organisation name: 
          Alberta Geological Survey
      Position name: 
          AGS Information Manager
      Contact info: 
        Contact: 
          Phone: 
            Telephone: 
              Voice: 
                  (780) 638-4491
              Facsimile: 
                  (780) 422-1459
          Address: 
            Address: 
              Delivery point: 
                  Alberta Energy Regulator
              Delivery point: 
                  4th Floor, Twin Atria Building
              Delivery point: 
                  4999-98 Avenue NW
              City: 
                  Edmonton
              Administrative area: 
                  Alberta
              Postal code: 
                  T6B 2X3
              Country: 
                  Canada
              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.
      Role: 
        Role code: 
          pointOfContact
  Date stamp: 

      2016-08-09
  Metadata standard name: 
      North American Profile of ISO 19115:2003 - Geographic information - Metadata (NAP-Metadata)
  Metadata standard version: 
      ISO 19115-1.1
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Spatial representation info:

Grid spatial representation: Number of dimensions: 2 Axis Dimension Properties: Dimension: Dimension name: Dimension name type code: column Dimension size: unknown Resolution: uom: decimalDegrees 0.000000 Axis Dimension Properties: Dimension: Dimension name: Dimension name type code: row Dimension size: unknown Resolution: uom: decimalDegrees 0.000000 Cell geometry: Cell geometry code: Transformation parameter availability: false
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Reference system info:

Reference system: Reference system identifier: RS Identifier: Code: EPSG:4269 Code Space: http://www.epsg-registry.org/ Version: 8.4.1
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Reference system info:

xlink: https://www.ngdc.noaa.gov/docucomp/65f8b220-95ed-11e0-aa80-0800200c9a66 title: North American Datum 1983
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Reference system info:

xlink: https://www.ngdc.noaa.gov/docucomp/c3895520-95ed-11e0-aa80-0800200c9a66 title: Geodetic Reference System 1980
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Identification info:

Data identification: Citation: Citation: Title: Compilation of In Situ Stress Data from Alberta and Northeastern British Columbia (tabular data, tab delimited) Date: Date: Date: 2016-08-01 Date type: Date type code: publication Cited responsible party: Responsible party: Organisation name: Alberta Energy Regulator Role: Role code: originator Cited responsible party: Responsible party: Organisation name: Alberta Geological Survey Role: Role code: originator Cited responsible party: Responsible party: Organisation name: Haug, K. Role: Role code: originator Cited responsible party: Responsible party: Organisation name: Bell, J.S. Role: Role code: originator Cited responsible party: Responsible party: Organisation name: Alberta Geological Survey Contact info: Contact: Address: Address: City: Edmonton Administrative area: Alberta, Canada Role: Role code: publisher Presentation form: Presentation form code: tableDigital Series: Series: Name: Digital Data Issue identification: DIG 2016-0040 Abstract: This digital dataset is the compilation of an analysis of the in situ stress regime in several regions of Alberta and northeastern British Columbia conducted by Dr. Sebastian Bell under a contract with the Alberta Geological Survey from 1999 to 2004. The dataset includes both new and previously published estimates for vertical stress gradients, minimum horizontal stress gradients, and stress orientation. Understanding the state of stress in the subsurface has always been important in the development of energy resources. The recent development of unconventional oil sand and low permeability hydrocarbon deposits, waste fluid disposal, greenhouse gas sequestration, and potential geothermal energy extraction all require knowledge of the state of stress to operate safely and economically. A lack of understanding of the state of stress in a given project area has the potential to negatively affect the economics of such projects and may expose operators to increased liabilities. Regional-scale studies of the stress regime indicate that in southern and central Alberta the vertical stress (Sv) is the largest principal stress. The Sv magnitude is determined from the overburdened load and is calculated by integrating the bulk density log from ground surface to the depth of interest. This dataset contains 724 vertical stress gradient measurements from 126 wells in Alberta. The minimum horizontal stress (Shmin) can be evaluated using a variety of tests. While leak-off tests and fracture breakdown pressures have been used in the past for estimating the magnitude of the Shmin, mini-fracture tests (also known as DFITS) are currently considered a more accurate and consistent method. This dataset includes only mini-fracture test data, consisting of 106 minimum horizontal stress gradient measurements in 83 wells. Alberta was one of the first regions in the world where stress mapping began, originating in the pioneering ‘borehole breakout’ developments of Dr. Bell from the Geological Survey of Canada in Calgary and Dr. Gough from the University of Alberta. The Shmin orientations can be determined from borehole breakouts, which are spalled cavities that occur on opposite walls of a borehole. This dataset contains 214 stress orientation measurements from 133 wells. Purpose: The purpose of this dataset is to release the in situ stress data submitted to the AGS by Dr. Sebastian Bell between 1999 and 2004. Status: Progress code: completed Point of contact: Responsible party: Organisation name: Alberta Geological Survey Position name: AGS Information Manager Contact info: Contact: Phone: Telephone: Voice: (780) 638-4491 Facsimile: (780) 422-1459 Address: Address: Delivery point: Alberta Energy Regulator Delivery point: 4th Floor, Twin Atria Building Delivery point: 4999-98 Avenue NW City: Edmonton Administrative area: Alberta Postal code: T6B 2X3 Country: Canada 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. Role: Role code: pointOfContact Resource maintenance: Maintenance information: Maintenance and update frequency: Maintenance frequency code: notPlanned Descriptive keywords: Keywords: Keyword: geology Keyword: horizontal stresses Keyword: minifrac Keyword: stress orientation Keyword: stresses Keyword: vertical gradient Keyword: vertical stresses Type: Keyword type code: theme Thesaurus name: Citation: Title: none Date: unknown Descriptive keywords: Keywords: Keyword: 72e Keyword: 72l Keyword: 72m Keyword: 73d Keyword: 73e Keyword: 73l Keyword: 73m Keyword: 74d Keyword: 74e Keyword: 74l Keyword: 74m Keyword: 82g Keyword: 82h Keyword: 82i Keyword: 82j Keyword: 82n Keyword: 82o Keyword: 82p Keyword: 83a Keyword: 83b Keyword: 83c Keyword: 83d Keyword: 83e Keyword: 83f Keyword: 83g Keyword: 83h Keyword: 83i Keyword: 83j Keyword: 83k Keyword: 83l Keyword: 83m Keyword: 83n Keyword: 83o Keyword: 83p Keyword: 84a Keyword: 84b Keyword: 84c Keyword: 84d Keyword: 84e Keyword: 84f Keyword: 84g Keyword: 84h Keyword: 84i Keyword: 84j Keyword: 84k Keyword: 84l Keyword: 84m Keyword: 84n Keyword: 84o Keyword: 84p Keyword: alberta Keyword: british columbia Keyword: canada Type: Keyword type code: place Thesaurus name: Citation: Title: none Date: unknown Resource constraints: Legal constraints: Access constraints: Restriction code: otherRestrictions Use constraints: Restriction code: otherRestrictions Other constraints: 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. 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. Language: eng; CAN Topic category: Topic category code: geoscientificInformation Extent: Extent: Geographic element: Geographic bounding box: West bound longitude: -123.788261 East bound longitude: -110.198779 South bound latitude: 49.013335 North bound latitude: 59.803722 Temporal element: Temporal extent: Extent: Time period: Description: compilation date Begin date: 2015-09-15 End date: 2016-06-30 Supplemental Information: Language: In English;
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Content info:

Feature catalogue description: Included with dataset: false Feature catalogue citation: Citation: Title: Entity and Attribute Information Date: Other citation details: Detailed Entity and Attribute information is provided with the dataset, formatted as Federal Geographic Data Committee (FGDC) Content Standard for Digital Geospatial Metadata.
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DISTRIBUTION INFO:

Distribution: Distributor: Distributor: Distributor contact: Responsible party: Organisation name: Alberta Geological Survey Position name: AGS Information Manager Contact info: Contact: Phone: Telephone: Voice: (780) 638-4491 Facsimile: (780) 422-1459 Address: Address: Delivery point: Alberta Energy Regulator Delivery point: 4th Floor, Twin Atria Building Delivery point: 4999-98 Avenue NW City: Edmonton Administrative area: Alberta Postal code: T6B 2X3 Country: Canada 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. Role: Role code: distributor Transfer options: Digital transfer options: Online: Online Resource: Linkage: URL: https://static.ags.aer.ca/files/document/DIG/DIG_2016_0040.zip Name: Tabular Data
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Data quality info:

Data quality: Scope: Scope: Hierarchy level: Scope code: dataset Report: Completeness commission: Result: unknown Report: Completeness omission: Evaluation method description: The dataset includes 214 records of stress orientation data, 106 records of horizontal stress gradient data, and 724 records of vertical stress gradient data from data submitted to AGS by Dr. Bell as part of a project to assess the feasibility of sequestering carbon dioxide in the subsurface. Result: unknown Report: Conceptual consistency: Measure description: The Unique Well Identifiers (UWI) in these files may not be unique, but combined with a value for horizontal stress gradient, vertical stress gradient or stress orientation make each record unique, per file. This ensures that there is no duplicate data across all fields. In some cases not all fields will have values. In the Orientations file some records may not contain values for Breakout Top, Breakout Base, thicknesses, or standard deviation. This is due to the lack of that data in the source material. Geological unit assignments of stress gradient data are as received from Dr. Bell and have not been confirmed by an AGS geologist. Result: unknown Lineage: Lineage: Statement: The dataset includes 214 records of stress orientation data, 106 records of horizontal stress gradient data, and 724 records of vertical stress gradient data from data submitted to AGS by Dr. Bell as part of a project to assess the feasibility of sequestering carbon dioxide in the subsurface. Process step: Process step: Description: A publication review was done to identify Alberta in situ stress data that had been previously published. These data were compiled and compared to the data from Dr. Bell in the AGS Stress Database. 1. Compile previously published stress data into spreadsheets. 2. Match the UWI (if present) in the spreadsheets to those in the AGS Wells Database to obtain Site_IDs 3. Linking on Site_ID, match up the wells from the publications to the AGS Stress Database and compare the stress values to identify which data were unpublished, and for published data, whether the values are greater than or less than 10% different from the values in the AGS Stress Database. 4. Create a table for each type of stress data, minimum horizontal stress gradient, vertical stress gradient and minimum horizontal stress orientation, containing only the fields that will be published. 5. Create and populate a publication code table which identifies if the data was found in a publication, and whether published data values are greater than or less than 10% different from AGS' data. 6. Export the four data tables to tab delimited text files for publication. Date and time: 2015-01-01T00:00:00
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Metadata constraints:

Legal constraints: Access constraints: Restriction code: otherRestrictions Use constraints: Restriction code: otherRestrictions Other constraints: Metadata Access Constraints: none Metadata Use Constraints: none
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Metadata maintenance:

Maintenance information: Maintenance and update frequency: unknown Maintenance note: This metadata was automatically generated from the FGDC Content Standard for Digital Geospatial Metadatastandard version FGDC-STD-001-1998 using the January 2013 version of the FGDC CSDGM to ISO 19115-2 transform. Metadata author: Responsible party: Organisation name: Alberta Geological Survey Position name: AGS Information Manager Contact info: Contact: Phone: Telephone: Voice: (780) 638-4491 Facsimile: (780) 422-1459 Address: Address: Delivery point: Alberta Energy Regulator Delivery point: 4th Floor, Twin Atria Building Delivery point: 4999-98 Avenue NW City: Edmonton Administrative area: Alberta Postal code: T6B 2X3 Country: Canada 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. Role: Role code: custodian
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