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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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:
Reference system identifier:
RS Identifier:
Code:
EPSG:4269
Code Space:
http://www.epsg-registry.org/
Version:
8.4.1
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xlink: https://www.ngdc.noaa.gov/docucomp/65f8b220-95ed-11e0-aa80-0800200c9a66 title: North American Datum 1983
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xlink: https://www.ngdc.noaa.gov/docucomp/c3895520-95ed-11e0-aa80-0800200c9a66 title: Geodetic Reference System 1980
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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:
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Keyword:
74l
Keyword:
74m
Keyword:
82g
Keyword:
82h
Keyword:
82i
Keyword:
82j
Keyword:
82n
Keyword:
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Keyword:
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Keyword:
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Keyword:
83b
Keyword:
83c
Keyword:
83d
Keyword:
83e
Keyword:
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Keyword:
83g
Keyword:
83h
Keyword:
83i
Keyword:
83j
Keyword:
83k
Keyword:
83l
Keyword:
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Keyword:
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Keyword:
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Keyword:
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Keyword:
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Keyword:
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Keyword:
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Keyword:
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Keyword:
84e
Keyword:
84f
Keyword:
84g
Keyword:
84h
Keyword:
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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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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:
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:
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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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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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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