Open Data

Modelled Sandiness of the Paskapoo Formation, Alberta (Tabular data, tab-delimited format)

Description

This digital dataset represents the modelled outputs of the three-dimensional distribution of sandiness in the Paskapoo Formation, Alberta, Canada. Sand-abundance values were determined from log analysis of water-well lithologs and petroleum exploration downhole-geophysical logs, specifically gamma-ray logs. We derived the sandiness values by calculating the average sandiness in 25 m thick slices above the base of the Paskapoo Formation in a borehole and by assigning the average value (P50) to the midpoint of each slice interval. Alberta Geological Survey Bulletin 66 provides detailed descriptions of the methodology. We tested the borehole sand-abundance values in a 3-D variogram prior to kriging in a regular block model consisting of cells with dimensions of 1000 m on the x and y planes and 25 m in the z (elevation) direction. Values of modelled sandiness range from 0 (absence of sand) to 1 (100% sand) and are assigned elevations based on two datums: 1) a stratigraphic level corresponding to the height of the midpoint of each respective 25 m thick slice interval above the base of Paskapoo Formation, and 2) the elevation of the midpoint of the slice above sea level. Importing the modelled results of sandiness into model viewing software, such as Voxler, permits the user to generate three-dimensional isovalue plots illustrating the differences in distribution and geometry of aquifers as different cutoff or threshold criteria are applied. The dataset also enables one to delineate the regional lithostratigraphic units nested within stratigraphically complex rock formations.

Tags
3D MODELS 82I 82J 82N 82O 82P 83A 83B 83C 83D 83E 83F 83G 83H 83I 83J 83K 83L ALBERTA BASIN ALBERTA FOOTHILLS AQUIFERS BOREHOLES DATA GEOPHYSICAL LOGS GEOSTATISTICS HYDROSTRATIGRAPHY LITHOSTRATIGRAPHY PASKAPOO FORMATION SAND

Title and Dataset Information

Alternative Title

Modelled Sandiness of the Paskapoo Formation, Alberta (Tabular data, tab-delimited format)

Date Modified

2016-03-29

Update Frequency

Other

Publisher / Creator Information

Publisher

Alberta Energy Regulator

Subject Information

Start Date

2009-01-01

End Date

2011-01-01

Spatial Coverage

-120,50,-112,55

Resource Dates

Date Created

2012-09-12

Date Added to catalogue

2017-02-16T20:06:11.990668

Date Issued

2012-09-12

Date Modified

2016-03-29

Identifiers

Usage / Licence

Usage Considerations

To define regional hydrostratigraphic units as inputs into mapping groundwater resources in the western part of Alberta.

Contact

Contact Name

Alberta Geological Survey

Contact Email

AGS-Info@aer.ca