This digital data release includes mercury porosimetry results of selected samples for analyses of shale gas, oil and liquids. The strata evaluated include the following units:
- basal Banff Formation,
- Colorado Group,
- Montney Formation,
- Muskwa Formation,
- Wilrich Member, and
- Rierdon Formation.
Lithologies are generalized and based on visual description.
Allocation of stratigraphic unit names was based on available stratigraphic information at the time of sampling. No attempt was made to reallocate samples within a consistent regional stratigraphic framework. In some cases, stratigraphic unit allocation may be incorrect.
We compiled the data into a single dataset for ease of use. A combination of Sample_ID and Point_Sequence_Porosimetry will result in unique records. A site may have multiple samples, and each sample may have multiple analyses performed on it.
Fields with blank analysis values indicate that the specified test was not run on that sample. The number of significant digits of the sample results is provided by the laboratory. Trailing zeros may have been dropped by Microsoft Excel or Microsoft Access during data processing.
All attributes have well defined domains and were found to be valid within the domains.
The term shale describes a fine-grained, organic-rich rock and may not imply fissility.
We collected representative core samples based on available core for the target formations to get a reasonable spatial distribution of data. The core did not always cover the entire target interval. We performed high-density sampling in the shale targets and fine-grained rocks. Lower density sampling was done in other lithologies and bounding formations. If Date_Collected is 20xx-01-01, we collected the sample during the year indicated, but the exact date is unknown.
Core samples were collected at the Alberta Energy Regulator’s Core Research Centre.
Geologists recorded the sample and site information, such as location, depth, formation, and a brief lithological description at the time of collection.
The thirteen laboratory parameters with constant values that do not appear in the Porosimetry data are;
Hg Parameters:
- Adv. Contact Angle = 130 degrees
- Hg Surface Tension = 485 dynes/cm
- Rec. Contact Angle = 130 degrees
- Hg Density = 13.5335 g/mL
Low Pressure:
- Evacuation Pressure = 50 µmHg
- Evacuation Time = 5 mins
- Equilibration Time = 10 secs
High Pressure:
- Equilibration Time = 10 secs
Pore Structure Summary:
- Permeability constant = 0.00442
- BET Surface Area = 230 m²/g
- Pore shape exponent = 1
Mayer Stowe Summary:
- Interstitial porosity = 47.63 %
- Breakthrough pressure ratio = 3.3512
Sample_ID: 9296 and 9317 analyses have a High Pressure Equilibration Time of 180 secs rather than 10 secs.