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GeoRef Categories
Era and Period
Epoch and Age
Book Series
Date
Availability
High-resolution petrophysical, geochemical, and geomechanical profiling of a 230-m continuous core from the Montney Formation, Canada Available to Purchase
Probabilistic assessment of induced seismicity at the Alberta No. 1 geothermal project site Open Access
Earthquakes Induced by Wastewater Disposal near Musreau Lake, Alberta, 2018–2020 Available to Purchase
Automated Microseismic Processing and Integrated Interpretation of Induced Seismicity during a Multistage Hydraulic‐Fracturing Stimulation, Alberta, Canada Available to Purchase
Focal-time analysis: A new method for stratigraphic depth control of microseismicity and induced seismic events Open Access
High-frequency sequences, paleogeography, and syn-depositional tectonism on a shallow clastic ramp: Doe Creek and Pouce Coupe members of the Late Cenomanian Kaskapau Formation, Western Canada Foreland Basin Available to Purchase
Sweet Spot and Porosity Development in an Unconventional Source Rock Play Available to Purchase
Diligent reservoir characterization is the key to successful production in most unconventional plays. Unconventional resource plays require one to adapt to the scale of observation (1 nm to 1 μm) and to use special imagery techniques (e.g., scanning electron microscope [SEM], ion-milled SEM) to characterize the nature and classes of the pore system. For the Duvernay Formation, a quantitative approach to porosity typing and measurement was conducted on two- and three-dimensional focused ion beam SEM images. These images showed that between 69% and 85% of the porosity is kerogen porosity, with an average of 75% for the studied wells. It is important to recognize that although organic porosity is also developed in the less mature wells, the biggest pores were found in the most mature areas. These results indicate that there is a positive correlation between liquid yield and pore size, as well as a positive correlation between thermal maturity and pore size. The pore volume and/or the number of accessible pores increase (i.e., hydrocarbon in the pore volume and, thus, permeability) following the same trend as the mean pore size. It is concluded that the matrix porosity and, more importantly, the matrix permeability are primarily the result of thermal maturation of the kerogen. These results were not observed in previous studies due to an erroneous estimation of maturity using vitrinite reflectance, or a lack of appropriate diversity and quality of samples collected throughout the maturation phase windows to obtain statistically representative results. Subsurface data (wells, seismic), outcrop work from literature, and public domain production data from the West Shale Basin were integrated at the regional scale with this nanoscale pore-system characterization to define the hydrocarbon production potential of the Duvernay Formation.