Triassic doig formation sand bodies in the Peace River area of western Canada : depositional and structural models, and the impact of diagenesis on reservoir properties ...

• Main Author: Harris, Richard Gordon
• Format: Text
• Language: English
• Published: University of British Columbia 2009
• Subjects: Peace River
• Online Access: https://dx.doi.org/10.14288/1.0052321; https://doi.library.ubc.ca/10.14288/1.0052321

Middle Triassic Doig reservoirs in the Fireweed, Buick Creek, Cache Creek and West Stoddart fields (94-A-13 to Twp.86, Rge.18) of northeastern British Columbia consist of deltaic and shoreline sands encased in shelf and offshore mudstones and siltstones. The reservoirs comprise a series of northwest and northeast trending elongate sand bodies that lie along a south-southeast depositional trend analogous to the position of the original Doig shoreline. Sediments of the Doig Formation are divisible into two facies associations and ten lithofacies representing deposition in shelf to offshore, and deltaic and inter-deltaic environments. Hydrocarbon producing intervals consist of clean, very fine to fine grained, sub-lithic to quartz arenites, inter-bedded sandstones and bioclastic detritus, and disseminated bioclasts. Effective porosity is primarily inter-granular in the sandstone facies with significant moldic and intra-granular porosity developed in the coquina facies at the West Stoddart and Cache Creek ...