F.A. Stoakes, J.C. Wendte, C.V. Campbell, 1992. "Summary", Devonian-Early Mississippian Carbonates of the Western Canada Sedimentary Basin: A Sequence Stratigraphic Framework, Jack Wendte, Frank A. Stoakes, Clarence V. Campbell
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This section summarizes the nature of cyclicity, controls on depositional patterns and the occurrence of hydrocarbons in Devonian and early Mississippian strata in the WCSB. These strata comprise a thick succession of shallow-water carbonates and basin-filling shales, limestones and evaporites. The foregoing account provides a sequence stratigraphic framework for these deposits. This framework was established through the recognition of cyclicity at a number of different levels. The first-order cycles approximate the group level stratigraphy of the basin. At a finer level, the use of the depositional sequences defined in this manual provides a higher resolution of correlation than can be attained from either biostratigraphy or seismic stratigraphy. The recognition of cyclicity allows for predicting depositional patterns at many different levels. The understanding of facies distributions in time and space is critical to successfull exploration. This is especially important in the Devonian and early Mississippian of the WCSB where the majority of hydrocarbon traps are stratigraphic in nature.
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Devonian-Early Mississippian Carbonates of the Western Canada Sedimentary Basin: A Sequence Stratigraphic Framework
The Devonian and early Mississippian strata in the Western Canada Sedimentary Basin include a wide diversity of shallow-water carbonate and basin filling carbonate, shale and evaporite facies. Of these, the large Devonian platform-reef complexes are the most spectacular. They occur in magnificent exposures in the Front Ranges of the Canadian Rockies and in the subsurface of Alberta. In the subsurface, these complexes pool many of the largest oil and gas accumulations in Western Canada. This short course is intended to provide a summary of Devonian and early Mississippian deposits in the subsurface of the Western Canada Sedimentary Basin. One of the major goals is to present the evolution of these strata in a sequence-stratigraphic context. The role of sea-level, tectonic and depositional controls on “stacking” and facies patterns are considered. A second major goal is to relate the occurrence of hydrocarbon pools to this sequence-stratigraphic framework.