Sedimentology of the Slave Point Formation (Devonian) at Slave Field Lubicon Lake, Alberta
John B. Dunham, G. Allan Crawford, Walter Panasiuk, 1983. "Sedimentology of the Slave Point Formation (Devonian) at Slave Field Lubicon Lake, Alberta", Carbonate Buildups-A Core Workshop, Paul M. Harris
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Hydrocarbon production from the Slave Point Formation at Slave Field (T84, RI4W5), north-central Alberta, is light gravity (−35 API) oil. Leaching of megafossils, associated with dolomitization, has contributed to porosity development within the Slave Point Formation. The following report interprets the sequence of events which led to carbonate-reservoir development, based on data from eleven cores which penetrated the Slave Field reservoir. These data indicate that relative seA-1evel rise initiated shallow-water carbonate sedimentation on the flanks of a subaerially exposed granite-basement high. Subsequent seA-1evel rise resulted in upward growth of a carbonate bank which fringed the basement high. Core control documents a facies zonation from more open-marine type facies at the outer edges of the bank, to more restricted facies in the bank interior. An exposed granite island was present in the center of this carbonate bank, and continued seA-1evel rise led to progressive onlap of the granite structure.
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Carbonate buildups have long been a focus of intense geological study. An underlying reason is the importance of carbonate buildups as significant hydrocarbon reservoirs. This core workshop is intended to provide a “hands on” look at the subsurface geologic record created by carbonate buildups with emphasis on lithofacies, stratigraphy of buildups and their surrounding deposits, geometry, “reef”-building and sediment-producing organisms, and diagenesis and porosity evolution