Uppermost Cretaceous, Post-Colorado Group Gas Resources of the Western Canada Sedimentary Basin, Interior Plains


Book Description

This report documents an assessment of uppermost Cretaceous to Tertiary gas resources in the interior plains of the Western Canada Sedimentary Basin. The resources are described in terms of detailed geological play analysis and numerical assessment of undiscovered gas potential using a technique termed the discovery process model, which employs the volume and discovery sequence of individual pools or plays, within a natural population of pools or plays, to predict undiscovered potential. The analysis evaluated 12 mature and 2 immature established plays, and identified one conceptual play. The geology of the plays is outlined in a manner that can be used as a guide for exploration, and each play is designated by geological formation, reservoir, or trap type.













Sequence Stratigraphy of Cretaceous Cycles in the Southern Margin of a Paleozoic Foreland Basin, Black Warrior Basin, Mississippi


Book Description

The southern Black Warrior Basin has been the site of limited drilling operations, but a critical need existed for a greater understanding of the regional stratigraphy. The objectives of this study were to define a sequence stratigraphic framework for the southernmost Black Warrior Basin, to identify chronostratigraphic timelines within depositional environments, identify regional transgressive and regressive cycles. This information was used to identify three target reservoirs, characterize petrophysical properties, and confirm integrity of reservoir and seal formations for geologic storage. Methods included correlation of petrophysical well logs in the study area, petrographic well log analysis, and core analyses. Five cycles were identified in well log cross sections. Sequence boundaries were identified in cross sections and tied to seismic data. Cretaceous sediments deposited above a Paleozoic sequence boundary that may represent ~141 ma of erosion or non-deposition. These results contributed to development of a proposed geologic carbon sequestration facility in Mississippi.