EERC is seeking bids to process a total of 236 square miles of 3D seismic data acquired in Fall and Winter 2024 in McLean County, North Dakota near the city of Underwood, North Dakota. We are seeking bids to process a total of 236 square miles of 3D seismic data acquired in Fall and Winter 2024 in McLean County, North Dakota near the city of Underwood, North Dakota. The survey is currently being acquired in two stages, the SW Zipper (150.7 square miles) and NE Zipper (85.3 square miles) to avoid highway US-83 which bisects the 3D survey extent. Acquisition parameters specific to the 3D seismic data are shown in Figures 4 and 5 for the SW and NE Zippers, respectively. The main imaging focus for this project extends from the Upper Cretaceous (~600ms) strata including the Fox Hills, Pierre, and Greenhorn Formations extending below the top Precambrian basement reflector at approximately 2350ms. Our primary objectives are to evaluate the heterogeneity and thickness of the target storage zones and associated confining zones, and to assess subsurface structure, including the mapping of Precambrian basement topography and associated geologic structures as well as faults within the Upper Cretaceous – Precambrian basement interval. This 3D seismic survey will serve as the baseline survey for future monitoring surveys during the operational phase of the storage hub and will include a compressive sensing component for future monitoring surveys.
