Seismic characterization of deep Illinois Basin reservoirs as possible targets for carbon sequestration

Assessing the feasibility of sequestration of carbon dioxide in deep saline reservoirs of the Illinois Basin (USA) has been guided largely by the mapping and analysis of 2D and 3D seismic reflection data. One of the primary issues for sequestration planning in this region is the detection and mappin... Full description

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Authors:McBride, J.H.; Leetaru, H.E.; Keach, R.W.
Volume Title:2008 AAPG annual convention & exhibition; abstracts volume
Source:Abstracts: Annual Meeting - American Association of Petroleum Geologists, Vol.2008; AAPG 2008 annual convention & exhibition, San Antonio, TX, April 19-23, 2008. Publisher: American Association of Petroleum Geologists and Society for Sedimentary Geology, Tulsa, OK, United States
Publication Date:2008
Note:In English
Subjects:Brines; Cambrian; Carbon sequestration; Discontinuities; Gas storage; Geophysical methods; Knox Group; Mount Simon Sandstone; Oil and gas fields; Paleozoic; Reservoir properties; Reservoir rocks; Salt water; Seismic attributes; Seismic methods; Upper Cambrian; Illinois Basin; United States; Tonti Field
Record ID:2010041078
Copyright Information:GeoRef, Copyright 2020 American Geosciences Institute. Reference includes data supplied by American Association of Petroleum Geologists, Tulsa, OK, United States
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Assessing the feasibility of sequestration of carbon dioxide in deep saline reservoirs of the Illinois Basin (USA) has been guided largely by the mapping and analysis of 2D and 3D seismic reflection data. One of the primary issues for sequestration planning in this region is the detection and mapping of small-scale faults or other structural discontinuities at the target level near the Cambrian Mt. Simon Sandstone. Such discontinuities, which may affect the reservoir and its overlying sealing strata, must reliably be detected and mapped in three dimensions before a reservoir can be deemed suitable for sequestration. The Paleozoic strata in the Illinois Basin have been deformed by multiple episodes of tectonism; however, most of the deformation has produced relatively small displacements when viewed at conventional seismic scales. In this study, we test various techniques to enhance seismic interpretation of the structure of a small oil field, Tonti in the Illinois Basin. Techniques used include 3D spectral decomposition and semblance, combined with other seismic attributes, in order to demonstrate the crucial need for broad bandwidth data and 3D continuity-based seismic attributes when mapping the subtle structural discontinuities that characterize the basin. The results show that 3D seismic attributes can identify fault-related discontinuities at or near the sealing horizon (base of the Knox Group (Cambro-Ordovician; at or near the top of the Mt. Simon Sandstone)) whereas on conventional 2D seismic profiles these discontinuities are at best difficult or impossible to interpret as faults.