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Using seismic data to delineate tectonic and depositional features within the Springer Formation, Blaine, Canadian and Caddo counties, Oklahoma

Fritz, Daniel James
The Springer interval in an area of the eastern Anadarko Basin was analyzed using a 3D seismic dataset. The purpose was to determine if 3D could effectively image the rock volume between well control points. Specifically the study was designed to test the ability of 3D seismic to delineate tectonic features such as faults and depositional features such as thick sandstone bodies that are potential gas reservoirs. Seismic was also utilized to improve the stratigraphic framework by utilizing extensive marine shale deposits and the truncation of the Springer section against the Pennsylvanian unconformity. Synthetic seismograms were created and found to be effective in correlating to several different stratigraphic units. Seismic data was able to effectively define structural attitude of beds, and was able to identify faults, internal stratigraphic thickness and channel-like features. RMS amplitudes were able to identify features seen on isochron maps and enhanced the view of the channel-like features. Channel-like features in the Chester Limestone to Morrow Base interval have a northwest to southeast trend, whereas in the Morrow Base to Novi Limestone interval, the channel-like features trend northeast to southwest. Channels were confirmed using seismic sections and well logs. Seismic sections show the apparent angular unconformity at the Morrow Base. Subsequent basinal subsidence may have affected the trends of Morrow channels.