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International Journal of Geophysics
Volume 2012, Article ID 231256, 14 pages
Research Article

Imaging the Morrow A Sandstone Using Shear Wave VSP Data, Postle Field, Oklahoma

Reservoir Characterization Project, Department of Geophysics, Colorado School of Mines, Golden, CO 80401, USA

Received 8 June 2012; Accepted 11 September 2012

Academic Editor: Joerg Schleicher

Copyright © 2012 Naser Tamimi and Thomas L. Davis. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Morrow sandstones constitute important oil-producing reservoirs in the Anadarko Basin in the Mid-Continent Region of the USA. Characterization of the Morrow A sandstone reservoir in Postle Field, Texas County, Oklahoma, is challenging due to its small thickness, low acoustic impedance contrast with the surrounding Morrow shale, and lithological heterogeneity. Shear wave data have been documented as a promising solution for imaging the Morrow A sandstone. Vertical seismic profiling (VSP) offers the potential to enhance shear wave imaging of the thin heterogeneous Morrow A sandstone at Postle Field. The zero-offset VSP results confirm the advantages of shear wave over compressional wave in imaging the Morrow A sandstone. Also, the final shear wave VSP image shows that, applying the proposed processing flow, we are able to image the Morrow A sandstone where the thickness is as thin as 8.5 m.