Open-File Report 2010-1123
1 Oklahoma State University, Stillwater, OK
2 U.S. Geological Survey, Denver, CO
3 School of Geology, Oklahoma State University, Stillwater, OK
4 Oklahoma Water Resources Board, Oklahoma City, OK
5 U.S. Geological Survey, Albuquerque, NM
6 Dynamic Graphics, Inc., Alameda, CA
The Arbuckle-Simpson aquifer of south-central Oklahoma encompasses more than 850 square kilometers and is the principal water resource for south-central Oklahoma. Rock units comprising the aquifer are characterized by limestone, dolomite, and sandstones assigned to two lower Paleozoic units: the Arbuckle and Simpson Groups. Also considered to be part of the aquifer is the underlying Cambrian-age Timbered Hills Group that contains limestone and sandstone. The highly faulted and fractured nature of the Arbuckle-Simpson units and the variable thickness (600 to 2,750 meters) increases the complexity in determining the subsurface geologic framework of this aquifer.
A three-dimensional EarthVision™ geologic framework model was constructed to quantify the geometric relationships of the rock units of the Arbuckle-Simpson aquifer in the Hunton anticline area. This 3-D EarthVision™ geologic framework model incorporates 54 faults and four modeled units: basement, Arbuckle-Timbered Hills Group, Simpson Group, and post-Simpson. Primary data used to define the model’s 54 faults and four modeled surfaces were obtained from geophysical logs, cores, and cuttings from 126 water and petroleum wells. The 3-D framework model both depicts the volumetric extent of the aquifer and provides the stratigraphic layer thickness and elevation data used to construct a MODFLOW version 2000 regional groundwater-flow model.
First posted July 16, 2010
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Faith, J.R., Blome, C.D., Pantea, M.P., Puckette, J.D., Halihan, Todd, Osborn, Noel, Christenson, Scott, Pack, Skip, 2010, Three-dimensional geologic model of the Arbuckle–Simpson aquifer, south-central Oklahoma: U.S. Geological Survey Open-File Report 2010–1123, 29 p.
Purpose and Scope
Significance of Three-Dimensional Geologic Modeling for Groundwater Modeling