STUDY OF BASEMENT ROCKS WITH EMPHASIS ON FRACTURES WITH 3D SEISMIC AND WELL LOGS IN OSAGE COUNTY, OKLAHOMA

Study of Basement Rocks with Emphasis on Fractures with 3D Seismic and Well Logs in Osage, Oklahoma

By Kevin Liner and Christopher Liner

Kliner@uark.edu, liner@uark.edu

3D seismic surveys in Osage County, Oklahoma can be interpreted for basement features that may effect overlying sedimentary formations. The 3D survey is on the Chautauqua platform about fifty miles North West of Tulsa, Oklahoma. Stratigraphy of the work area spans base of the Permian to Precambrian formations, with basement depth averaging around 5000ft in the survey area. The Precambrian basement rock outcrops in Mays County near the town of Spavinaw, Oklahoma. Granite paleotopograhic highs (referred to as the Tulsa Mountains) can be seen on a structural contour map of the basement on the eastern side of Osage County. Our goal is to study the Precambrian basement using well logs and 3D seismic to identify and track probable faults and fractures through the granite basement and into the overlying sedimentary section. It may be possible to clarify timing of basement fracturing events based on disruption of shallower formations.