KGS Home Current Research Home
Kansas Geological Survey, Current Research in Earth Sciences, Bulletin 250, part 2
Next Page--Historical Aspects, Definition

The Geology of Kansas


Evan K. Franseen, Alan P. Byrnes, Jason R. Cansler*, D. Mark Steinhauff**, and Timothy R. Carr, Kansas Geological Survey, The University of Kansas, Lawrence, KS 66047, USA
*Present Address: ChevronTexaco
**Present Address: ExxonMobil Exploration Company

Summary and citation information available for this article. The complete article is available as an Acrobat PDF file (1.7 MB). You will need the Acrobat PDF Reader, available free from Adobe, to read this report.

Introductory Comments

Cambrian-Ordovician Arbuckle Group rocks in Kansas occur entirely in the subsurface. As is demonstrated throughout this paper, the historical and current understanding of the Arbuckle Group rocks in Kansas has in large part been dependent on petroleum-industry philosophies, practices, and trends. The widely accepted conceptual model of Arbuckle reservoirs as an unconformity play guided drilling and completion practices in which wells were drilled into the top of the Arbuckle with relatively short penetration (under 10 to 50 ft) deeper into the Arbuckle. This resulted in very little log or core data available from the Arbuckle interval. In addition, due to the early development (1917-1940) of the majority of Arbuckle reservoirs, log and geophysical data are not up to modern standards. Over the last few decades, deep penetrating wells have been drilled into the Arbuckle accompanied by full modern log suites and drill-stem tests. However, little corresponding core has been taken to calibrate the logs, and no detailed studies have been conducted to date on the more extensive, modern log data. Thus, data and detailed understanding of Arbuckle Group strata in Kansas are lacking relative to Arbuckle and age-equivalent strata from other areas in the United States, especially those where Arbuckle strata crop out. However, Arbuckle Group strata remain an important reservoir target in Kansas, and our understanding of the unit will increase with continued studies that incorporate modern data, techniques, and approaches.

Next Page--Historical Aspects, Definition

Kansas Geological Survey
Web version Dec. 27, 2004