--> Abstract: Correlation of Mechanical Stratigraphy in the Mississippian, by C. J. Jennings and C. L. Liner; #90181 (2013)

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Correlation of Mechanical Stratigraphy in the Mississippian

C. J. Jennings and C. L. Liner
MArkUP Project, Dept. of Geosciences
University of Arkansas, Fayetteville, Arkansas 72701

The Mississippian formation of Oklahoma and Kansas has recently developed as a world class unconventional reservoir with some wells producing up to 800 bbl/day. The Mississippian is composed of multiple distinct lithologic zones including hard chert, limestone, tripolitic chert, and shale. These zones are difficult to discern with traditional log correlation. From our work, it may be possible to improve previous correlations of the Mississippian.

This study uses full wave sonic logs from Chautauqua Co., KS to analyze the elastic properties of the Mississippian. Raw material for this study consists of compressive strength logs in two wells. From sonic log data we compute metric compressive strength values, then create a model of rock strength at every log depth through the Mississippian and a short section above and below. From this we estimate the Weibull modulus, a key parameter relating the cumulative material failure with increasing pressure. Our results indicate the Weibull modulus varies vertically and laterally in the Mississippian.

AAPG Search and Discovery Article #90181©2013 AAPG/SEG Rocky Mountain Rendezvous, University of Wyoming, Laramie, Wyoming, September 27-30, 2013