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Final Report - National Energy Technology Laboratory - U.S. ...

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Relative Stratigraphic Position (ft)*<br />

15000<br />

10000<br />

5000<br />

0<br />

-5000<br />

-10000<br />

1 2 3 4 5 6 7 8 9 10<br />

*<br />

Mean Vitrinite Reflectance (% R o )*<br />

Estimated Woodford-Chattanooga top<br />

Estimated Arbuckle top<br />

Latimer County, OK<br />

Sebastian County, OK<br />

Yell County, AR<br />

Logan County, AR<br />

Faulkner County, AR<br />

White County, AR<br />

Stratigraphic position relative to top of basal Atokan (Spiro/Orr) sandstone<br />

Figure 4. Depth vs. vitrinite reflectance profile for wells in Arkansas and Oklahoma. These profiles use the Spiro<br />

sandstone as a stratigraphic datum and indicate that thermal maturity of eastern Arkansas wells does not<br />

follow the inferred west-to-east increase in maturity across the basin. After Horn and Curtis (1996) and<br />

Houseknecht et al. (1992).

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