![]() ![]() Conversely, evaporite and dolomite units have thermal conductivities of over 4 Wm -1K -1. Shale thermal-conductivity values appear to have been overestimated in the past Paleozoic shales in Kansas have thermal-conductivity values of approximately 1.18 ± 0.03 Wm -1K -1. The extreme variation in gradients observed in the holes occurs because of the large contrast in thermal-conductivity values. With these results, geophysical well logs can be used to predict temperatures as a function of depth in areas for which no temperatures are available if heat flow is assumed. ![]() In addition to cuttings measurements, thermal conductivities were estimated from geophysical well-log parameters useful results suggest more use of the technique in the future. Temperatures as high as 34☌ (93☏) occur at a depth of 500 m (1,650 ft) in the south-central portion of the state but are 28☌ (82☏) or lower at that depth in other parts of the state. Temperature gradients in the sedimentary section vary over a large range (over 4:1), and significantly different temperatures occur at the same depth in different portions of the state. ![]() Temperature data from an additional five wells also are presented. Several types of geophysical logs were run for these holes. These holes cut most of the sedimentary section and were cased and allowed to reach temperature equilibrium. Temperature, thermal-conductivity measurements, and heat-flow values are presented for four holes in Kansas originally drilled for cooperative water-resources investigations by the Kansas Geological Survey and the U.S. The article is also available as an Acrobat PDF file. Steeleĭepartment of Geological Sciences, Southern Methodist University Heat flow and geothermal potential of Kansas by David D. ![]() Steeples, ed., 1989, Geophysics in Kansas: Kansas Geological Survey, Bulletin 226, pp. ![]()
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