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鄂尔多斯盆地庆３６井三叠系镜质体反射率为０．６１％～１．０６％，其碳化梯度（Ｒｍ／ｋｍ）较高，达０．３６％。运用不同方法分析表明，该盆地中生代古地温梯度可达３５～５７℃／ｋｍ，高于现今地温梯度。其它地温分析结果支持这一推论。推测高古地温梯度的原因可能是中生代时地壳厚度较薄和中侏罗世末一期热事件。讨论了高古地温梯度对于油气形成与勘探的影响。
The reflectance of the Triassic vitrinites from the Qing-36 well in the Ordos Basin ranges from 0.61% to 1.06%, and its carbonation gradient (Rm / km) is as high as 0.36%. The analysis of different methods shows that the Mesozoic paleo-geothermal gradient in this basin reaches 35 ~ 57 ℃ / km, which is higher than the current geothermal gradient. Other geothermal analyzes support this corollary. The reason for inferring the geothermal gradient of the paleobasically may be that the crustal thickness was thin during the Mesozoic and the last stage of the Middle Jurassic thermal event. The effects of high paleo-geothermal gradient on hydrocarbon formation and exploration are discussed.