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干酪根自由基浓度是研究有机质热演化的有效指标之一．也是研究沉积盆地古地温的热参数之一。本文根据新生代盆地干酪根自由基浓度与样品埋藏深度的关系，建立了推算古地温梯度的标准曲线图，并利用此标准曲线估算了塔里木盆地和辽河盆地两口井的古地温梯度。这一方法对于无镜质体地区和无磷灰石地区的古地温研究提供了新的思路。
Free radical concentration of kerogen is one of the effective indicators for studying the thermal evolution of organic matter. It is also one of the thermal parameters for studying paleo-geothermal in sedimentary basins. Based on the relationship between kerogen radical concentration and sample burial depth in Cenozoic basins, a standard curve for estimating paleogeothermal gradient was established and the paleogeothermal gradients of two wells in Tarim Basin and Liaohe Basin were estimated by using this standard curve. This method provides a new idea for the paleotemperature study in non-vitrinite and apatite regions.