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根据20口井的温度数据得到沁水盆地平均地温梯度为(28.2±1.03)℃/km．测试了39个岩石样品的热导率数据,计算了20个大地热流值．沁水盆地现今热流变化于44.75～101.81 mW/m~2之间,平均为(62.69±15.20)mW/m~2．运用Thermodel for Windows 2004软件对沁水盆地的古地温史进行了模拟,并得到了沁水盆地晚侏罗—早白垩世最大埋深时的平均古热流,北部为158.41 mW/m~2,中部为119.57 mW/m~2,南部为169.43 mW/m~2．恢复了地层的埋藏史,揭示了地层沉积结束和剥蚀开始的年龄为108～156 Ma,地层的剥蚀厚度北部为2603 m,中部为2291 m,南部为2528.9 m．其古地温场的分布格局为“南北高,中部低”,这在时间和空间上和煤层气的含气量分布相一致,初步显示古地温场对沁水盆地煤层气的形成具有控制作用．
According to the temperature data of 20 wells, the average geothermal gradient in Qinshui Basin is (28.2 ± 1.03) ℃ / km. The thermal conductivity data of 39 rock samples were tested and 20 geothermal heat values were calculated. Current Qinshui Basin current heat changes in 44.75 ~ 101.81 mW / m ~ 2, with an average of (62.69 ± 15.20) mW / m ~ 2. Using the Thermodel for Windows 2004 software, the paleotemperature of the Qinshui Basin was simulated and the average paleokraft at the maximum buried depth of the Late Jurassic - Early Cretaceous in the Qinshui Basin was obtained, with the northern part being 158.41 mW / m ~ 2. The middle part It is 119.57 mW / m ~ 2 and the southern part is 169.43 mW / m ~ 2. The burial history of the stratum was restored. The age of the end of the stratum sedimentation and the beginning of denudation was 108-156 Ma. The denuded thickness of the stratum was 2603 m in the north, 2291 m in the middle and 2528.9 m in the south. The distribution pattern of its paleo-geothermal field is “high in north and south, low in middle”, which is consistent with the distribution of gas content in coalbed methane in time and space. The results show that paleo-geothermal field plays a controlling role in the formation of coalbed methane in Qinshui Basin.