北京通州地温场特征及其影响因素

在收集整理大量地热井温度资料的基础上，系统分析了北京通州地区现今地温场特征，划分了地热异常区，并进一步估算了1000~3000 m埋深处的地层温度。研究表明，研究区现今地温梯度为1.34~3.12℃/100 m，平均值为1.88℃/100 m。大地热流值分布范围为47.1~75.9 mW/m2，平均值为63.2 mW/m2，其热流状态较好。在垂向上，研究区1000 m埋深处整体温度均超30℃，2000 m时高温异常区温度超60℃，3000 m时高温异常区温度超80℃。根据深部地层温度估算，在研究区的南部及东南部具有2处高温异常区，地温场分布形态与区域内主要断裂走向基本一致，主要受区域地质构造控制，岩石性质为地温场分布的重要影响因素。

Geothermal field in Tongzhou District of Beijing and its influencing factors

Based on a large number of geothermal well temperature data, the distribution of the current geothermal field in Tongzhou District of Beijing is systematically analyzed, the geothermal anomaly area is divided, and the formation temperature at the depth of 1000~3000 m is further estimated. The results show that the current geothermal gradient ranges from 1.34 ℃/100 m to 3.12 ℃/100 m with an average of 1.88 ℃/100 m. Terrestrial heat flow values range from 47.1 mW/m2 to 75.9 mW/m2 with an average of 63.2 mW/m2. Vertically, the estimated temperature in the study area is over 30 ℃ at depth of 1000 m, the temperature of the high temperature abnormal area is over 60 ℃ at 2000 m, and over 80 ℃ at 3000 m. According to the estimation of deep formation temperature, there exist two high temperature anomaly areas in its south and southeast. Controlled by regional geological structure, the distribution pattern of geothermal field is basically consistent with the strike of regional main faults. In addition, the lithology is also one of the important influencing factors.