In this study, Shengli fault depression, Tangyuan fault basin, and northern Songliao Basin in Yitong-Yilan fault zone of Heilongjiang province are considered the research areas for geothermal anomaly. Based on the temperature of the deep thermal reservoir, the hydrothermal fluid channel, caprock thickness, and the mode of heat transfer, which are the main factors controlling the geothermal reservoir formation, we examined geothermal resource system of the underground HDR in this area. First, we inversed the aeromagnetic data, calculated the Curie isotherm depth, analyzed the geothermal distribution characteristics, and estimated the temperature of the deep heat source. Second, we applied the controlled source audio frequency magnetotelluric (CSAMT) and magnetotelluric (MT) methods to obtain the deep electrical structure of the study area. We determined the thickness of the caprock and the hydrothermal fluid channel. Finally, we obtained the borehole geothermal steady-state temperature measurement data and water sample chemical analysis data from the logging temperature curves of 24 wells to infer the mode of heat transfer. Based on the results, we built a model of the geothermal system of the sedimentary basin in this area. The results show that the depth of Curie isotherm in the study area is 17–39 km. The resistivity of sedimentary caprock in the north of Songliao basin is low, and there exists a deep heat source, which is mainly thermal convection. In contrast, in Shengli and Tangyuan fault basins, heat conduction is dominant. Based on the geothermal system model, we conclude that the area from Daqing to Lindian in Songliao basin has a thermal-convection-dominated sedimentary basin geothermal system. Heat exchange is realized by the upwelling of mantle-derived thermal materials through fracture channels. The thick sedimentary caprock reduces the heat loss. It can be a target for sustainable development and utilization of HDR.

本研究以黑龙江省伊通—宜兰断裂带的胜利断裂，汤原断裂盆地和松辽盆地北部为研究对象。基于深层热储层的温度，热液通道，盖层厚度和传热方式，这些是控制地热储层形成的主要因素，我们研究了该区域地下HDR的地热资源系统。首先，我们反转了航磁数据，计算了居里等温线深度，分析了地热分布特征，并估算了深热源的温度。其次，我们应用受控源音频大地电磁（CSAMT）和大地电磁（MT）方法获得研究区域的深层电气结构。我们确定了盖层和热液通道的厚度。最后，我们从24口井的测井温度曲线中获得了井下地热稳态温度测量数据和水样化学分析数据，以推断传热方式。根据结果​​，我们建立了该地区沉积盆地地热系统的模型。结果表明，研究区的居里等温线深度为17-39 km。松辽盆地北部沉积盖层的电阻率低，存在深部热源，主要是热对流。相反，在胜利和汤原断层盆地，热传导占主导地位。根据地热系统模型，我们认为，松辽盆地大庆至林甸地区具有以热对流为主的沉积盆地地热系统。地幔衍生的热材料通过裂缝通道上升，实现了热交换。厚厚的沉积盖层可减少热量损失。它可以成为HDR可持续发展和利用的目标。