The coal-dominated energy structure in the Beijing–Tianjin–Hebei region has caused serious air pollution and contradicts the construction of a clean, low-carbon, safe and efficient energy system. Substituting geothermal energy for fossil energy such as coal can effectively alleviate this problem. Located in the hinterland of the Beijing-Tianjin-Hebei region, the Jizhong Depression is rich in geothermal resources and has great development potential, though the degree of current development and utilization is not high. Vigorously developing geothermal energy can not only effectively alleviate the air pollution problem in the Beijing–Tianjin–Hebei region, but also optimize the regional energy structure. Geothermal reservoir temperature determines the development and utilization value of geothermal resources, and accurate evaluation of the geothermal reservoir temperature of geothermal resources can provide a reliable basis for the subsequent development of geothermal resources in the Jizhong Depression. Aiming at the commonly used sandstone geothermal reservoir and carbonate geothermal reservoir in the Jizhong Depression, this paper collected 24 sandstone geothermal reservoir geothermal fluids and 14 carbonate geothermal reservoir geothermal fluids in the central-southern area of the Jizhong Depression and a water chemistry test was carried out. According to the test results of water chemistry, the temperature of the geothermal reservoir is estimated by using the cation geothermometer, the SiO₂ geothermometer and the multi-mineral equilibrium method, and it is compared with the actual temperature measurement results of the boreholes. The results show that the direct use of a geothermal geothermometer for calculation will cause large errors. Through water–rock balance analysis, the use of a Na-K-Mg balance diagram, SiO₂ and 1000/T relationship diagram and Na/K and 1000/T relationship diagram can determine whether the geothermal fluid is suitable for the geothermometer, which can effectively reduce the error. The chalcedony geothermometer in the central and southern part of the Jizhong Depression is the most suitable. The multi-mineral balance method, the Na-K geothermometer and the K-Mg geothermometer have also achieved good results, while the quartz and Na-K-Ca geothermometers are not suitable for the south-central Jizhong Depression area.

中文翻译：

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基于综合多分量地温测量的地热储层温度估算——以华北平原冀中坳陷为例

京津冀地区以煤为主的能源结构造成了严重的空气污染，不利于构建清洁、低碳、安全、高效的能源体系。用地热能代替煤炭等化石能源可以有效缓解这一问题。冀中坳陷地处京津冀腹地，地热资源丰富，开发潜力大，但目前开发利用程度不高。大力发展地热能，不仅可以有效缓解京津冀地区大气污染问题，还可以优化区域能源结构。地热库温度决定地热资源的开发利用价值，准确评价地热资源地热储层温度，可为冀中坳陷地热资源后续开发提供可靠依据。针对冀中坳陷常用砂岩地热储层和碳酸盐地热储层，采集了冀中坳陷中南部地区24个砂岩地热储层地热流体和14个碳酸盐地热储层地热流体，进行了水化学试验。出去。根据水化学测试结果，利用阳离子地热计、SiO 针对冀中坳陷常用砂岩地热储层和碳酸盐地热储层，采集了冀中坳陷中南部地区24个砂岩地热储层地热流体和14个碳酸盐地热储层地热流体，进行了水化学试验。出去。根据水化学测试结果，利用阳离子地热计、SiO 针对冀中坳陷常用砂岩地热储层和碳酸盐地热储层，采集了冀中坳陷中南部地区24个砂岩地热储层地热流体和14个碳酸盐地热储层地热流体，进行了水化学试验。出去。根据水化学测试结果，利用阳离子地热计、SiO₂地温计和多种矿物平衡法，并与钻孔实际测温结果进行对比。结果表明，直接使用地热地温计进行计算会造成较大的误差。通过水石平衡分析，使用 Na-K-Mg 平衡图，SiO ₂和1000/T关系图和Na/K和1000/T关系图可以判断地热流体是否适合地温计，可以有效降低误差。以冀中坳陷中南部的玉髓地温计最为合适。多矿物平衡法、Na-K地温仪和K-Mg地温仪也取得了较好的效果，而石英和Na-K-Ca地温仪不适用于冀中坳陷中南部地区。