| 雄安新区现今地温场特征及成因机制 |
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| 引用本文： | 王朱亭,张超,姜光政,胡杰,唐显春,胡圣标.雄安新区现今地温场特征及成因机制[J].地球物理学报,2019,62(11):4313-4322. |
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| 作者姓名： | 王朱亭 张超 姜光政 胡杰 唐显春 胡圣标 |
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| 作者单位： | 1. 中国科学院地质与地球物理研究所岩石圈演化国家重点实验室, 北京 100029;2. 中国科学院大学, 北京 100049;3. 中国科学院地球科学研究院, 北京 100029;4. 中国地质科学院, 北京 100037 |
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| 基金项目： | 深部岩溶热储地热能聚敛动力学过程研究（2018YFC0604302）和支持"率先行动"中国博士后科学基金、中国科学院联合资助优秀博士后项目（2017LH015）及中国地质调查"雄安新区地热清洁能源调查评价DD20189114"和"JYYWF20181101"项目资助. |
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| 摘 要： | 雄安新区位于渤海湾盆地冀中坳陷内，区内主要包含有牛驼镇凸起、容城凸起、高阳低凸起等次级构造单元.通过分析该区最近实测的8口钻井测温曲线和108块岩石热导率实测数据并结合前人的研究成果，对雄安新区内部地温梯度、大地热流分布规律等进行了分析.结果表明雄安新区内部不同构造单元地层的地温梯度在垂向上可划分为两段：上部沉积盖层段，地温梯度值在25.2~58.9℃·km-1之间；下部白云岩段地温梯度较低，主要在5℃·km-1附近.同时地温梯度在平面上具有明显的区域性特征，牛驼镇凸起地温梯度值最高，范围为46.5~58.9℃·km-1；容城凸起区地温梯度次之，范围在32.0~40.9℃·km-1之间；凹陷及低凸起区地温梯度较低，唯一的实测值显示为25.2℃·km-1.通过搜集的热流值绘制的热流图也显示出凸起区热流值高，凹陷区热流值相对较低的特点.雄安新区较高的现今地温场特征与其处于弧后拉张的构造背景相关.同时，基岩地层凹凸相间的格局、砂泥质盖层直接覆盖在碳酸盐地层之上的地层组合、热储层段内的地下水对流作用、断裂的发育等共同造成了雄安新区较高的现今地温场特征.
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| 关 键 词： | 雄安新区 钻井测温曲线 岩石热导率 现今地温场特征 |
| 收稿时间： | 2018-05-05 |
Present-day geothermal field of Xiongan New Area and its heat source mechanism |
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| WANG ZhuTing,ZHANG Chao,JIANG GuangZheng,HU Jie,TANG XianChun,HU ShengBiao.Present-day geothermal field of Xiongan New Area and its heat source mechanism[J].Chinese Journal of Geophysics,2019,62(11):4313-4322. |
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| Authors: | WANG ZhuTing ZHANG Chao JIANG GuangZheng HU Jie TANG XianChun HU ShengBiao |
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| Institution: | 1. State Key Laboratory of Lithosphere Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China;2. University of Chinese Academy of Sciences, Beijing 100049, China;3. Innovation Academy for Earth Science, Chinese Academy of Sciences, Beijing 100029, China;4. Chinese Academy of Geological Sciences, Beijing 100037, China |
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| Abstract: | Geologically the Xiongan New Area is within the Jizhong Depression of Bohai Bay Basin. The study area consists of 3 lower-order structural units:the Rongcheng Uplift, the Niutuozhen Uplift and the Gaoyang Uplift. Temperature logs from 8 boreholes and thermal conductivity measurements of 108 rock samples are newly acquired. Integrated with previous research, the present geothermal gradients and heat flow distribution within the Xiongan New Area are analyzed. Results shows that in vertical direction the geothermal system can be divided into two parts:the upper sedimentary layer with the geothermal gradients ranging from 25.2~58.9℃·km-1, and the bedrock layer with geothermal gradients around 5℃·km-1. In addition, the temperature gradient distribution is associate with the structural units, the Niutuozhen Uplift has the highest geothermal gradient which ranges from 46.5℃·km-1 to 58.9℃·km-1; the geothermal gradient is slightly lower in the Rongcheng Uplift with the values vary from 32.0℃·km-1 to 40.9℃·km-1, the depression and low uplift Area has the lowest geothermal gradient in which the only one borehole shows the average geothermal gradient of 25.2℃·km-1. The heat flow map which is conducted through collecting published data shows the similar tendency, the uplift area has the higher heat flow value than the depression. The high present temperature field of Xiongan New Area has great associated with the back-arc tectonic background. The convection of the groundwater, the combination of the stratum and the well-developed faults that all contribute the high present temperature field of this area. |
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| Keywords: | Xiongan new area Borehole temperature logging Thermal conductivity Heat flow |
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