烟台市栖霞东北部地热地温特征分析

Analysis of geothermal characteristics of qixia geothermal in the northeast of Yantai city

为了进一步探究栖霞东北部地温场及地温梯度特征,为该区域内地热资源开发利用提供依据,本文采用简易井温测井方法,收集已有机民井及钻探孔井温资料,并结合Surfer等绘图软件生成的图件对地温场及地温梯度进行综合分析。结果表明:(1)在相同的地下水埋藏深度条件下,调查区西北部地区相对其他位置具有相对更高的地温温度,且随着埋藏深度的增加,其温度差异随之增大。(2)本次调查工作前期共设计重点勘探靶区2处,其中臧家庄镇百佛院勘探靶区1与亭口镇寨里于家勘探靶区2内的地温梯度具有明显不同,其中臧家庄镇百佛院靶区内平均地温梯度为2.16℃/100m;亭口镇寨里于家靶区内平均地温梯度为1.51℃/100m,臧家庄镇百佛院靶区具有更高的地温梯度。(3)目前来看,调查区西北部地区相对于调查区其他位置具有更好的地热成矿热源条件,臧家庄镇百佛院勘探靶区相对亭口镇寨里于家勘探靶区具有更好的勘探前景。

In order to further explore the characteristics of geothermal field and geothermal gradient in the northeast of Qixia and provide the basis for the development and utilization of geothermal resources in the region,this paper uses simple well temperature logging method to collect the temperature data of organic wells and drilling holes,and combines the maps generated by surfer and other mapping software to conduct a comprehensive analysis of geothermal field and geothermal gradient. The results show that:( 1) at the same burial depth of groundwater,the northwest area of the survey area has relatively higher ground temperature than other areas,and the temperature difference increases with the increase of burial depth.( 2) In the early stage of this investigation,two key exploration targets were designed,among which the geothermal gradient in target area1 of Bai Fo Yuan in Zang Jia Zhuang Town is significantly different from that in target area 2 of Zhai Li Yu Jia in Ting Kou Town,among which the average geothermal gradient in target area of Bai Fo Yuan in Zang Jia Zhuang is 2. 16 ℃/100 m,the average geothermal gradient in target area of Zhai Li Yu Jia in Ting Kou Town is 1. 5 ℃/100 m,and geothermal gradient of Zang Jia Zhuang is higher than that of Ting Kou.( 3) At present,the northwest part of the survey area has relatively better geothermal metallogenic heat source conditions than other locations in the survey area,and the exploration target area of Zang Jia Zhuang has better exploration prospects than that of Ting Kou Town.