| 鲁东地区地热资源分布规律及勘查定井方法探讨 |
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| 作者姓名： | 崔煜烽 张杰 殷焘 史猛 毕建新 |
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| 作者单位： | 1.烟台市地质环境监测站,烟台 264000; 2.山东省第三地质矿产勘查院,烟台 264004 |
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| 摘 要： | 鲁东地区具有丰富的地热资源,在地热勘查、开发和利用中,对地热勘查定井方法的选择至关重要。在介绍鲁东地区地热资源分布特征和赋存规律的基础上,结合鲁东地区地热勘查及施工的经验和教训,针对不同的地热地质条件,分别采用天然电场选频、瞬变电磁法(TEM)测深、可控源音频大地电磁测深(CSAMT)、电磁测深和自然放射能测深等方法对鲁东地区典型地热勘查区进行地热井位确定,并对勘查定井方法效果进行对比。结果表明: 鲁东地热资源主要分布在NE向、NNE向及NW向断裂交汇带附近,为断裂控制的深循环对流型带状地热资源,热储分布主要受断裂控制,勘查定井宜选择在2条或多条断裂的交汇处; 天然电场选频、瞬变电磁法测深对于浅部地层和断裂具有较好的反映; 可控源音频大地电磁测深对断裂深部发育特征反映明显,为鲁东地热勘查定井较适宜的方法; 地热勘查定井宜采用2种以上的勘查方法,避免在物探施工过程中受外在因素的影响。
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| 关 键 词： | 地热资源 勘查定井方法 可控源音频大地电磁测深 鲁东地区 |
| 收稿时间： | 2017-11-27 |
Discussion on distribution of geothermal resources and locating wells methods of geothermal exploration in Eastern Shandong Province |
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| Authors: | CUI Yufeng ZHANG Jie YIN Tao SHI Meng BI Jianxin |
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| Institution: | 1. Yantai Geological Environment Monitoring Station, Yantai 264000, China; 2. Shandong No.3 Exploration Institute of Geology and Mineral Resources, Yantai 264004, China |
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| Abstract: | There are abundant geothermal resources in Eastern Shandong Province. And it’s crucial to select locating wells methods in the processes of geothermal exploration, development and utilization. On the basis of analyzing the distribution characteristics and occurrence rules of geothermal resources in Eastern Shandong Province, and with the experience of geothermal exploration and construction in the study area, the authors used different methods for different geothermal conditions to locate geothermal wells in the typical geothermal exploration areas in Eastern Shandong Province. These methods mainly include natural electric field frequency selection, transient electromagnetic method(TEM), controlled source audio magnetotelluric sounding(CSAMT), electromagnetic sounding and natural radioactivity sounding. The authors also compared the results of different methods. The results show that the geothermal resources in Eastern Shandong Province are mainly distributed near the intersection of the NE, NNE and NW faults, which are deep circulating convective ribbon geothermal resources controlled by faults. Because the thermal reservoirs distribution is mainly controlled by faults, it is appropriate to choose the intersection of two or more faults as the wells locations of geothermal exploration. Natural electric field frequency selection and transient electromagnetic method can better reflect the characteristics of shallow strata and faults. Controlled source audio magnetotelluric sounding can better reflect the development characteristics of deep faults, which is an appropriate method for geothermal exploration in Eastern Shandong Province. In order to avoid the influence of external factors in the process of geophysical exploration, more than two kinds of exploration methods should be adopted to locate geothermal wells. |
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| Keywords: | geothermal resources locating wells methods of geothermal exploration controlled source audio magnetotelluric sounding Eastern Shandong Province |
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