Geothermal Development in Eritrea: A Country Update
Geothermal Development in Eritrea: A Country Update
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厄立特里亚的地热开发：国家最新情况
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
E. Yohannes
中科院分区：
文献类型：
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作者：
E. Yohannes
依赖进口精炼石油产品发电不仅对厄立特里亚的经济发展产生不利影响，而且造成环境污染。这种影响既可以从燃料价格频繁上涨的角度来看待，也可以从温室气体排放造成的环境退化的角度来看待。因此，地热能将在减少外汇支出和保护环境方面发挥重要作用。厄立特里亚东南沿海地区的构造环境和地质结构有利于开发地热资源，可主要用于发电和直接利用。Alid和Nabro-Dubbi地热区是值得注意的前景，有丰富的地热表现。Alid地热前景的地面勘探调查表明，根据气体地质温度计的估计，储层温度高达250摄氏度以上。裂缝和断层密度（FFD）分析表明，构造具有渗透性，前景可能位于该区域的上流区。在FFD等高线图上，70°N方向的高断裂带清晰可见。最近进行的电阻率测量显示，在前景区域存在正异常，这促使进行进一步的勘探测量。2011年Nabro火山爆发表明，该地区的构造活动很活跃，此后出现的许多火山孔就是证明。
Dependence of imported refined petroleum products for electric power generation has not only adverse effects on the economic development of Eritrea but also causes environmental pollution. The impact can be viewed both in terms of frequent increment of fuel prices and environment degradation through emission of greenhouse gases. Geothermal energy will therefore have an important input in alleviating expenditure on foreign currency while safeguarding the environment. The tectonic setting and geological setup of the south-eastern coastal zone of Eritrea is conducive for development of a geothermal resource that can be harnessed mainly for electrical generation and direct utilization. Alid and Nabro-Dubbi geothermal areas are notable prospects with ample geothermal manifestations. Surface exploration surveys in Alid geothermal prospect indicated high reservoir temperatures of >250oC as estimated from gas geothermometers. Fracture and fault density (FFD) analyses carried out indicate that structures are permeable and probably the prospect is located at the up-flow zone of the region. A 70°N trending high fracture zone is well marked on the FFD contour plot. The resistivity surveys conducted recently show a positive anomaly at the prospect area and this prompted further exploration surveys to be conducted. The 2011 volcanic eruption in Nabro indicates that the area is tectonically active as evidenced by numerous fumaroles that appeared thereafter.