Boreholes for Geothermal Energy;New Drilling Technology

来源 :BIT`s 2nd Low Carbon Earth Summit-2012 2012第二届低碳科技大会 | 被引量 : 0次 | 上传用户:wutiepeng
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  Geothermal energy depends on cheap drilling because it constitutes 70-90% of the total geothermal development cost, highest for HDR projects.The state of the art drilling technology is with the petroleum industry whose high paying power creates no urge to develop geothermal technology.The paper presents ACT (adapted conventional technology) and new technology for geothermal drilling in terms of principles and productivity as applied on practical geothermal energy concepts.New drilling technology is shown to have potential for HDR hole-making 5-10x more efficient than before, thereby creating correspondingly cheaper wells, best for large diameters, allowing for complete heat exchangers in one hole.In conclusion a perspective is presented of a single 6000m HDR geothermal well capable of supplying a cold Norwegian village community of 2500 households beyond the Arctic Circle with its full winter need of heating energy at wellhead cost about EU1 per 100 KWh.Norway actually has for consideration competitive R&D aimed to nominate as winner whoever is able to be the first to deliver that village energy supply model.
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