Advancing Geothermal Drilling Techniques in Canada

推进加拿大地热钻探技术

• 批准号: 514852-2017
• 负责人: Dusseault, Maurice
• 金额: $ 1.82万
• 依托单位: University of Waterloo
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=639842
• 关键词: Advancing; Geothermal; Drilling; Techniques; Canada

Energy decarbonization and energy storage are key elements in the world's energy future. In Canada, the coldclimate means that a great need for reliable heat and electrical power exists. In the North, diesel fuel, importedat great cost, generates all heat and power. Indigenous communities depend on this costly, carbon-rich sourcethat is also a fire hazard and potential pollutant. Geothermal energy in deep rock masses promises to provideheat and power to remote communities, enhancing their life quality and opening new possibilities forcommunity activities.Deep in the earth, the rock is hot enough to extract beneficial energy. In low permeability rock, this requiresseveral boreholes, carefully placed through directional drilling, and connected through hydraulic fracturing.New drilling techniques are emerging for deep hard rock - hammer drilling with reverse circulation. Afterfracturing to establish communication between optimally placed well pairs, fluid circulates through the rockmass to bring heat to the surface, used for power and heating.Dr. Dusseault will work with Scientific Drilling International (Canada) Inc. to advance technologies fordirectional drilling of deep geothermal boreholes in hard rock (low porosity sedimentary rocks, igneous rocks).Assessment of directional drilling methodologies with hammer drilling methods is a basis of study, as well asevaluation of geothermal efficiency potential for different well placements, needed to decide on the best wellplacement strategies. Well designs and various monitoring approaches will be examined for these issues, withthe goal of reducing drilling costs and making geothermal energy more accessible for northern Canadian

能源脱碳和储能是世界能源未来的关键要素。在加拿大，寒冷的气候意味着对可靠的热能和电力的巨大需求。在北方，所有的热能和电力都靠进口柴油来产生。土著社区依赖这种昂贵、富含碳的来源，但它也是火灾隐患和潜在污染物。深层岩体中的地热能有望为偏远社区提供热量和电力，提高他们的生活质量，并为社区活动开辟新的可能性。在地球深处，岩石的温度足以提取有益的能量。在低渗透性岩石中，这需要通过定向钻井仔细放置多个钻孔，并通过水力压裂连接。针对深层硬岩的新钻井技术正在出现——反循环锤钻。压裂后，在最佳位置的井对之间建立连通，流体在岩体中循环，将热量带到地表，用于发电和供暖。杜塞尔将与科学钻探国际（加拿大）公司合作，推进硬岩（低孔隙率沉积岩、火成岩）深层地热钻孔定向钻探技术。使用锤钻方法评估定向钻探方法是研究的基础，同时评估不同井位的地热效率潜力，以决定最佳的井位策略。将对这些问题进行油井设计和各种监测方法的研究，目的是降低钻井成本并使加拿大北部更容易获得地热能